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mame/src/devices/machine/stvcd.cpp
Vas Crabb 9bf81912d3 get rid of legacy BITSWAP* (nw)
2017-12-13 19:26:12 +11:00

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// license:LGPL-2.1+
// copyright-holders:Angelo Salese, R. Belmont
/***************************************************************************
machine/stvcd.c - Sega Saturn and ST-V CD-ROM handling
Another tilt at the windmill in 2011 by R. Belmont.
Status: All known discs at least load their executable, and many load
some data files successfully, but there are other problems.
Information sources:
- Tyranid's document
- A commented disassembly I made of the Saturn BIOS's CD code
- Yabuse's cs2.c
- The ISO/IEC "Yellow Book" CD-ROM standard, 1995 version
Address is mostly in terms of FAD (Frame ADdress).
FAD is absolute number of frames from the start of the disc.
In other words, FAD = LBA + 150; FAD is the same units as
LBA except it counts starting at absolute zero instead of
the first sector (00:02:00 in MSF format).
***************************************************************************/
#include "emu.h"
#include "imagedev/chd_cd.h"
#include "includes/saturn.h"
#include "cdrom.h"
#include "machine/timer.h"
#include "sound/cdda.h"
#include "debugger.h"
#include "coreutil.h"
// super-verbose
#if 0
#define CDROM_LOG(x) printf x;
#else
#define CDROM_LOG(x)
#endif
// HIRQ definitions
#define CMOK 0x0001 // command dispatch possible
#define DRDY 0x0002 // data transfer preparations complete
#define CSCT 0x0004 // finished reading 1 sector
#define BFUL 0x0008 // CD buffer full
#define PEND 0x0010 // CD playback completed
#define DCHG 0x0020 // disc change / tray open
#define ESEL 0x0040 // selector settings processing complete
#define EHST 0x0080 // host input/output processing complete
#define ECPY 0x0100 // duplication/move processing complete
#define EFLS 0x0200 // file system processing complete
#define SCDQ 0x0400 // subcode Q update completed
#define MPED 0x0800 // MPEG-related processing complete
#define MPCM 0x1000 // MPEG action uncertain
#define MPST 0x2000 // MPEG interrupt status report
// CD status (hi byte of CR1) definitions:
// (these defines are shifted up 8)
#define CD_STAT_BUSY 0x0000 // status change in progress
#define CD_STAT_PAUSE 0x0100 // CD block paused (temporary stop)
#define CD_STAT_STANDBY 0x0200 // CD drive stopped
#define CD_STAT_PLAY 0x0300 // CD play in progress
#define CD_STAT_SEEK 0x0400 // drive seeking
#define CD_STAT_SCAN 0x0500 // drive scanning
#define CD_STAT_OPEN 0x0600 // tray is open
#define CD_STAT_NODISC 0x0700 // no disc present
#define CD_STAT_RETRY 0x0800 // read retry in progress
#define CD_STAT_ERROR 0x0900 // read data error occurred
#define CD_STAT_FATAL 0x0a00 // fatal error (hard reset required)
#define CD_STAT_PERI 0x2000 // periodic response if set, else command response
#define CD_STAT_TRANS 0x4000 // data transfer request if set
#define CD_STAT_WAIT 0x8000 // waiting for command if set, else executed immediately
#define CD_STAT_REJECT 0xff00 // ultra-fatal error.
int saturn_state::get_timing_command(void)
{
/* TODO: calculate timings based off command params */
return 16667;
}
/* FIXME: assume Saturn CD-ROMs to have a 2 secs pre-gap for now. */
int saturn_state::get_track_index(uint32_t fad)
{
uint32_t rel_fad;
uint8_t track;
if(cdrom_get_track_type(cdrom, cdrom_get_track(cdrom, fad)) != CD_TRACK_AUDIO)
return 1;
track = cdrom_get_track( cdrom, fad );
rel_fad = fad - cdrom_get_track_start( cdrom, track );
if(rel_fad < 150)
return 0;
return 1;
}
int saturn_state::sega_cdrom_get_adr_control(cdrom_file *file, int track)
{
return bitswap<8>(cdrom_get_adr_control(file, cur_track),3,2,1,0,7,6,5,4);
}
void saturn_state::cr_standard_return(uint16_t cur_status)
{
if ((cd_stat & 0x0f00) == CD_STAT_SEEK)
{
/* During seek state, values returned are from the target position */
uint8_t seek_track = cdrom_get_track(cdrom, cd_fad_seek-150);
cr1 = cur_status | (playtype << 7) | 0x00 | (cdda_repeat_count & 0xf);
cr2 = (seek_track == 0xff) ? 0xffff : ((sega_cdrom_get_adr_control(cdrom, seek_track)<<8) | seek_track);
cr3 = (get_track_index(cd_fad_seek)<<8) | (cd_fad_seek>>16); //index & 0xff00
cr4 = cd_fad_seek;
}
else
{
/*
TODO:
- Whizz: wpset 0x608f030,4,w,wpdata==0x100&&pc!=0x6040006
*/
cr1 = cur_status | (playtype << 7) | 0x00 | (cdda_repeat_count & 0xf); //options << 4 | repeat & 0xf
cr2 = (cur_track == 0xff) ? 0xffff : ((sega_cdrom_get_adr_control(cdrom, cur_track)<<8) | (cdrom_get_track(cdrom, cd_curfad-150)+1));
cr3 = (get_track_index(cd_curfad)<<8) | (cd_curfad>>16); //index & 0xff00
cr4 = cd_curfad;
}
}
void saturn_state::mpeg_standard_return(uint16_t cur_status)
{
cr1 = cur_status | 0x01;
cr2 = 0; // V-Counter
cr3 = (0 << 8) | 0x10; // Picture Info | audio status
cr4 = 0x1000; // video status
}
void saturn_state::cd_exec_command( void )
{
uint32_t temp;
if(cr1 != 0 &&
((cr1 & 0xff00) != 0x5100) &&
((cr1 & 0xff00) != 0x5200) &&
((cr1 & 0xff00) != 0x5300) &&
1)
logerror("CD: command exec %04x %04x %04x %04x %04x (stat %04x)\n", hirqreg, cr1, cr2, cr3, cr4, cd_stat);
switch ((cr1 >> 8) & 0xff)
{
case 0x00:
//CDROM_LOG(("%s:CD: Get Status\n", machine().describe_context()))
hirqreg |= CMOK;
if(status_type == 0)
cr_standard_return(cd_stat);
else
{
cr1 = (cd_stat) | (prev_cr1 & 0xff);
cr2 = prev_cr2;
cr3 = prev_cr3;
cr4 = prev_cr4;
status_type = 0; /* Road Blaster and friends needs this otherwise they won't boot. */
}
//CDROM_LOG((" = %04x %04x %04x %04x %04x\n", hirqreg, cr1, cr2, cr3, cr4))
break;
case 0x01:
CDROM_LOG(("%s:CD: Get Hardware Info\n", machine().describe_context()))
hirqreg |= CMOK;
cr1 = cd_stat;
cr2 = 0x0201;
cr3 = 0x0000;
cr4 = 0x0400;
status_type = 0;
break;
case 0x02: // Get TOC
CDROM_LOG(("%s:CD: Get TOC\n", machine().describe_context()))
cd_readTOC();
cd_stat = CD_STAT_TRANS|CD_STAT_PAUSE;
cr1 = cd_stat;
cr2 = 102*2; // TOC length in words (102 entries @ 2 words/4bytes each)
cr3 = 0;
cr4 = 0;
xferdnum = 0;
hirqreg |= (CMOK|DRDY);
status_type = 0;
break;
case 0x03: // get session info (lower byte = session # to get?)
// bios is interested in returns in cr3 and cr4
// cr3 should be data track #
// cr4 must be > 1 and < 100 or bios gets angry.
CDROM_LOG(("%s:CD: Get Session Info\n", machine().describe_context()))
cd_readTOC();
switch (cr1 & 0xff)
{
case 0: // get total session info / disc end
cd_stat = CD_STAT_PAUSE;
cr1 = cd_stat;
cr2 = 0;
cr3 = 0x0100 | tocbuf[(101*4)+1];
cr4 = tocbuf[(101*4)+2]<<8 | tocbuf[(101*4)+3];
break;
case 1: // get total session info / disc start
cd_stat = CD_STAT_PAUSE;
cr1 = cd_stat;
cr2 = 0;
cr3 = 0x0100; // sessions in high byte, session start in lower
cr4 = 0;
break;
default:
osd_printf_error("CD: Unknown request to Get Session Info %x\n", cr1 & 0xff);
cr1 = cd_stat;
cr2 = 0;
cr3 = 0;
cr4 = 0;
break;
}
hirqreg |= (CMOK);
status_type = 0;
break;
/* TODO: double check this */
case 0x04: // initialize CD system
// CR1 & 1 = reset software
// CR1 & 2 = decode RW subcode
// CR1 & 4 = don't confirm mode 2 subheader
// CR1 & 8 = retry reading mode 2 sectors
// CR1 & 10 = force single-speed
// CR1 & 80 = no change flag (done by Assault Suit Leynos 2)
CDROM_LOG(("%s:CD: Initialize CD system\n", machine().describe_context()))
//if((cr1 & 0x81) == 0x00) //guess TODO: nope, Choice Cuts doesn't like it, it crashes if you try to skip the FMV otherwise.
{
if(((cd_stat & 0x0f00) != CD_STAT_NODISC) && ((cd_stat & 0x0f00) != CD_STAT_OPEN))
{
cd_stat = CD_STAT_PAUSE;
cd_curfad = 150;
//cur_track = 1;
fadstoplay = 0;
}
in_buffer = 0;
buffull = 0;
hirqreg &= 0xffe5;
cd_speed = (cr1 & 0x10) ? 1 : 2;
/* reset filter connections */
/* Guess: X-Men COTA sequence is 0x48->0x48->0x04(01)->0x04(00)->0x30 then 0x10, without this game throws a FAD reject error */
/* X-Men vs. SF is even fussier, sequence is 0x04 (1) 0x04 (0) 0x03 (0) 0x03 (1) 0x30 */
#if 0
for(int i=0;i<MAX_FILTERS;i++)
{
filters[i].fad = 0;
filters[i].range = 0xffffffff;
filters[i].mode = 0;
filters[i].chan = 0;
filters[i].smmask = 0;
filters[i].cimask = 0;
filters[i].fid = 0;
filters[i].smval = 0;
filters[i].cival = 0;
}
#endif
/* reset CD device connection */
//cddevice = (filterT *)nullptr;
}
hirqreg |= (CMOK|ESEL);
cr_standard_return(cd_stat);
status_type = 0;
break;
case 0x06: // end data transfer (TODO: needs to be worked on!)
