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Made MPU4Vid chips properly 8-bit where possible, still doesn't fix 6850 issues though, but does fix CHR regression (nw)

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This commit is contained in:
James Wallace 2014-06-09 19:56:51 +00:00
parent 0159e86b73
commit d206a635dc
3 changed files with 53 additions and 152 deletions
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193
src/mame/drivers/mpu4vid.c
View File

@ -195,7 +195,7 @@ TODO:
#include "crmaze2p.lh" #include "crmaze2p.lh"
#include "crmaze4p.lh" #include "crmaze4p.lh"
#include "includes/mpu4.h" #include "includes/mpu4.h"
#include "cpu/m68000/m68000.h" #include "cpu/m68000/m68000.h"
struct ef9369_t struct ef9369_t
@ -289,14 +289,12 @@ public:
DECLARE_WRITE_LINE_MEMBER(update_mpu68_interrupts); DECLARE_WRITE_LINE_MEMBER(update_mpu68_interrupts);
DECLARE_READ16_MEMBER( mpu4_vid_vidram_r ); DECLARE_READ16_MEMBER( mpu4_vid_vidram_r );
DECLARE_WRITE16_MEMBER( mpu4_vid_vidram_w ); DECLARE_WRITE16_MEMBER( mpu4_vid_vidram_w );
DECLARE_WRITE16_MEMBER( ef9369_w ); DECLARE_WRITE8_MEMBER( ef9369_w );
DECLARE_READ16_MEMBER( ef9369_r ); DECLARE_READ8_MEMBER( ef9369_r );
DECLARE_WRITE16_MEMBER( bt471_w ); DECLARE_WRITE8_MEMBER( bt471_w );
DECLARE_READ16_MEMBER( bt471_r ); DECLARE_READ8_MEMBER( bt471_r );
DECLARE_WRITE16_MEMBER( characteriser16_w ); DECLARE_WRITE8_MEMBER( vidcharacteriser_w );
DECLARE_READ16_MEMBER( characteriser16_r ); DECLARE_READ8_MEMBER( vidcharacteriser_r );
DECLARE_WRITE16_MEMBER( bwb_characteriser16_w );
DECLARE_READ16_MEMBER( bwb_characteriser16_r );
DECLARE_WRITE_LINE_MEMBER(mpu_video_reset); DECLARE_WRITE_LINE_MEMBER(mpu_video_reset);
}; };
@ -491,10 +489,9 @@ VIDEO_START_MEMBER(mpu4vid_state,mpu4_vid)
/* Non-multiplexed mode */ /* Non-multiplexed mode */
WRITE16_MEMBER(mpu4vid_state::ef9369_w ) WRITE8_MEMBER(mpu4vid_state::ef9369_w )
{ {
struct ef9369_t &pal = m_pal; struct ef9369_t &pal = m_pal;
data &= 0x00ff;
/* Address register */ /* Address register */
if (offset & 1) if (offset & 1)
@ -532,22 +529,25 @@ WRITE16_MEMBER(mpu4vid_state::ef9369_w )
} }
READ16_MEMBER(mpu4vid_state::ef9369_r ) READ8_MEMBER(mpu4vid_state::ef9369_r )
{ {
struct ef9369_t &pal = m_pal; struct ef9369_t &pal = m_pal;
if ((offset & 1) == 0) if ((offset & 1) == 0)
{ {
UINT16 col = pal.clut[pal.addr >> 1]; UINT16 col = pal.clut[pal.addr >> 1];
if ((pal.addr & 1) == 0) /* if ((pal.addr & 1) == 0)
return col & 0xff; return col & 0xff;
else else
return col >> 8; return col >> 8;
*/
return col;
} }
else else
{ {
/* Address register is write only */ /* Address register is write only */
return 0xffff; return 0xff;
} }
} }
@ -568,19 +568,15 @@ READ16_MEMBER(mpu4vid_state::ef9369_r )
* 1 0 1 Overlay register * 1 0 1 Overlay register
*/ */
WRITE16_MEMBER(mpu4vid_state::bt471_w ) WRITE8_MEMBER(mpu4vid_state::bt471_w )