// returns # of bytes transferred (24 bits) in
// low byte of cr1 (MSB) and cr2 (middle byte, LSB)
CDROM_LOG(("%s:CD: End data transfer (%d bytes xfer'd)\n", machine().describe_context(), xferdnum))
// clear the "transfer" flag
cd_stat &= ~CD_STAT_TRANS;
if (xferdnum)
{
cr1 = (cd_stat) | ((xferdnum>>17) & 0xff);
cr2 = (xferdnum>>1)&0xffff;
cr3 = 0;
cr4 = 0;
}
else
{
logerror("No xferdnum error\n");
cr1 = (cd_stat) | (0xff); // is this right?
cr2 = 0xffff;
cr3 = 0;
cr4 = 0;
}
// try to clean up any transfers still in progress
switch (xfertype32)
{
case XFERTYPE32_GETSECTOR:
case XFERTYPE32_PUTSECTOR:
hirqreg |= EHST;
break;
case XFERTYPE32_GETDELETESECTOR:
if (transpart->size > 0)
{
int32_t i;
xfertype32 = XFERTYPE32_INVALID;
// deallocate the blocks
for (i = xfersectpos; i < xfersectpos+xfersectnum; i++)
{
cd_free_block(transpart->blocks[i]);
transpart->blocks[i] = (blockT *)nullptr;
transpart->bnum[i] = 0xff;
}
// defrag what's left
cd_defragblocks(transpart);
// clean up our state
transpart->size -= xferdnum;
transpart->numblks -= xfersectnum;
if (freeblocks == 200)
{
sectorstore = 0;
}
hirqreg |= EHST;
}
break;
default:
break;
}
xferdnum = 0;
hirqreg |= CMOK;
CDROM_LOG((" = %04x %04x %04x %04x %04x\n", hirqreg, cr1, cr2, cr3, cr4))
status_type = 1;
break;
case 0x10: // Play Disc. FAD is in lowest 7 bits of cr1 and all of cr2.
uint32_t start_pos,end_pos;
uint8_t play_mode;
CDROM_LOG(("%s:CD: Play Disc\n", machine().describe_context()))
cd_stat = CD_STAT_PLAY;
play_mode = (cr3 >> 8) & 0x7f;
if (!(cr3 & 0x8000)) // preserve current position if bit 7 set
{
start_pos = ((cr1&0xff)<<16) | cr2;
end_pos = ((cr3&0xff)<<16) | cr4;
if (start_pos & 0x800000)
{
if (start_pos != 0xffffff)
cd_curfad = start_pos & 0xfffff;
logerror("fad mode\n");
cur_track = cdrom_get_track(cdrom, cd_curfad-150);
}
else
{
// track mode
if(((start_pos)>>8) != 0)
{
cur_track = (start_pos)>>8;
cd_fad_seek = cdrom_get_track_start(cdrom, cur_track-1);
cd_stat = CD_STAT_SEEK;
machine().device<cdda_device>("cdda")->pause_audio(0);
}
else
{
/* TODO: Waku Waku 7 sets up track 0, that basically doesn't make any sense. Just skip it for now. */
popmessage("Warning: track mode == 0, contact MAMEdev");
cr_standard_return(cd_stat);
hirqreg |= (CMOK);
return;
}
printf("track mode %d\n",cur_track);
}
if (end_pos & 0x800000)
{
if (end_pos != 0xffffff)
fadstoplay = end_pos & 0xfffff;
}
else
{
uint8_t end_track;
end_track = (end_pos)>>8;
fadstoplay = cdrom_get_track_start(cdrom, end_track) - cd_fad_seek;
}
}
else // play until the end of the disc
{
start_pos = ((cr1&0xff)<<16) | cr2;
end_pos = ((cr3&0xff)<<16) | cr4;
if(start_pos != 0xffffff)
{
/* Madou Monogatari sets 0xff80xxxx as end position, needs investigation ... */
if(end_pos & 0x800000)
fadstoplay = end_pos & 0xfffff;
else
{
if(end_pos == 0)
fadstoplay = (cdrom_get_track_start(cdrom, 0xaa)) - cd_curfad;
else
fadstoplay = (cdrom_get_track_start(cdrom, (end_pos & 0xff00) >> 8)) - cd_curfad;
}
logerror("track mode %08x %08x\n",cd_curfad,fadstoplay);
}
else
{
/* resume from a pause state */
/* TODO: Galaxy Fight calls 10ff ffff ffff ffff, but then it calls 0x04->0x02->0x06->0x11->0x04->0x02->0x06 command sequence
(and current implementation nukes start/end FAD addresses at 0x04). I'm sure that this doesn't work like this, but there could
be countless possible combinations ... */
if(fadstoplay == 0)
{
cd_curfad = cdrom_get_track_start(cdrom, cur_track-1);
fadstoplay = cdrom_get_track_start(cdrom, cur_track) - cd_curfad;
}
logerror("track resume %08x %08x\n",cd_curfad,fadstoplay);
}
}
CDROM_LOG(("CD: Play Disc: start %x length %x\n", cd_curfad, fadstoplay))
cr_standard_return(cd_stat);
hirqreg |= (CMOK);
oddframe = 0;
in_buffer = 0;
playtype = 0;
// cdda
if(cdrom_get_track_type(cdrom, cdrom_get_track(cdrom, cd_curfad)) == CD_TRACK_AUDIO)
{
machine().device<cdda_device>("cdda")->pause_audio(0);
//machine().device<cdda_device>("cdda")->start_audio(cd_curfad, fadstoplay);
//cdda_repeat_count = 0;
}
if(play_mode != 0x7f)
cdda_maxrepeat = play_mode & 0xf;
else
cdda_maxrepeat = 0;
cdda_repeat_count = 0;
status_type = 0;
break;
case 0x11: // disc seek
CDROM_LOG(("%s:CD: Disc seek\n", machine().describe_context()))
//printf("%08x %08x %08x %08x\n",cr1,cr2,cr3,cr4);
if (cr1 & 0x80)
{
temp = (cr1&0xff)<<16; // get FAD to seek to
temp |= cr2;
//cd_curfad = temp;
if (temp == 0xffffff)
{
cd_stat = CD_STAT_PAUSE;
machine().device<cdda_device>("cdda")->pause_audio(1);
}
else
{
cd_curfad = ((cr1&0x7f)<<16) | cr2;
printf("disc seek with params %04x %04x\n",cr1,cr2); //Area 51 sets this up
}
}
else
{
// is it a valid track?
if (cr2 >> 8)
{
cd_stat = CD_STAT_PAUSE;
cur_track = cr2>>8;;
cd_curfad = cdrom_get_track_start(cdrom, cur_track-1);
machine().device<cdda_device>("cdda")->pause_audio(1);
// (index is cr2 low byte)
}
else // error!
{
cd_stat = CD_STAT_STANDBY;
cd_curfad = 0xffffffff;
cur_track = 0xff;
machine().device<cdda_device>("cdda")->stop_audio(); //stop any pending CD-DA
}
}
hirqreg |= CMOK;
cr_standard_return(cd_stat);
status_type = 0;
break;
case 0x12: // FFWD / REW
//cr1 bit 0 determines if this is a Fast Forward (0) or a Rewind (1) command
// ...
break;
case 0x20: // Get SubCode Q / RW Channel
switch(cr1 & 0xff)
{
case 0: // Get Q
{
uint32_t msf_abs,msf_rel;
uint8_t track;
cr1 = cd_stat | 0;
cr2 = 10/2;
cr3 = 0;
cr4 = 0;
/*
Subcode Q info should be:
---- --x- S0
---- ---x S1
xxxx ---- [0] Control (bit 7 Pre-emphasis, bit 6: copy permitted, bit 5 undefined, bit 4 number of channels)
---- xxxx [0] address (0x0001 Mode 1)
xxxx xxxx [1] track number (1-99, AA lead-out), BCD format
xxxx xxxx [2] index (01 lead-out), BCD format
xxxx xxxx [3] Time within' track M
xxxx xxxx [4] Time within' track S
xxxx xxxx [5] Time within' track F
xxxx xxxx [6] Zero
xxxx xxxx [7] Absolute M
xxxx xxxx [8] Absolute S
xxxx xxxx [9] Absolute F
xxxx xxxx [10] CRCC
xxxx xxxx [11] CRCC
*/
msf_abs = lba_to_msf_alt( cd_curfad - 150 );
track = cdrom_get_track( cdrom, cd_curfad );
msf_rel = lba_to_msf_alt( cd_curfad - 150 - cdrom_get_track_start( cdrom, track ) );
xfertype = XFERTYPE_SUBQ;
xfercount = 0;
subqbuf[0] = 0x01 | ((cdrom_get_track_type(cdrom, cdrom_get_track(cdrom, track+1)) == CD_TRACK_AUDIO) ? 0x00 : 0x40);
subqbuf[1] = dec_2_bcd(track+1);
subqbuf[2] = dec_2_bcd(get_track_index(cd_curfad));
subqbuf[3] = dec_2_bcd((msf_rel >> 16) & 0xff);
subqbuf[4] = dec_2_bcd((msf_rel >> 8) & 0xff);
subqbuf[5] = dec_2_bcd((msf_rel >> 0) & 0xff);
subqbuf[6] = 0;
subqbuf[7] = dec_2_bcd((msf_abs >> 16) & 0xff);
subqbuf[8] = dec_2_bcd((msf_abs >> 8) & 0xff);
subqbuf[9] = dec_2_bcd((msf_abs >> 0) & 0xff);
}
break;
case 1: // Get RW
cr1 = cd_stat | 0;
cr2 = 12;
cr3 = 0;
cr4 = 0;
xfertype = XFERTYPE_SUBRW;
xfercount = 0;
/* return null data for now */
{
int i;
for(i=0;i<12*2;i++)
subrwbuf[i] = 0;
}
break;
}
hirqreg |= CMOK|DRDY;
status_type = 0;
break;
case 0x30: // Set CD Device connection
{
uint8_t parm;
// get operation
parm = cr3>>8;
CDROM_LOG(("%s:CD: Set CD Device Connection filter # %x\n", machine().describe_context(), parm))
cddevicenum = parm;
if (parm == 0xff)
{
cddevice = (filterT *)nullptr;
}
else
{
if (parm < 0x24)
{
cddevice = &filters[(cr3>>8)];
}
}
hirqreg |= (CMOK|ESEL);
cr_standard_return(cd_stat);
status_type = 0;
}
break;
case 0x31:
popmessage("Get CD Device Connection, contact MAMEdev");
hirqreg |= CMOK;
break;
case 0x32: // Last Buffer Destination
cr1 = cd_stat | 0;
cr2 = 0;
cr3 = lastbuf << 8;
cr4 = 0;
hirqreg |= (CMOK);
status_type = 0;
break;
case 0x40: // Set Filter Range
// cr1 low + cr2 = FAD0, cr3 low + cr4 = FAD1
// cr3 hi = filter num.