{ {
struct bt471_t &bt471 = m_bt471; struct bt471_t &bt471 = m_bt471;
UINT8 val = data & 0xff;
{
popmessage("Bt471: Unhandled write access (offset:%x, data:%x)", offset, val);
}
switch (offset) switch (offset)
{ {
case 0x0: case 0x0:
{ {
bt471.address = val; bt471.address = data;
bt471.addr_cnt = 0; bt471.addr_cnt = 0;
break; break;
} }
@ -589,7 +585,7 @@ WRITE16_MEMBER(mpu4vid_state::bt471_w )
UINT8 *addr_cnt = &bt471.addr_cnt; UINT8 *addr_cnt = &bt471.addr_cnt;
rgb_t *color = &bt471.color; rgb_t *color = &bt471.color;
color[*addr_cnt] = val; color[*addr_cnt] = data;
if (++*addr_cnt == 3) if (++*addr_cnt == 3)
{ {
@ -603,18 +599,18 @@ WRITE16_MEMBER(mpu4vid_state::bt471_w )
} }
case 0x2: case 0x2:
{ {
bt471.pixmask = val; bt471.pixmask = data;
break; break;
} }
// default: default:
{ {
popmessage("Bt471: Unhandled write access (offset:%x, data:%x)", offset, val); popmessage("Bt471: Unhandled write access (offset:%x, data:%x)", offset, data);
} }
} }
} }
READ16_MEMBER(mpu4vid_state::bt471_r ) READ8_MEMBER(mpu4vid_state::bt471_r )
{ {
popmessage("Bt471: Unhandled read access (offset:%x)", offset); popmessage("Bt471: Unhandled read access (offset:%x)", offset);
return 0; return 0;
@ -1290,17 +1286,17 @@ static ADDRESS_MAP_START( mpu4_68k_map, AS_PROGRAM, 16, mpu4vid_state )
// AM_RANGE(0x810000, 0x81ffff) AM_RAM /* ? */ // AM_RANGE(0x810000, 0x81ffff) AM_RAM /* ? */
AM_RANGE(0x900000, 0x900001) AM_DEVWRITE8("saa", saa1099_device, saa1099_data_w, 0x00ff) AM_RANGE(0x900000, 0x900001) AM_DEVWRITE8("saa", saa1099_device, saa1099_data_w, 0x00ff)
AM_RANGE(0x900002, 0x900003) AM_DEVWRITE8("saa", saa1099_device, saa1099_control_w, 0x00ff) AM_RANGE(0x900002, 0x900003) AM_DEVWRITE8("saa", saa1099_device, saa1099_control_w, 0x00ff)
AM_RANGE(0xa00000, 0xa00003) AM_READWRITE(ef9369_r, ef9369_w) AM_RANGE(0xa00000, 0xa00003) AM_READWRITE8(ef9369_r, ef9369_w,0x00ff)
/* AM_RANGE(0xa00004, 0xa0000f) AM_READWRITE(mpu4_vid_unmap_r, mpu4_vid_unmap_w) */ /* AM_RANGE(0xa00004, 0xa0000f) AM_READWRITE(mpu4_vid_unmap_r, mpu4_vid_unmap_w) */
AM_RANGE(0xb00000, 0xb0000f) AM_DEVREADWRITE("scn2674_vid", scn2674_device, mpu4_vid_scn2674_r, mpu4_vid_scn2674_w) AM_RANGE(0xb00000, 0xb0000f) AM_DEVREADWRITE8("scn2674_vid", scn2674_device, mpu4_vid_scn2674_r, mpu4_vid_scn2674_w,0x00ff)
AM_RANGE(0xc00000, 0xc1ffff) AM_READWRITE(mpu4_vid_vidram_r, mpu4_vid_vidram_w) AM_SHARE("vid_vidram") AM_RANGE(0xc00000, 0xc1ffff) AM_READWRITE(mpu4_vid_vidram_r, mpu4_vid_vidram_w) AM_SHARE("vid_vidram")
AM_RANGE(0xff8000, 0xff8001) AM_DEVREADWRITE8("acia6850_1", acia6850_device, status_r, control_w, 0xff) AM_RANGE(0xff8000, 0xff8001) AM_DEVREADWRITE8("acia6850_1", acia6850_device, status_r, control_w, 0x00ff)
AM_RANGE(0xff8002, 0xff8003) AM_DEVREADWRITE8("acia6850_1", acia6850_device, data_r, data_w, 0xff) AM_RANGE(0xff8002, 0xff8003) AM_DEVREADWRITE8("acia6850_1", acia6850_device, data_r, data_w, 0x00ff)