{
uint8_t fnum = (cr3>>8)&0xff;
CDROM_LOG(("%s:CD: Set Filter Range\n", machine().describe_context()))
filters[fnum].fad = ((cr1 & 0xff)<<16) | cr2;
filters[fnum].range = ((cr3 & 0xff)<<16) | cr4;
printf("%08x %08x %d\n",filters[fnum].fad,filters[fnum].range,fnum);
hirqreg |= (CMOK|ESEL);
cr_standard_return(cd_stat);
status_type = 0;
}
break;
case 0x41:
popmessage("Get Filter Range, contact MAMEdev");
hirqreg |= CMOK;
break;
case 0x42: // Set Filter Subheader conditions
{
uint8_t fnum = (cr3>>8)&0xff;
CDROM_LOG(("%s:CD: Set Filter Subheader conditions %x => chan %x masks %x fid %x vals %x\n", machine().describe_context(), fnum, cr1&0xff, cr2, cr3&0xff, cr4))
filters[fnum].chan = cr1 & 0xff;
filters[fnum].smmask = (cr2>>8)&0xff;
filters[fnum].cimask = cr2&0xff;
filters[fnum].fid = cr3&0xff;
filters[fnum].smval = (cr4>>8)&0xff;
filters[fnum].cival = cr4&0xff;
hirqreg |= (CMOK|ESEL);
cr_standard_return(cd_stat);
status_type = 0;
}
break;
case 0x43: // Get Filter Subheader conditions
{
uint8_t fnum = (cr3>>8)&0xff;
CDROM_LOG(("%s:CD: Set Filter Subheader conditions %x => chan %x masks %x fid %x vals %x\n", machine().describe_context(), fnum, cr1&0xff, cr2, cr3&0xff, cr4))
cr1 = cd_stat | (filters[fnum].chan & 0xff);
cr2 = (filters[fnum].smmask << 8) | (filters[fnum].cimask & 0xff);
cr3 = filters[fnum].fid;
cr4 = (filters[fnum].smval << 8) | (filters[fnum].cival & 0xff);
hirqreg |= (CMOK|ESEL);
status_type = 0;
}
break;
case 0x44: // Set Filter Mode
{
uint8_t fnum = (cr3>>8)&0xff;
uint8_t mode = (cr1 & 0xff);
// initialize filter?
if (mode & 0x80)
{
memset(&filters[fnum], 0, sizeof(filterT));
}
else
{
filters[fnum].mode = mode;
}
CDROM_LOG(("%s:CD: Set Filter Mode filt %x mode %x\n", machine().describe_context(), fnum, mode))
hirqreg |= (CMOK|ESEL);
cr_standard_return(cd_stat);
status_type = 0;
}
break;
case 0x45: // Get Filter Mode
{
uint8_t fnum = (cr3>>8)&0xff;
cr1 = cd_stat | (filters[fnum].mode & 0xff);
cr2 = 0;
cr3 = 0;
cr4 = 0;
hirqreg |= (CMOK|ESEL);
status_type = 0;
}
break;
case 0x46: // Set Filter Connection
{
/* TODO: maybe condition false is cr3 low? */
uint8_t fnum = (cr3>>8)&0xff;
CDROM_LOG(("%s:CD: Set Filter Connection %x => mode %x parm %04x\n", machine().describe_context(), fnum, cr1 & 0xf, cr2))
if (cr1 & 1) // set true condition
filters[fnum].condtrue = (cr2>>8)&0xff;
if (cr1 & 2) // set false condition
filters[fnum].condfalse = cr2&0xff;
hirqreg |= (CMOK|ESEL);
cr_standard_return(cd_stat);
status_type = 0;
}
break;
case 0x48: // Reset Selector
{
int i,j;
CDROM_LOG(("%s:CD: Reset Selector\n", machine().describe_context()))
if((cr1 & 0xff) == 0x00)
{
uint8_t bufnum = cr3>>8;
if(bufnum < MAX_FILTERS)
{
for (i = 0; i < MAX_BLOCKS; i++)
{
cd_free_block(partitions[bufnum].blocks[i]);
partitions[bufnum].blocks[i] = (blockT *)nullptr;
partitions[bufnum].bnum[i] = 0xff;
}
partitions[bufnum].size = -1;
partitions[bufnum].numblks = 0;
}
// TODO: buffer full flag
if (freeblocks == 200) { sectorstore = 0; }
hirqreg |= (CMOK|ESEL);
cr_standard_return(cd_stat);
status_type = 0;
return;
}
/* reset false filter output conditions */
/* TODO: check these two. */
if(cr1 & 0x80)
{
for(i=0;i<MAX_FILTERS;i++)
filters[i].condfalse = 0;
}
/* reset true filter output conditions */
if(cr1 & 0x40)
{
for(i=0;i<MAX_FILTERS;i++)
filters[i].condtrue = 0;
}
/* reset filter conditions*/
if(cr1 & 0x10)
{
for(i=0;i<MAX_FILTERS;i++)
{
filters[i].fad = 0;
filters[i].range = 0xffffffff;
filters[i].mode = 0;
filters[i].chan = 0;
filters[i].smmask = 0;
filters[i].cimask = 0;
filters[i].fid = 0;
filters[i].smval = 0;
filters[i].cival = 0;
}
}
/* reset partition buffer data */
if(cr1 & 0x4)
{
for(i=0;i<MAX_FILTERS;i++)
{
for (j = 0; j < MAX_BLOCKS; j++)
{
cd_free_block(partitions[i].blocks[j]);
partitions[i].blocks[j] = (blockT *)nullptr;
partitions[i].bnum[j] = 0xff;
}
partitions[i].size = -1;
partitions[i].numblks = 0;
}
buffull = sectorstore = 0;
}
hirqreg |= (CMOK|ESEL);
cr_standard_return(cd_stat);
status_type = 0;
}
break;
case 0x50: // get Buffer Size
cr1 = cd_stat;
cr2 = (freeblocks > 200) ? 200 : freeblocks;
cr3 = 0x1800;
cr4 = 200;
CDROM_LOG(("CD: Get Buffer Size = %d\n", cr2))
hirqreg |= (CMOK);
status_type = 0;
break;
case 0x51: // get # sectors used in a buffer
{
uint32_t bufnum = cr3>>8;
CDROM_LOG(("%s:CD: Get Sector Number (bufno %d) = %d blocks\n", machine().describe_context(), bufnum, cr4))
cr1 = cd_stat;
cr2 = 0;
cr3 = 0;
if(cr1 & 0xff || cr2 || cr3 & 0xff || cr4)
printf("Get # sectors used with params %04x %04x %04x %04x\n",cr1,cr2,cr3,cr4);
// is the partition empty?
if (partitions[bufnum].size == -1)
{
cr4 = 0;
}
else
{
cr4 = partitions[bufnum].numblks;
//printf("Partition %08x %04x\n",bufnum,cr4);
}
//printf("%04x\n",cr4);
if(cr4 == 0)
hirqreg |= (CMOK);
else
hirqreg |= (CMOK|DRDY);
status_type = 1;
}
break;
case 0x52: // calculate actual size
{
uint32_t bufnum = cr3>>8;
uint32_t sectoffs = cr2;
uint32_t numsect = cr4;
CDROM_LOG(("%s:CD: Calculate actual size: buf %x offs %x numsect %x\n", machine().describe_context(), bufnum, sectoffs, numsect))
calcsize = 0;
if (partitions[bufnum].size != -1)
{
int32_t i;
for (i = 0; i < numsect; i++)
{
if (partitions[bufnum].blocks[sectoffs+i])
{
calcsize += (partitions[bufnum].blocks[sectoffs+i]->size / 2);
}
}
}
hirqreg |= (CMOK|ESEL);
cr_standard_return(cd_stat);
status_type = 0;
}
break;
case 0x53: // get actual block size
CDROM_LOG(("%s:CD: Get actual block size\n", machine().describe_context()))
cr1 = cd_stat | ((calcsize>>16)&0xff);
cr2 = (calcsize & 0xffff);
cr3 = 0;
cr4 = 0;
hirqreg |= (CMOK|ESEL);
status_type = 1;
break;
case 0x54: // get sector info
{
uint32_t sectoffs = cr2 & 0xff;
uint32_t bufnum = cr3>>8;
if (bufnum >= MAX_FILTERS || !partitions[bufnum].blocks[sectoffs])
{
cr1 |= CD_STAT_REJECT & 0xff00;
hirqreg |= (CMOK|ESEL);
printf("Get sector info reject\n");
}
else
{
cr1 = cd_stat | ((partitions[bufnum].blocks[sectoffs]->FAD >> 16) & 0xff);
cr2 = partitions[bufnum].blocks[sectoffs]->FAD & 0xffff;
cr3 = ((partitions[bufnum].blocks[sectoffs]->fnum & 0xff) << 8) | (partitions[bufnum].blocks[sectoffs]->chan & 0xff);
cr4 = ((partitions[bufnum].blocks[sectoffs]->subm & 0xff) << 8) | (partitions[bufnum].blocks[sectoffs]->cinf & 0xff);
hirqreg |= (CMOK|ESEL);
}
status_type = 0;
}
break;
case 0x60: // set sector length
CDROM_LOG(("%s:CD: Set sector length\n", machine().describe_context()))
switch (cr1 & 0xff)
{
case 0:
sectlenin = 2048;
break;
case 1:
sectlenin = 2336;
break;
case 2:
sectlenin = 2340;
break;
case 3:
sectlenin = 2352;
break;
}
switch ((cr2>>8) & 0xff)
{
case 0:
sectlenout = 2048;
break;
case 1:
sectlenout = 2336;
break;
case 2:
sectlenout = 2340;
break;
case 3:
sectlenout = 2352;
break;
}
hirqreg |= (CMOK|ESEL);
cr_standard_return(cd_stat);
status_type = 0;
break;
case 0x61: // get sector data
{
uint32_t sectnum = cr4;
uint32_t sectofs = cr2;
uint32_t bufnum = cr3>>8;
CDROM_LOG(("%s:CD: Get sector data (SN %d SO %d BN %d)\n", machine().describe_context(), sectnum, sectofs, bufnum))
if (bufnum >= MAX_FILTERS)
{
printf("CD: invalid buffer number\n");
/* TODO: why this is happening? */
cr_standard_return(CD_STAT_REJECT);
hirqreg |= (CMOK|EHST);
return;
}
if (partitions[bufnum].numblks < sectnum)
{
printf("CD: buffer is not full %08x %08x\n",partitions[bufnum].numblks,sectnum);
cr_standard_return(CD_STAT_REJECT);
hirqreg |= (CMOK|EHST);
return;
}
cd_getsectoroffsetnum(bufnum, &sectofs, &sectnum);
xfertype32 = XFERTYPE32_GETSECTOR;
xferoffs = 0;
xfersect = 0;
xferdnum = 0;
xfersectpos = sectofs;
xfersectnum = sectnum;
transpart = &partitions[bufnum];
cd_stat |= CD_STAT_TRANS;
cr_standard_return(cd_stat);
hirqreg |= (CMOK|EHST|DRDY);
status_type = 0;
}
break;
case 0x62: // delete sector data
{
uint32_t sectnum = cr4;
uint32_t sectofs = cr2;
uint32_t bufnum = cr3>>8;
int32_t i;
CDROM_LOG(("%s:CD: Delete sector data (SN %d SO %d BN %d)\n", machine().describe_context(), sectnum, sectofs, bufnum))
if (bufnum >= MAX_FILTERS)
{
printf("CD: invalid buffer number\n");
/* TODO: why this is happening? */
cr_standard_return(CD_STAT_REJECT);
hirqreg |= (CMOK|EHST);
return;
}
/* TODO: Phantasy Star 2 throws this one. */
if (partitions[bufnum].numblks == 0)
{
printf("CD: buffer is already empty\n");
cr_standard_return(CD_STAT_REJECT);
hirqreg |= (CMOK|EHST);
return;
}
cd_getsectoroffsetnum(bufnum, &sectofs, &sectnum);
for (i = sectofs; i < (sectofs + sectnum); i++)
{
partitions[bufnum].size -= partitions[bufnum].blocks[i]->size;
cd_free_block(partitions[bufnum].blocks[i]);
partitions[bufnum].blocks[i] = (blockT *)nullptr;
partitions[bufnum].bnum[i] = 0xff;
}
cd_defragblocks(&partitions[bufnum]);
partitions[bufnum].numblks -= sectnum;
if (freeblocks == 200)
{
sectorstore = 0;
}
cd_stat &= ~CD_STAT_TRANS;
cr_standard_return(cd_stat);
hirqreg |= (CMOK|EHST);
status_type = 0;
}
break;
case 0x63: // get then delete sector data
{
uint32_t sectnum = cr4;
uint32_t sectofs = cr2;
uint32_t bufnum = cr3>>8;
CDROM_LOG(("%s:CD: Get and delete sector data (SN %d SO %d BN %d)\n", machine().describe_context(), sectnum, sectofs, bufnum))
if (bufnum >= MAX_FILTERS)
{
printf("CD: invalid buffer number\n");
/* TODO: why this is happening? */
cr_standard_return(CD_STAT_REJECT);
hirqreg |= (CMOK|EHST);
return;
}
/* Yoshimoto Mahjong uses the REJECT status to verify when the data is ready. */
if (partitions[bufnum].numblks < sectnum)
{
printf("CD: buffer is not full %08x %08x\n",partitions[bufnum].numblks,sectnum);
cr_standard_return(CD_STAT_REJECT);
hirqreg |= (CMOK|EHST);
return;
}
cd_getsectoroffsetnum(bufnum, &sectofs, &sectnum);
xfertype32 = XFERTYPE32_GETDELETESECTOR;
xferoffs = 0;
xfersect = 0;
xferdnum = 0;
xfersectpos = sectofs;
xfersectnum = sectnum;
transpart = &partitions[bufnum];
cd_stat |= CD_STAT_TRANS;
cr_standard_return(cd_stat);
hirqreg |= (CMOK|EHST|DRDY);
status_type = 0;
}
break;
case 0x64: // put sector data
/* After Burner 2, Out Run, Fantasy Zone and Dungeon Master Nexus trips this */
{
uint32_t sectnum = cr4 & 0xff;
uint32_t sectofs = cr2;
uint32_t bufnum = cr3>>8;
xfertype32 = XFERTYPE32_PUTSECTOR;
/*TODO: eventual errors? */
cd_getsectoroffsetnum(bufnum, &sectofs, &sectnum);
cd_stat |= CD_STAT_TRANS;
xferoffs = 0;
xfersect = 0;
xferdnum = 0;
xfersectpos = sectofs;
xfersectnum = sectnum;
transpart = &partitions[bufnum];
// allocate the blocks
for (int i = xfersectpos; i < xfersectpos+xfersectnum; i++)
{
transpart->blocks[i] = cd_alloc_block(&transpart->bnum[i]);
if(transpart->size == -1)
transpart->size = 0;
transpart->size += transpart->blocks[i]->size;
transpart->numblks++;
}
}
hirqreg |= (CMOK|DRDY);
cr_standard_return(cd_stat);
status_type = 0;
break;
case 0x65:
popmessage("Move Sector data, contact MAMEdev");
hirqreg |= (CMOK);
break;
case 0x66: // copy sector data
/* TODO: Sword & Sorcery / Riglord Saga 2 */
{
uint32_t src_filter = (cr3>>8)&0xff;
uint32_t dst_filter = cr1&0xff;
uint32_t sectnum = cr4 & 0xff;
//cd_stat |= CD_STAT_TRANS;
//transpart = &partitions[dst_filter];
for (int i = 0; i < sectnum; i++)
{
// allocate the dst blocks
partitions[dst_filter].blocks[i] = cd_alloc_block(&partitions[dst_filter].bnum[i]);
if(partitions[dst_filter].size == -1)
partitions[dst_filter].size = 0;
partitions[dst_filter].size += partitions[dst_filter].blocks[i]->size;
partitions[dst_filter].numblks++;
//copy data
for(int j = 0; j < sectlenin; j++)
partitions[dst_filter].blocks[i]->data[j] = partitions[src_filter].blocks[i]->data[j];
//deallocate the src blocks
//partitions[src_filter].size -= partitions[src_filter].blocks[i]->size;
//cd_free_block(partitions[src_filter].blocks[i]);
//partitions[src_filter].blocks[i] = (blockT *)nullptr;
//partitions[src_filter].bnum[i] = 0xff;
}
}
hirqreg |= (CMOK|ECPY);
cr_standard_return(cd_stat);
status_type = 0;
break;
case 0x67: // get copy error
CDROM_LOG(("%s:CD: Get copy error\n", machine().describe_context()))
logerror("Get copy error\n");
cr1 = cd_stat;
cr2 = 0;
cr3 = 0;
cr4 = 0;
hirqreg |= (CMOK);
status_type = 0;
break;
case 0x70: // change directory
CDROM_LOG(("%s:CD: Change Directory\n", machine().describe_context()))
hirqreg |= (CMOK|EFLS);
temp = (cr3&0xff)<<16;
temp |= cr4;
read_new_dir(temp);
cr_standard_return(cd_stat);
status_type = 0;
break;
case 0x71: // Read directory entry
CDROM_LOG(("%s:CD: Read Directory Entry\n", machine().describe_context()))
// uint32_t read_dir;
// read_dir = ((cr3&0xff)<<16)|cr4;
if((cr3 >> 8) < 0x24)
cddevice = &filters[cr3 >> 8];
else
cddevice = (filterT *)nullptr;
/* TODO: */
//read_new_dir(read_dir - 2);
cr_standard_return(cd_stat);
hirqreg |= (CMOK|EFLS);
status_type = 0;
break;
case 0x72: // Get file system scope
CDROM_LOG(("CD: Get file system scope\n"))
hirqreg |= (CMOK|EFLS);
cr1 = cd_stat;
cr2 = numfiles; // # of files in directory
cr3 = 0x0100; // report directory held
cr4 = firstfile; // first file id
printf("%04x %04x %04x %04x\n",cr1,cr2,cr3,cr4);
status_type = 0;
break;
case 0x73: // Get File Info
CDROM_LOG(("%s:CD: Get File Info\n", machine().describe_context()))
cd_stat |= CD_STAT_TRANS;
cd_stat &= 0xff00; // clear top byte of return value
playtype = 0;
cdda_repeat_count = 0;
hirqreg |= (CMOK|DRDY);
temp = (cr3&0xff)<<16;
temp |= cr4;
if (temp == 0xffffff) // special
{
xfertype = XFERTYPE_FILEINFO_254;
xfercount = 0;
cr1 = cd_stat;
cr2 = 0x5f4;
cr3 = 0;
cr4 = 0;
}
else
{
cr1 = cd_stat;
cr2 = 6; // 6 words for single file
// first 4 bytes = FAD address
// second 4 bytes = length
// last 4 bytes:
// - unit size
// - gap size
// - file #
// attributes flags
cr3 = 0;
cr4 = 0;
printf("%08x %08x\n",curdir[temp].firstfad,curdir[temp].length);
// first 4 bytes = FAD
finfbuf[0] = (curdir[temp].firstfad>>24)&0xff;
finfbuf[1] = (curdir[temp].firstfad>>16)&0xff;
finfbuf[2] = (curdir[temp].firstfad>>8)&0xff;
finfbuf[3] = (curdir[temp].firstfad&0xff);
// second 4 bytes = length of file
finfbuf[4] = (curdir[temp].length>>24)&0xff;
finfbuf[5] = (curdir[temp].length>>16)&0xff;
finfbuf[6] = (curdir[temp].length>>8)&0xff;
finfbuf[7] = (curdir[temp].length&0xff);
finfbuf[8] = curdir[temp].interleave_gap_size;
finfbuf[9] = curdir[temp].file_unit_size;
finfbuf[10] = temp;
finfbuf[11] = curdir[temp].flags;
xfertype = XFERTYPE_FILEINFO_1;
xfercount = 0;
}
CDROM_LOG((" = %04x %04x %04x %04x %04x\n", hirqreg, cr1, cr2, cr3, cr4))
status_type = 0;
break;
case 0x74: // Read File
CDROM_LOG(("%s:CD: Read File\n", machine().describe_context()))
uint16_t file_offset,file_filter,file_id,file_size;
file_offset = ((cr1 & 0xff)<<8)|(cr2 & 0xff); /* correct? */
file_filter = cr3 >> 8;
file_id = ((cr3 & 0xff) << 16)|(cr4);
file_size = ((curdir[file_id].length + sectlenin - 1) / sectlenin) - file_offset;
cd_stat = CD_STAT_PLAY|0x80; // set "cd-rom" bit
cd_curfad = (curdir[file_id].firstfad + file_offset);
fadstoplay = file_size;
if(file_filter < 0x24)
cddevice = &filters[file_filter];
else
cddevice = (filterT *)nullptr;
printf("Read file %08x (%08x %08x) %02x %d\n",curdir[file_id].firstfad,cd_curfad,fadstoplay,file_filter,sectlenin);
cr_standard_return(cd_stat);
oddframe = 0;
in_buffer = 0;
playtype = 1;
hirqreg |= (CMOK|EHST);
status_type = 0;
break;
case 0x75:
CDROM_LOG(("%s:CD: Abort File\n", machine().describe_context()))
// bios expects "2bc" mask to work against this
hirqreg |= (CMOK|EFLS);
sectorstore = 0;
xfertype32 = XFERTYPE32_INVALID;
xferdnum = 0;
if(((cd_stat & 0x0f00) != CD_STAT_NODISC) && ((cd_stat & 0x0f00) != CD_STAT_OPEN))
cd_stat = CD_STAT_PAUSE; // force to pause
cr_standard_return(cd_stat);
status_type = 0;
break;
case 0xe0: // appears to be copy protection check. needs only to return OK.