AM_RANGE(0xff9000, 0xff900f) AM_DEVREADWRITE8("6840ptm_68k", ptm6840_device, read, write, 0xff) AM_RANGE(0xff9000, 0xff900f) AM_DEVREADWRITE8("6840ptm_68k", ptm6840_device, read, write, 0x00ff)
AM_RANGE(0xffd000, 0xffd00f) AM_READWRITE(characteriser16_r, characteriser16_w) AM_RANGE(0xffd000, 0xffd00f) AM_READWRITE8(vidcharacteriser_r, vidcharacteriser_w,0x00ff)
ADDRESS_MAP_END ADDRESS_MAP_END
static ADDRESS_MAP_START( mpu4oki_68k_map, AS_PROGRAM, 16, mpu4vid_state ) static ADDRESS_MAP_START( mpu4oki_68k_map, AS_PROGRAM, 16, mpu4vid_state )
@ -1310,18 +1306,18 @@ static ADDRESS_MAP_START( mpu4oki_68k_map, AS_PROGRAM, 16, mpu4vid_state )
AM_RANGE(0x800000, 0x80ffff) AM_RAM AM_SHARE("vid_mainram") AM_RANGE(0x800000, 0x80ffff) AM_RAM AM_SHARE("vid_mainram")
AM_RANGE(0x900000, 0x900001) AM_DEVWRITE8("saa", saa1099_device, saa1099_data_w, 0x00ff) AM_RANGE(0x900000, 0x900001) AM_DEVWRITE8("saa", saa1099_device, saa1099_data_w, 0x00ff)
AM_RANGE(0x900002, 0x900003) AM_DEVWRITE8("saa", saa1099_device, saa1099_control_w, 0x00ff) AM_RANGE(0x900002, 0x900003) AM_DEVWRITE8("saa", saa1099_device, saa1099_control_w, 0x00ff)
AM_RANGE(0xa00000, 0xa00003) AM_READWRITE(ef9369_r, ef9369_w) AM_RANGE(0xa00000, 0xa00003) AM_READWRITE8(ef9369_r, ef9369_w,0x00ff)
AM_RANGE(0xb00000, 0xb0000f) AM_DEVREADWRITE("scn2674_vid", scn2674_device, mpu4_vid_scn2674_r, mpu4_vid_scn2674_w) AM_RANGE(0xb00000, 0xb0000f) AM_DEVREADWRITE8("scn2674_vid", scn2674_device, mpu4_vid_scn2674_r, mpu4_vid_scn2674_w,0x00ff)
AM_RANGE(0xc00000, 0xc1ffff) AM_READWRITE(mpu4_vid_vidram_r, mpu4_vid_vidram_w) AM_SHARE("vid_vidram") AM_RANGE(0xc00000, 0xc1ffff) AM_READWRITE(mpu4_vid_vidram_r, mpu4_vid_vidram_w) AM_SHARE("vid_vidram")
AM_RANGE(0xff8000, 0xff8001) AM_DEVREADWRITE8("acia6850_1", acia6850_device, status_r, control_w, 0xff) AM_RANGE(0xff8000, 0xff8001) AM_DEVREADWRITE8("acia6850_1", acia6850_device, status_r, control_w, 0x00ff)
AM_RANGE(0xff8002, 0xff8003) AM_DEVREADWRITE8("acia6850_1", acia6850_device, data_r, data_w, 0xff) AM_RANGE(0xff8002, 0xff8003) AM_DEVREADWRITE8("acia6850_1", acia6850_device, data_r, data_w, 0x00ff)
AM_RANGE(0xff9000, 0xff900f) AM_DEVREADWRITE8("6840ptm_68k", ptm6840_device, read, write, 0xff) AM_RANGE(0xff9000, 0xff900f) AM_DEVREADWRITE8("6840ptm_68k", ptm6840_device, read, write, 0x00ff)
AM_RANGE(0xffa040, 0xffa04f) AM_DEVREAD8("ptm_ic3ss", ptm6840_device, read,0xff) // 6840PTM on sampled sound board AM_RANGE(0xffa040, 0xffa04f) AM_DEVREAD8("ptm_ic3ss", ptm6840_device, read,0x00ff) // 6840PTM on sampled sound board
AM_RANGE(0xffa040, 0xffa04f) AM_WRITE8(ic3ss_w,0x00ff) // 6840PTM on sampled sound board AM_RANGE(0xffa040, 0xffa04f) AM_WRITE8(ic3ss_w,0x00ff) // 6840PTM on sampled sound board
AM_RANGE(0xffa060, 0xffa067) AM_DEVREADWRITE8("pia_ic4ss", pia6821_device, read, write,0x00ff) // PIA6821 on sampled sound board AM_RANGE(0xffa060, 0xffa067) AM_DEVREADWRITE8("pia_ic4ss", pia6821_device, read, write,0x00ff) // PIA6821 on sampled sound board
AM_RANGE(0xffd000, 0xffd00f) AM_READWRITE(characteriser16_r, characteriser16_w) AM_RANGE(0xffd000, 0xffd00f) AM_READWRITE8(vidcharacteriser_r, vidcharacteriser_w, 0x00ff)
// AM_RANGE(0xfff000, 0xffffff) AM_NOP /* Possible bug, reads and writes here */ // AM_RANGE(0xfff000, 0xffffff) AM_NOP /* Possible bug, reads and writes here */
ADDRESS_MAP_END ADDRESS_MAP_END
@ -1332,15 +1328,15 @@ static ADDRESS_MAP_START( bwbvid_68k_map, AS_PROGRAM, 16, mpu4vid_state )
AM_RANGE(0x810000, 0x81ffff) AM_RAM /* ? */ AM_RANGE(0x810000, 0x81ffff) AM_RAM /* ? */
AM_RANGE(0x900000, 0x900001) AM_DEVWRITE8("saa", saa1099_device, saa1099_data_w, 0x00ff) AM_RANGE(0x900000, 0x900001) AM_DEVWRITE8("saa", saa1099_device, saa1099_data_w, 0x00ff)
AM_RANGE(0x900002, 0x900003) AM_DEVWRITE8("saa", saa1099_device, saa1099_control_w, 0x00ff) AM_RANGE(0x900002, 0x900003) AM_DEVWRITE8("saa", saa1099_device, saa1099_control_w, 0x00ff)
AM_RANGE(0xa00000, 0xa00003) AM_READWRITE(ef9369_r, ef9369_w) AM_RANGE(0xa00000, 0xa00003) AM_READWRITE8(ef9369_r, ef9369_w,0x00ff)
// AM_RANGE(0xa00000, 0xa0000f) AM_READWRITE(bt471_r,bt471_w) //Some games use this // AM_RANGE(0xa00000, 0xa0000f) AM_READWRITE(bt471_r,bt471_w) //Some games use this
/* AM_RANGE(0xa00004, 0xa0000f) AM_READWRITE(mpu4_vid_unmap_r, mpu4_vid_unmap_w) */ /* AM_RANGE(0xa00004, 0xa0000f) AM_READWRITE(mpu4_vid_unmap_r, mpu4_vid_unmap_w) */
AM_RANGE(0xb00000, 0xb0000f) AM_DEVREADWRITE("scn2674_vid", scn2674_device, mpu4_vid_scn2674_r, mpu4_vid_scn2674_w) AM_RANGE(0xb00000, 0xb0000f) AM_DEVREADWRITE8("scn2674_vid", scn2674_device, mpu4_vid_scn2674_r, mpu4_vid_scn2674_w,0x00ff)
AM_RANGE(0xc00000, 0xc1ffff) AM_READWRITE(mpu4_vid_vidram_r, mpu4_vid_vidram_w) AM_SHARE("vid_vidram") AM_RANGE(0xc00000, 0xc1ffff) AM_READWRITE(mpu4_vid_vidram_r, mpu4_vid_vidram_w) AM_SHARE("vid_vidram")
AM_RANGE(0xe00000, 0xe00001) AM_DEVREADWRITE8("acia6850_1", acia6850_device, status_r, control_w, 0xff) AM_RANGE(0xe00000, 0xe00001) AM_DEVREADWRITE8("acia6850_1", acia6850_device, status_r, control_w, 0x00ff)
AM_RANGE(0xe00002, 0xe00003) AM_DEVREADWRITE8("acia6850_1", acia6850_device, data_r, data_w, 0xff) AM_RANGE(0xe00002, 0xe00003) AM_DEVREADWRITE8("acia6850_1", acia6850_device, data_r, data_w, 0x00ff)
AM_RANGE(0xe01000, 0xe0100f) AM_DEVREADWRITE8("6840ptm_68k", ptm6840_device, read, write, 0xff) AM_RANGE(0xe01000, 0xe0100f) AM_DEVREADWRITE8("6840ptm_68k", ptm6840_device, read, write, 0x00ff)
//AM_RANGE(0xa00004, 0xa0000f) AM_READWRITE(bwb_characteriser16_r, bwb_characteriser16_w)//AM_READWRITE(adpcm_r, adpcm_w) CHR ? //AM_RANGE(0xa00004, 0xa0000f) AM_READWRITE(bwb_characteriser16_r, bwb_characteriser16_w)//AM_READWRITE(adpcm_r, adpcm_w) CHR ?