CDROM_LOG(("%s:CD: Verify copy protection\n", machine().describe_context()))
if(((cd_stat & 0x0f00) != CD_STAT_NODISC) && ((cd_stat & 0x0f00) != CD_STAT_OPEN))
cd_stat = CD_STAT_PAUSE;
// cr1 = cd_stat; // necessary to pass
// cr2 = 0x4;
// hirqreg |= (CMOK|EFLS|CSCT);
if(cr2 == 0x0001) // MPEG card
{
hirqreg |= (CMOK|MPED);
}
else
{
sectorstore = 1;
hirqreg = 0x7c5;
}
cr_standard_return(cd_stat);
status_type = 0;
break;
case 0xe1: // get disc region
CDROM_LOG(("%s:CD: Get disc region\n", machine().describe_context()))
if(cd_stat != CD_STAT_NODISC && cd_stat != CD_STAT_OPEN)
cd_stat = CD_STAT_PAUSE;
cr1 = cd_stat; // necessary to pass
if(cr2 == 0x0001) // MPEG card
cr2 = 0x2;
else
cr2 = 0x4; // 0 = No CD, 1 = Audio CD, 2 Regular Data disk (not Saturn), 3 pirate disc, 4 Saturn disc
cr3 = 0;
cr4 = 0;
hirqreg |= (CMOK);
// cr_standard_return(cd_stat);
status_type = 0;
break;
// following are MPEG commands, enough to get Sport Fishing to do something
// MPEG Get Status
case 0x90:
// MPEG Set IRQ Mask
case 0x92:
// MPEG Set Mode
case 0x94:
mpeg_standard_return(cd_stat);
hirqreg |= (CMOK);
break;
// MPEG get IRQ
case 0x91:
cr1 = cd_stat | 0;
cr2 = 5;
cr3 = 0;
cr4 = 0;
hirqreg |= (CMOK);
break;
// MPEG init
case 0x93:
hirqreg |= (CMOK|MPED);
if(cr2 == 0x0001)
hirqreg |= (MPCM);
cr1 = cd_stat;
cr2 = 0;
cr3 = 0;
cr4 = 0;
break;
default:
CDROM_LOG(("CD: Unknown command %04x\n", cr1>>8))
popmessage("CD Block unknown command %02x, contact MAMEdev",cr1>>8);
hirqreg |= (CMOK);
break;
}
if(status_type == 1)
{
prev_cr1 = cr1;
prev_cr2 = cr2;
prev_cr3 = cr3;
prev_cr4 = cr4;
}
}
TIMER_DEVICE_CALLBACK_MEMBER( saturn_state::stv_sh1_sim )
{
if((cmd_pending == 0xf) && (!(hirqreg & CMOK)))
cd_exec_command();
}
TIMER_DEVICE_CALLBACK_MEMBER( saturn_state::stv_sector_cb )
{
//sector_timer->reset();
//popmessage("%08x %08x %d %d",cd_curfad,fadstoplay,cmd_pending,cd_speed);
cd_playdata();
if(cdrom_get_track_type(cdrom, cdrom_get_track(cdrom, cd_curfad)) == CD_TRACK_AUDIO)
sector_timer->adjust(attotime::from_hz(75)); // 75 sectors / second = 150kBytes/second (cdda track ignores cd_speed setting)
else
sector_timer->adjust(attotime::from_hz(75*cd_speed)); // 75 / 150 sectors / second = 150 / 300kBytes/second
/* TODO: doesn't boot if a disk isn't in? */
/* TODO: Check out when this really happens. (Daytona USA original version definitely wants it to be on).*/
//if(((cd_stat & 0x0f00) != CD_STAT_NODISC) && ((cd_stat & 0x0f00) != CD_STAT_OPEN))
hirqreg |= SCDQ;
if(cd_stat & CD_STAT_PERI)
{
cr_standard_return(cd_stat);
}
}
// global functions
void saturn_state::stvcd_reset( void )
{
int32_t i, j;
hirqmask = 0xffff;
hirqreg = 0xffff;
cr1 = 'C';
cr2 = ('D'<<8) | 'B';
cr3 = ('L'<<8) | 'O';
cr4 = ('C'<<8) | 'K';
cd_stat = CD_STAT_PAUSE;
cd_stat |= CD_STAT_PERI;
cur_track = 0xff;
curdir.clear();
xfertype = XFERTYPE_INVALID;
xfertype32 = XFERTYPE32_INVALID;
// reset flag vars
buffull = sectorstore = 0;
freeblocks = 200;
sectlenin = sectlenout = 2048;
lastbuf = 0xff;
// reset buffer partitions
for (i = 0; i < MAX_FILTERS; i++)
{
partitions[i].size = -1;
partitions[i].numblks = 0;
for (j = 0; j < MAX_BLOCKS; j++)
{
partitions[i].blocks[j] = (blockT *)nullptr;
partitions[i].bnum[j] = 0xff;
}
}
// reset blocks
for (i = 0; i < MAX_BLOCKS; i++)
{
blocks[i].size = -1;
memset(&blocks[i].data, 0, CD_MAX_SECTOR_DATA);
}
// open device
//if (cdrom)
{
//cdrom_close(cdrom);
cdrom = (cdrom_file *)nullptr;
}
cdrom_image_device *cddevice = machine().device<cdrom_image_device>("cdrom");
if (cddevice!=nullptr)
{
// MESS case
cdrom = cddevice->get_cdrom_file();
}
else
{
// MAME case
cdrom = cdrom_open(machine().rom_load().get_disk_handle(":cdrom"));
}
machine().device<cdda_device>("cdda")->set_cdrom(cdrom);
if (cdrom)
{
CDROM_LOG(("Opened CD-ROM successfully, reading root directory\n"))
read_new_dir(0xffffff); // read root directory
}
else
{
cd_stat = CD_STAT_NODISC;
}
cd_speed = 2;
cdda_repeat_count = 0;
tray_is_closed = 1;
sector_timer = machine().device<timer_device>("sector_timer");
sector_timer->adjust(attotime::from_hz(150)); // 150 sectors / second = 300kBytes/second
sh1_timer = machine().device<timer_device>("sh1_cmd");
}
saturn_state::blockT *saturn_state::cd_alloc_block(uint8_t *blknum)
{
int32_t i;
// search the 200 available blocks for a free one
for (i = 0; i < 200; i++)
{
if (blocks[i].size == -1)
{
freeblocks--;
if (freeblocks <= 0)
{
buffull = 1;
printf("buffull in cd_alloc_block\n");
}
blocks[i].size = sectlenin;
*blknum = i;
CDROM_LOG(("CD: allocating block %d, size %x\n", i, sectlenin))
return &blocks[i];
}
}
buffull = 1;
return (blockT *)nullptr;
}
void saturn_state::cd_free_block(blockT *blktofree)
{
int32_t i;
CDROM_LOG(("cd_free_block: %x\n", (uint32_t)(uintptr_t)blktofree))
if(blktofree == nullptr)
{
return;
}
for (i = 0; i < 200; i++)
{
if (&blocks[i] == blktofree)
{
CDROM_LOG(("CD: freeing block %d\n", i))
}
}
blktofree->size = -1;
freeblocks++;
buffull = 0;
hirqreg &= ~BFUL;
}
void saturn_state::cd_getsectoroffsetnum(uint32_t bufnum, uint32_t *sectoffs, uint32_t *sectnum)
{
if (*sectoffs == 0xffff)
{
// last sector
printf("CD: Don't know how to handle offset ffff\n");
}
else if (*sectnum == 0xffff)
{
*sectnum = partitions[bufnum].numblks - *sectoffs;
}
}
void saturn_state::cd_defragblocks(partitionT *part)
{
uint32_t i, j;
blockT *temp;
uint8_t temp2;
for (i = 0; i < (MAX_BLOCKS-1); i++)
{
for (j = i+1; j < MAX_BLOCKS; j++)
{
if ((part->blocks[i] == (blockT *)nullptr) && (part->blocks[j] != (blockT *)nullptr))
{
temp = part->blocks[i];
part->blocks[i] = part->blocks[j];
part->blocks[j] = temp;
temp2 = part->bnum[i];
part->bnum[i] = part->bnum[j];
part->bnum[j] = temp2;
}
}
}
}
uint16_t saturn_state::cd_readWord(uint32_t addr)
{
uint16_t rv;
switch (addr & 0xffff)
{
case 0x0008: // read HIRQ register
case 0x000a:
case 0x8008:
case 0x800a:
rv = hirqreg;
rv &= ~DCHG; // always clear bit 6 (tray open)
if (buffull) rv |= BFUL; else rv &= ~BFUL;
if (sectorstore) rv |= CSCT; else rv &= ~CSCT;
hirqreg = rv;
// CDROM_LOG(("RW HIRQ: %04x\n", rv))
return rv;
case 0x000c:
case 0x000e:
case 0x800c:
case 0x800e:
// CDROM_LOG(("RW HIRM: %04x\n", hirqmask))
printf("RW HIRM: %04x\n", hirqmask);
return hirqmask;
case 0x0018:
case 0x001a:
case 0x8018:
case 0x801a:
// CDROM_LOG(("RW CR1: %04x\n", cr1))
return cr1;
case 0x001c:
case 0x001e:
case 0x801c:
case 0x801e:
// CDROM_LOG(("RW CR2: %04x\n", cr2))
return cr2;
case 0x0020:
case 0x0022:
case 0x8020:
case 0x8022:
// CDROM_LOG(("RW CR3: %04x\n", cr3))
return cr3;
case 0x0024:
case 0x0026:
case 0x8024:
case 0x8026:
// CDROM_LOG(("RW CR4: %04x\n", cr4))
//popmessage("%04x %04x %04x %04x",cr1,cr2,cr3,cr4);
cmd_pending = 0;
cd_stat |= CD_STAT_PERI;
return cr4;
case 0x8000:
rv = 0xffff;
switch (xfertype)
{
case XFERTYPE_TOC:
rv = tocbuf[xfercount]<<8 | tocbuf[xfercount+1];
xfercount += 2;
xferdnum += 2;
if (xfercount > 102*4)
{
xfercount = 0;
xfertype = XFERTYPE_INVALID;
}
break;
case XFERTYPE_FILEINFO_1:
rv = finfbuf[xfercount]<<8 | finfbuf[xfercount+1];
xfercount += 2;
xferdnum += 2;
if (xfercount > 6*2)
{
xfercount = 0;
xfertype = XFERTYPE_INVALID;
}
break;
case XFERTYPE_FILEINFO_254: // Lunar 2
if((xfercount % (6 * 2)) == 0)
{
uint32_t temp = 2 + (xfercount / (0x6 * 2));
// first 4 bytes = FAD
finfbuf[0] = (curdir[temp].firstfad>>24)&0xff;
finfbuf[1] = (curdir[temp].firstfad>>16)&0xff;
finfbuf[2] = (curdir[temp].firstfad>>8)&0xff;
finfbuf[3] = (curdir[temp].firstfad&0xff);
// second 4 bytes = length of file
finfbuf[4] = (curdir[temp].length>>24)&0xff;
finfbuf[5] = (curdir[temp].length>>16)&0xff;
finfbuf[6] = (curdir[temp].length>>8)&0xff;
finfbuf[7] = (curdir[temp].length&0xff);
finfbuf[8] = curdir[temp].interleave_gap_size;
finfbuf[9] = curdir[temp].file_unit_size;
finfbuf[10] = temp;
finfbuf[11] = curdir[temp].flags;
}
rv = finfbuf[xfercount % (6 * 2)]<<8 | finfbuf[(xfercount % (6 * 2)) +1];
xfercount += 2;
xferdnum += 2;
if (xfercount > (254 * 6 * 2))
{
xfercount = 0;
xfertype = XFERTYPE_INVALID;
}
break;
case XFERTYPE_SUBQ:
rv = subqbuf[xfercount]<<8 | subqbuf[xfercount+1];
xfercount += 2;
xferdnum += 2;
if (xfercount > 5*2)
{
xfercount = 0;
xfertype = XFERTYPE_INVALID;
}
break;
case XFERTYPE_SUBRW:
rv = subrwbuf[xfercount]<<8 | subrwbuf[xfercount+1];
xfercount += 2;
xferdnum += 2;
if (xfercount > 12*2)
{
xfercount = 0;
xfertype = XFERTYPE_INVALID;
}
break;
default:
printf("STVCD: Unhandled xfer type %d\n", (int)xfertype);
rv = 0;
break;
}
return rv;
default:
CDROM_LOG(("CD: RW %08x\n", addr))
return 0xffff;
}
}
uint32_t saturn_state::cd_readLong(uint32_t addr)
{
uint32_t rv = 0;
switch (addr & 0xffff)
{
case 0x8000:
switch (xfertype32)
{
case XFERTYPE32_GETSECTOR:
case XFERTYPE32_GETDELETESECTOR:
// make sure we have sectors left
if (xfersect < xfersectnum)
{
// get next longword
rv = (transpart->blocks[xfersectpos+xfersect]->data[xferoffs + 0]<<24) |
(transpart->blocks[xfersectpos+xfersect]->data[xferoffs + 1]<<16) |
(transpart->blocks[xfersectpos+xfersect]->data[xferoffs + 2]<<8) |
(transpart->blocks[xfersectpos+xfersect]->data[xferoffs + 3]<<0);
xferdnum += 4;
xferoffs += 4;
// did we run out of sector?
if (xferoffs >= transpart->blocks[xfersect]->size)
{
CDROM_LOG(("CD: finished xfer of block %d of %d\n", xfersect+1, xfersectnum))
xferoffs = 0;
xfersect++;
}
}
else // sectors are done, kill 'em all if we can
{
if (xfertype32 == XFERTYPE32_GETDELETESECTOR)
{
int32_t i;
CDROM_LOG(("Killing sectors in done\n"))
// deallocate the blocks
for (i = xfersectpos; i < xfersectpos+xfersectnum; i++)
{
cd_free_block(transpart->blocks[i]);
transpart->blocks[i] = (blockT *)nullptr;
transpart->bnum[i] = 0xff;
}
// defrag what's left
cd_defragblocks(transpart);
// clean up our state
transpart->size -= xferdnum;
transpart->numblks -= xfersectnum;
/* TODO: is this correct? */
xfertype32 = XFERTYPE32_INVALID;
}
}
break;
default:
printf("CD: unhandled 32-bit transfer type\n");
break;
}
return rv;
default:
CDROM_LOG(("CD: RL %08x\n", addr))
return 0xffff;
}
}
void saturn_state::cd_writeLong(uint32_t addr, uint32_t data)
{
switch (addr & 0xffff)
{
case 0x8000:
switch (xfertype32)
{
case XFERTYPE32_PUTSECTOR:
// make sure we have sectors left
if (xfersect < xfersectnum)
{
// get next longword
transpart->blocks[xfersectpos+xfersect]->data[xferoffs + 0] = (data >> 24) & 0xff;
transpart->blocks[xfersectpos+xfersect]->data[xferoffs + 1] = (data >> 16) & 0xff;
transpart->blocks[xfersectpos+xfersect]->data[xferoffs + 2] = (data >> 8) & 0xff;
transpart->blocks[xfersectpos+xfersect]->data[xferoffs + 3] = (data >> 0) & 0xff;
xferdnum += 4;
xferoffs += 4;
// did we run out of sector?