ADDRESS_MAP_END ADDRESS_MAP_END
@ -1350,19 +1346,19 @@ static ADDRESS_MAP_START( bwbvid5_68k_map, AS_PROGRAM, 16, mpu4vid_state )
AM_RANGE(0x810000, 0x81ffff) AM_RAM /* ? */ AM_RANGE(0x810000, 0x81ffff) AM_RAM /* ? */
AM_RANGE(0x900000, 0x900001) AM_DEVWRITE8("saa", saa1099_device, saa1099_data_w, 0x00ff) AM_RANGE(0x900000, 0x900001) AM_DEVWRITE8("saa", saa1099_device, saa1099_data_w, 0x00ff)
AM_RANGE(0x900002, 0x900003) AM_DEVWRITE8("saa", saa1099_device, saa1099_control_w, 0x00ff) AM_RANGE(0x900002, 0x900003) AM_DEVWRITE8("saa", saa1099_device, saa1099_control_w, 0x00ff)
AM_RANGE(0xa00000, 0xa00003) AM_READWRITE(ef9369_r, ef9369_w) AM_RANGE(0xa00000, 0xa00003) AM_READWRITE8(ef9369_r, ef9369_w,0x00ff)
//AM_RANGE(0xa00000, 0xa00003) AM_READWRITE(bt471_r,bt471_w) Some games use this //AM_RANGE(0xa00000, 0xa00003) AM_READWRITE8(bt471_r,bt471_w,0x00ff) Some games use this
/* AM_RANGE(0xa00004, 0xa0000f) AM_READWRITE(mpu4_vid_unmap_r, mpu4_vid_unmap_w) */ /* AM_RANGE(0xa00004, 0xa0000f) AM_READWRITE(mpu4_vid_unmap_r, mpu4_vid_unmap_w) */
AM_RANGE(0xb00000, 0xb0000f) AM_DEVREADWRITE("scn2674_vid", scn2674_device, mpu4_vid_scn2674_r, mpu4_vid_scn2674_w) AM_RANGE(0xb00000, 0xb0000f) AM_DEVREADWRITE8("scn2674_vid", scn2674_device, mpu4_vid_scn2674_r, mpu4_vid_scn2674_w,0x00ff)
AM_RANGE(0xc00000, 0xc1ffff) AM_READWRITE(mpu4_vid_vidram_r, mpu4_vid_vidram_w) AM_SHARE("vid_vidram") AM_RANGE(0xc00000, 0xc1ffff) AM_READWRITE(mpu4_vid_vidram_r, mpu4_vid_vidram_w) AM_SHARE("vid_vidram")
AM_RANGE(0xe00000, 0xe00001) AM_DEVREADWRITE8("acia6850_1", acia6850_device, status_r, control_w, 0xff) AM_RANGE(0xe00000, 0xe00001) AM_DEVREADWRITE8("acia6850_1", acia6850_device, status_r, control_w, 0x00ff)
AM_RANGE(0xe00002, 0xe00003) AM_DEVREADWRITE8("acia6850_1", acia6850_device, data_r, data_w, 0xff) AM_RANGE(0xe00002, 0xe00003) AM_DEVREADWRITE8("acia6850_1", acia6850_device, data_r, data_w, 0x00ff)
AM_RANGE(0xe01000, 0xe0100f) AM_DEVREADWRITE8("6840ptm_68k", ptm6840_device, read, write, 0x00ff) AM_RANGE(0xe01000, 0xe0100f) AM_DEVREADWRITE8("6840ptm_68k", ptm6840_device, read, write, 0x00ff)
AM_RANGE(0xe02000, 0xe02007) AM_DEVREADWRITE8("pia_ic4ss", pia6821_device, read, write, 0xff00) AM_RANGE(0xe02000, 0xe02007) AM_DEVREADWRITE8("pia_ic4ss", pia6821_device, read, write, 0xff00) //Seems odd...