if (xferoffs >= transpart->blocks[xfersectpos+xfersect]->size)
{
CDROM_LOG(("CD: finished xfer of block %d of %d\n", xfersect+1, xfersectnum))
xferoffs = 0;
xfersect++;
}
}
else // sectors are done
{
/* Virtual On doesnt want this to be resetted. */
//xfertype32 = XFERTYPE32_INVALID;
}
break;
default:
printf("CD: unhandled 32-bit transfer type write\n");
break;
}
break;
default:
break;
}
}
void saturn_state::cd_writeWord(uint32_t addr, uint16_t data)
{
switch(addr & 0xffff)
{
case 0x0008:
case 0x000a:
case 0x8008:
case 0x800a:
// CDROM_LOG(("%s:WW HIRQ: %04x & %04x => %04x\n", machine().describe_context(), hirqreg, data, hirqreg & data))
hirqreg &= data;
return;
case 0x000c:
case 0x000e:
case 0x800c:
case 0x800e:
// CDROM_LOG(("WW HIRM: %04x => %04x\n", hirqmask, data))
printf("WW HIRM: %04x => %04x\n", hirqmask, data);
hirqmask = data;
return;
case 0x0018:
case 0x001a:
case 0x8018:
case 0x801a:
// CDROM_LOG(("WW CR1: %04x\n", data))
cr1 = data;
cd_stat &= ~CD_STAT_PERI;
cmd_pending |= 1;
sh1_timer->adjust(attotime::never);
break;
case 0x001c:
case 0x001e:
case 0x801c:
case 0x801e:
// CDROM_LOG(("WW CR2: %04x\n", data))
cr2 = data;
cmd_pending |= 2;
break;
case 0x0020:
case 0x0022:
case 0x8020:
case 0x8022:
// CDROM_LOG(("WW CR3: %04x\n", data))
cr3 = data;
cmd_pending |= 4;
break;
case 0x0024:
case 0x0026:
case 0x8024:
case 0x8026:
// CDROM_LOG(("WW CR4: %04x\n", data))
cr4 = data;
cmd_pending |= 8;
sh1_timer->adjust(attotime::from_hz(get_timing_command()));
break;
default:
CDROM_LOG(("CD: WW %08x %04x\n", addr, data))
break;
}
}
READ32_MEMBER( saturn_state::stvcd_r )
{
uint32_t rv = 0;
offset <<= 2;
switch (offset)
{
case 0x88008:
case 0x8800a:
case 0x8800c:
case 0x8800e:
case 0x88018:
case 0x8801a:
case 0x8801c:
case 0x8801e:
case 0x88020:
case 0x88022:
case 0x88024:
case 0x88026:
case 0x90008:
case 0x9000a:
case 0x9000c:
case 0x9000e:
case 0x90018:
case 0x9001a:
case 0x9001c:
case 0x9001e:
case 0x90020:
case 0x90022:
case 0x90024:
case 0x90026:
rv = cd_readWord(offset);
return rv<<16;
case 0x98000:
case 0x18000:
if (mem_mask == 0xffffffff)
{
rv = cd_readLong(offset);
}
else if (mem_mask == 0xffff0000)
{
rv = cd_readWord(offset)<<16;
}
else if (mem_mask == 0x0000ffff)
{
rv = cd_readWord(offset);
}
else
{
osd_printf_error("CD: Unknown data buffer read @ mask = %08x\n", mem_mask);
}
break;
default:
printf("Unknown CD read %x\n", offset);
break;
}
return rv;
}
WRITE32_MEMBER( saturn_state::stvcd_w )
{
offset <<= 2;
switch (offset)
{
case 0x18000:
if (mem_mask == 0xffffffff)
cd_writeLong(offset, data);
else
printf("CD: Unknown data buffer write @ mask = %08x\n", mem_mask);
break;
case 0x88008:
case 0x8800a:
case 0x8800c:
case 0x8800e:
case 0x88018:
case 0x8801a:
case 0x8801c:
case 0x8801e:
case 0x88020:
case 0x88022:
case 0x88024:
case 0x88026:
case 0x90008:
case 0x9000a:
case 0x9000c:
case 0x9000e:
case 0x90018:
case 0x9001a:
case 0x9001c:
case 0x9001e:
case 0x90020:
case 0x90022:
case 0x90024:
case 0x90026:
cd_writeWord(offset, data>>16);
break;
default:
printf("Unknown CD write %x @ %x\n", data, offset);
//xferdnum = 0x8c00;
break;
}
}
// iso9660 parsing
void saturn_state::read_new_dir(uint32_t fileno)
{
int foundpd, i;
uint32_t cfad;//, dirfad;
uint8_t sect[2048];
if (fileno == 0xffffff)
{
cfad = 166; // first sector of directory as per iso9660 specs
foundpd = 0; // search for primary vol. desc
while ((!foundpd) && (cfad < 200))
{
if(sectlenin != 2048)
popmessage("Sector Length %d, contact MAMEdev (0)",sectlenin);
memset(sect, 0, 2048);
cd_readblock(cfad++, sect);
if ((sect[1] == 'C') && (sect[2] == 'D') && (sect[3] == '0') && (sect[4] == '0') && (sect[5] == '1'))
{
switch (sect[0])
{
case 0: // boot record
break;
case 1: // primary vol. desc
foundpd = 1;
break;
case 2: // secondary vol desc
break;
case 3: // vol. section descriptor
break;
case 0xff:
cfad = 200;
break;
}
}
}
// got primary vol. desc.
if (foundpd)
{
//dirfad = sect[140] | (sect[141]<<8) | (sect[142]<<16) | (sect[143]<<24);
//dirfad += 150;
// parse root entry
curroot.firstfad = sect[158] | (sect[159]<<8) | (sect[160]<<16) | (sect[161]<<24);
curroot.firstfad += 150;
curroot.length = sect[166] | (sect[167]<<8) | (sect[168]<<16) | (sect[169]<<24);
curroot.flags = sect[181];
for (i = 0; i < sect[188]; i++)
{
curroot.name[i] = sect[189+i];
}
curroot.name[i] = '\0'; // terminate
// easy to fix, but make sure we *need* to first
if (curroot.length > MAX_DIR_SIZE)
{
osd_printf_error("ERROR: root directory too big (%d)\n", curroot.length);
}
// done with all that, read the root directory now
make_dir_current(curroot.firstfad);
}
}
else
{
if (curdir[fileno].length > MAX_DIR_SIZE)
{
osd_printf_error("ERROR: new directory too big (%d)!\n", curdir[fileno].length);
}
make_dir_current(curdir[fileno].firstfad);
}
}
// makes the directory pointed to by FAD current
void saturn_state::make_dir_current(uint32_t fad)
{
uint32_t i;
uint32_t nextent, numentries;
std::vector<uint8_t> sect(MAX_DIR_SIZE);
direntryT *curentry;
memset(&sect[0], 0, MAX_DIR_SIZE);
if(sectlenin != 2048)
popmessage("Sector Length %d, contact MAMEdev (1)",sectlenin);
for (i = 0; i < (curroot.length/2048); i++)
{
cd_readblock(fad+i, &sect[2048*i]);
}
nextent = 0;
numentries = 0;
while (nextent < MAX_DIR_SIZE)
{
if (sect[nextent])
{
nextent += sect[nextent];
numentries++;
}
else
{
nextent = MAX_DIR_SIZE;
}
}
curdir.resize(numentries);
curentry = &curdir[0];
numfiles = numentries;
nextent = 0;
while (numentries)
{
// [0] record size
// [1] xa record size
// [2-5] lba
// [6-9] (lba?)
// [10-13] size
// [14-17] (size?)
// [18] year
// [19] month
// [20] day
// [21] hour
// [22] minute
// [23] second
// [24] gmt offset
// [25] flags
// [26] file unit size
// [27] interleave gap size
// [28-29] volume sequencer number
// [30-31] (volume sequencer number?)
// [32] name character size
// [33+ ...] file name
curentry->record_size = sect[nextent+0];
curentry->xa_record_size = sect[nextent+1];
curentry->firstfad = sect[nextent+2] | (sect[nextent+3]<<8) | (sect[nextent+4]<<16) | (sect[nextent+5]<<24);
curentry->firstfad += 150;
curentry->length = sect[nextent+10] | (sect[nextent+11]<<8) | (sect[nextent+12]<<16) | (sect[nextent+13]<<24);
curentry->year = sect[nextent+18];
curentry->month = sect[nextent+19];
curentry->day = sect[nextent+20];
curentry->hour = sect[nextent+21];
curentry->minute = sect[nextent+22];
curentry->second = sect[nextent+23];
curentry->gmt_offset = sect[nextent+24];
curentry->flags = sect[nextent+25];
curentry->file_unit_size = sect[nextent+26];
curentry->interleave_gap_size = sect[nextent+27];
curentry->volume_sequencer_number = sect[nextent+28] | (sect[nextent+29] << 8);
for (i = 0; i < sect[nextent+32]; i++)
{
curentry->name[i] = sect[nextent+33+i];
}
curentry->name[i] = '\0'; // terminate
//printf("%08x %08x %s %d/%d/%d\n",curentry->firstfad,curentry->length,curentry->name,curentry->year,curentry->month,curentry->day);
nextent += sect[nextent];
curentry++;
numentries--;
}
for (i = 0; i < numfiles; i++)
{
if (!(curdir[i].flags & 0x02))
{
firstfile = i;
i = numfiles;
}
}
}
void saturn_state::stvcd_exit( void )
{
curdir.clear();
if (cdrom)
{
cdrom_image_device *cddevice = machine().device<cdrom_image_device>("cdrom");
if (cddevice==nullptr)
{
cdrom_close(cdrom);
}
cdrom = (cdrom_file *)nullptr;
}
}
void saturn_state::cd_readTOC(void)
{
int i, ntrks, tocptr, fad;
xfertype = XFERTYPE_TOC;
xfercount = 0;
if (cdrom)
{
ntrks = cdrom_get_last_track(cdrom);
}
else
{
ntrks = 0;
}
// data format for Saturn TOC:
// no header.
// 4 bytes per track
// top nibble of first byte is CTRL info
// low nibble is ADR
// next 3 bytes are FAD address (LBA + 150)
// there are always 99 track entries (0-98)
// unused tracks are ffffffff.
// entries 99-101 are metadata
tocptr = 0; // starting point of toc entries
for (i = 0; i < ntrks; i++)
{
if (cdrom)
{
//tocbuf[tocptr] = sega_cdrom_get_adr_control(cdrom, i);
//HACK: ddsom does not enter ingame with the line above!
tocbuf[tocptr] = cdrom_get_adr_control(cdrom, i)<<4 | 0x01;
}
else
{
tocbuf[tocptr] = 0xff;
}
if (cdrom)
{
fad = cdrom_get_track_start(cdrom, i) + 150;
tocbuf[tocptr+1] = (fad>>16)&0xff;
tocbuf[tocptr+2] = (fad>>8)&0xff;
tocbuf[tocptr+3] = fad&0xff;
}
else
{
tocbuf[tocptr+1] = 0xff;
tocbuf[tocptr+2] = 0xff;
tocbuf[tocptr+3] = 0xff;
}
tocptr += 4;
}
// fill in the rest
for ( ; i < 99; i++)
{
tocbuf[tocptr] = 0xff;
tocbuf[tocptr+1] = 0xff;
tocbuf[tocptr+2] = 0xff;
tocbuf[tocptr+3] = 0xff;
tocptr += 4;
}
// tracks 99-101 are special metadata
// $$$FIXME: what to do with the address info for these?
tocptr = 99 * 4;
tocbuf[tocptr] = tocbuf[0]; // get ctrl/adr from first track
tocbuf[tocptr+1] = 1; // first track's track #
tocbuf[tocptr+2] = 0;
tocbuf[tocptr+3] = 0;
tocbuf[tocptr+4] = tocbuf[(ntrks-1)*4]; // ditto for last track
tocbuf[tocptr+5] = ntrks; // last track's track #
tocbuf[tocptr+6] = 0;
tocbuf[tocptr+7] = 0;
// get total disc length (start of lead-out)
fad = cdrom_get_track_start(cdrom, 0xaa) + 150;
tocbuf[tocptr+8] = tocbuf[0];
tocbuf[tocptr+9] = (fad>>16)&0xff;
tocbuf[tocptr+10] = (fad>>8)&0xff;
tocbuf[tocptr+11] = fad&0xff;
}
saturn_state::partitionT *saturn_state::cd_filterdata(filterT *flt, int trktype, uint8_t *p_ok)
{
int match, keepgoing;
partitionT *filterprt;
CDROM_LOG(("cd_filterdata, trktype %d\n", trktype))
match = 1;
keepgoing = 2;
lastbuf = flt->condtrue;
// loop on the filters
do
{
// FAD range check?
/* according to an obscure document note, this switches the filter connector to be false if the range fails ... I think ... */
if (flt->mode & 0x40)
{
if ((cd_curfad < flt->fad) || (cd_curfad > (flt->fad + flt->range)))
{
printf("curfad reject %08x %08x %08x %08x\n",cd_curfad,fadstoplay,flt->fad,flt->fad+flt->range);
match = 0;
//lastbuf = flt->condfalse;
//flt = &filters[lastbuf];
}
}
if ((trktype != CD_TRACK_AUDIO) && (curblock.data[15] == 2))
{
if (flt->mode & 1) // file number
{
if (curblock.fnum != flt->fid)
{
printf("fnum reject\n");
match = 0;
}
}
if (flt->mode & 2) // channel number
{
if (curblock.chan != flt->chan)
{
printf("channel number reject\n");
match = 0;
}
}
if (flt->mode & 4) // sub mode
{
if((curblock.subm & flt->smmask) != flt->smval)
{
printf("sub mode reject\n");
match = 0;
}
}
if (flt->mode & 8) // coding information
{
if((curblock.cinf & flt->cimask) != flt->cival)
{
printf("coding information reject\n");
match = 0;
}
}
if (flt->mode & 0x10) // reverse subheader conditions
{
match ^= 1;
}
}
if (match)
{
//lastbuf = flt->condtrue;
//filterprt = &partitions[lastbuf];
// we're done
keepgoing = 0;
}
else
{
lastbuf = flt->condfalse;
// reject sector if no match on either connector
if ((lastbuf == 0xff) || (keepgoing == 0))
{
*p_ok = 0;
return (partitionT *)nullptr;
}
// try again using the filter that was on the "false" connector
flt = &filters[lastbuf];
match = 1;
// and exit if we fail
keepgoing--;
}
} while (keepgoing);
filterprt = &partitions[lastbuf];
// try to allocate a block
filterprt->blocks[filterprt->numblks] = cd_alloc_block(&filterprt->bnum[filterprt->numblks]);
// did the allocation succeed?
if (filterprt->blocks[filterprt->numblks] == (blockT *)nullptr)
{
*p_ok = 0;
return (partitionT *)nullptr;
}
// copy working block to the newly allocated one
memcpy(filterprt->blocks[filterprt->numblks], &curblock, sizeof(blockT));
// and massage the data format a bit
switch (curblock.size)
{
case 2048: // user data
if (curblock.data[15] == 2)
{
// mode 2
memcpy(&filterprt->blocks[filterprt->numblks]->data[0], &curblock.data[24], curblock.size);
}
else
{
// mode 1
memcpy(&filterprt->blocks[filterprt->numblks]->data[0], &curblock.data[16], curblock.size);
}
break;
case 2324: // Mode 2 Form 2 data
memcpy(&filterprt->blocks[filterprt->numblks]->data[0], &curblock.data[24], curblock.size);
break;
case 2336: // Mode 2 Form 2 skip sync/header
memcpy(&filterprt->blocks[filterprt->numblks]->data[0], &curblock.data[16], curblock.size);
break;
case 2340: // Mode 2 Form 2 skip sync only
memcpy(&filterprt->blocks[filterprt->numblks]->data[0], &curblock.data[12], curblock.size);
break;
case 2352: // want all data, it's already done, so don't do it again :)
break;
}
// update the status of the partition
if (filterprt->size == -1)
filterprt->size = 0;
filterprt->size += filterprt->blocks[filterprt->numblks]->size;
filterprt->numblks++;
*p_ok = 1;
return filterprt;
}
// read a single sector off the CD, applying the current filter(s) as necessary
saturn_state::partitionT *saturn_state::cd_read_filtered_sector(int32_t fad, uint8_t *p_ok)
{
int trktype;
if ((cddevice != nullptr) && (!buffull))
{
// find out the track's type
trktype = cdrom_get_track_type(cdrom, cdrom_get_track(cdrom, fad-150));
// now get a raw 2352 byte sector - if it's mode 1, get mode1_raw
if ((trktype == CD_TRACK_MODE1) || (trktype == CD_TRACK_MODE1_RAW))
{
cdrom_read_data(cdrom, fad-150, curblock.data, CD_TRACK_MODE1_RAW);
}
else if (trktype != CD_TRACK_AUDIO) // if not audio it must be mode 2 so get mode2_raw
{
cdrom_read_data(cdrom, fad-150, curblock.data, CD_TRACK_MODE2_RAW);
}
else
{
cdrom_read_data(cdrom, fad-150, curblock.data, CD_TRACK_AUDIO);
}
curblock.size = sectlenin;
curblock.FAD = fad;
// if track is Mode 2, get the subheader values
if ((trktype != CD_TRACK_AUDIO) && (curblock.data[15] == 2))
{
curblock.chan = curblock.data[17];
curblock.fnum = curblock.data[16];
curblock.subm = curblock.data[18];
curblock.cinf = curblock.data[19];
// if it's Form 2, the length is actually 2324 bytes
if (curblock.subm & 0x20)
{
curblock.size = 2324;
}
}
return cd_filterdata(cddevice, trktype, &*p_ok);
}
*p_ok = 0;
return (partitionT *)nullptr;
}
// loads in data set up by a CD-block PLAY command
void saturn_state::cd_playdata( void )
{
if ((cd_stat & 0x0f00) == CD_STAT_SEEK)
{
int32_t fad_diff;
//printf("PRE %08x %08x %08x %d\n",cd_curfad,cd_fad_seek,cd_stat,cd_fad_seek - cd_curfad);
fad_diff = (cd_fad_seek - cd_curfad);
/* Zero Divide wants this TODO: timings. */
if(fad_diff > (750*cd_speed))
{
//printf("PRE FFWD %08x %08x %08x %d %d\n",cd_curfad,cd_fad_seek,cd_stat,cd_fad_seek - cd_curfad,750*cd_speed);
cd_curfad += (750*cd_speed);
//printf("POST FFWD %08x %08x %08x %d %d\n",cd_curfad,cd_fad_seek,cd_stat,cd_fad_seek - cd_curfad, 750*cd_speed);
}
else if(fad_diff < (-750*cd_speed))
{
//printf("PRE REW %08x %08x %08x %d %d\n",cd_curfad,cd_fad_seek,cd_stat,cd_fad_seek - cd_curfad, -750*cd_speed);
cd_curfad -= (750*cd_speed);
//printf("POST REW %08x %08x %08x %d %d\n",cd_curfad,cd_fad_seek,cd_stat,cd_fad_seek - cd_curfad, -750*cd_speed);
}
else
{
//printf("Ready\n");
cd_curfad = cd_fad_seek;
cd_stat = CD_STAT_PLAY;
}
return;
}
if ((cd_stat & 0x0f00) == CD_STAT_PLAY)
{
if (fadstoplay)
{
logerror("STVCD: Reading FAD %d\n", cd_curfad);
if (cdrom)
{
uint8_t p_ok;
if(cdrom_get_track_type(cdrom, cdrom_get_track(cdrom, cd_curfad)) != CD_TRACK_AUDIO)
{
cd_read_filtered_sector(cd_curfad,&p_ok);
machine().device<cdda_device>("cdda")->stop_audio(); //stop any pending CD-DA
}
else
{
p_ok = 1; // TODO
machine().device<cdda_device>("cdda")->start_audio(cd_curfad, 1);
}
if(p_ok)
{
cd_curfad++;
fadstoplay--;
hirqreg |= CSCT;
sectorstore = 1;
if (!fadstoplay)
{
if(cdda_repeat_count >= cdda_maxrepeat)
{
CDROM_LOG(("cd_playdata: playback ended\n"))
cd_stat = CD_STAT_PAUSE;
hirqreg |= PEND;
if (playtype == 1)
{
CDROM_LOG(("cd_playdata: setting EFLS\n"))
hirqreg |= EFLS;
}
}
else
{
if(cdda_repeat_count < 0xe)
cdda_repeat_count++;
cd_curfad = cdrom_get_track_start(cdrom, cur_track-1) + 150;
fadstoplay = cdrom_get_track_start(cdrom, cur_track) - cd_curfad;
}
}
}
}
}
}
}
// loads a single sector off the CD, anywhere from FAD 150 on up
void saturn_state::cd_readblock(uint32_t fad, uint8_t *dat)
{
if (cdrom)
{
cdrom_read_data(cdrom, fad-150, dat, CD_TRACK_MODE1);
}
}
void saturn_state::stvcd_set_tray_open( void )
{
if(!tray_is_closed)
return;
hirqreg |= DCHG;
cd_stat = CD_STAT_OPEN;
cdrom = (cdrom_file *)nullptr;
tray_is_closed = 0;
popmessage("Tray Open");
}
void saturn_state::stvcd_set_tray_close( void )
{
/* avoid user attempts to load a CD-ROM without opening the tray first (emulation asserts anyway with current framework) */
if(tray_is_closed)
return;
hirqreg |= DCHG;
cdrom = (cdrom_file *)nullptr;
cdrom_image_device *cddevice = machine().device<cdrom_image_device>("cdrom");
if (cddevice!=nullptr)
{
// MESS case
cdrom = cddevice->get_cdrom_file();
}
else
{
// MAME case
cdrom = cdrom_open(machine().rom_load().get_disk_handle(":cdrom"));
}
machine().device<cdda_device>("cdda")->set_cdrom(cdrom);
if (cdrom)
{
CDROM_LOG(("Opened CD-ROM successfully, reading root directory\n"))
//read_new_dir(0xffffff); // read root directory
cd_stat = CD_STAT_PAUSE;
}
else
{
cd_stat = CD_STAT_NODISC;
}
cd_speed = 2;
cdda_repeat_count = 0;
tray_is_closed = 1;
popmessage("Tray Close");
}
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