AM_RANGE(0xe03000, 0xe0300f) AM_DEVREAD8("ptm_ic3ss", ptm6840_device, read,0xff00) // 6840PTM on sampled sound board AM_RANGE(0xe03000, 0xe0300f) AM_DEVREAD8("ptm_ic3ss", ptm6840_device, read,0xff00) // 6840PTM on sampled sound board
AM_RANGE(0xe03000, 0xe0300f) AM_WRITE8(ic3ss_w,0xff00) // 6840PTM on sampled sound board AM_RANGE(0xe03000, 0xe0300f) AM_WRITE8(ic3ss_w,0xff00) // 6840PTM on sampled sound board
AM_RANGE(0xe04000, 0xe0400f) AM_READWRITE(bwb_characteriser16_r, bwb_characteriser16_w)//AM_READWRITE(adpcm_r, adpcm_w) CHR ? AM_RANGE(0xe04000, 0xe0400f) AM_READWRITE8(bwb_characteriser_r, bwb_characteriser_w, 0x00ff)//AM_READWRITE(adpcm_r, adpcm_w) CHR ?
ADDRESS_MAP_END ADDRESS_MAP_END
@ -1504,7 +1500,7 @@ Characteriser (CHR)
the 'challenge' part of the startup check is always the same the 'challenge' part of the startup check is always the same
*/ */
WRITE16_MEMBER(mpu4vid_state::characteriser16_w ) WRITE8_MEMBER(mpu4vid_state::vidcharacteriser_w )
{ {
int x; int x;
int call=(data&0xff); int call=(data&0xff);
@ -1535,7 +1531,7 @@ WRITE16_MEMBER(mpu4vid_state::characteriser16_w )
} }
READ16_MEMBER(mpu4vid_state::characteriser16_r ) READ8_MEMBER(mpu4vid_state::vidcharacteriser_r )
{ {
LOG_CHR_FULL(("%04x Characteriser read offset %02X,data %02X", space.device().safe_pcbase(),offset,m_current_chr_table[m_prot_col].response)); LOG_CHR_FULL(("%04x Characteriser read offset %02X,data %02X", space.device().safe_pcbase(),offset,m_current_chr_table[m_prot_col].response));
LOG_CHR(("Characteriser read offset %02X \n",offset)); LOG_CHR(("Characteriser read offset %02X \n",offset));
@ -1558,99 +1554,6 @@ READ16_MEMBER(mpu4vid_state::characteriser16_r )
} }
/*
BwB Characteriser (CHR)
The BwB method of protection is considerably different to the Barcrest one, with any
incorrect behaviour manifesting in ridiculously large payouts.
In fact, the software seems deliberately designed to mislead, but is (fortunately for
us) prone to similar weaknesses that allow a per game solution.
See mpu4hw.c for more info
As BwB games aren't yet booting on the 16-bit board, we're duplicating the 8-bit program
Precedent suggests this is not that dangerous an assumption to make.
*/
WRITE16_MEMBER(mpu4vid_state::bwb_characteriser16_w )
{
int x;
int call=(data &0xff);
LOG_CHR_FULL(("%04x Characteriser write offset %02X data %02X \n", space.device().safe_pcbase(),offset,data));
if (!m_current_chr_table)
{
logerror("No Characteriser Table @ %04x\n", space.device().safe_pcbase());
return;
}
if (offset == 0)
{
if (!m_chr_state)
{
m_chr_state=1;
m_chr_counter=0;
}
if (call == 0)
{
m_init_col ++;
}
else
{
m_init_col =0;
}
}
m_chr_value = space.machine().rand();
for (x = 0; x < 4; x++)
{
if (m_current_chr_table[(x)].call == call)
{
if (x == 0) // reinit
{
m_bwb_return = 0;
}
m_chr_value = bwb_chr_table_common[(m_bwb_return)];
m_bwb_return++;
break;
}
}
}
READ16_MEMBER(mpu4vid_state::bwb_characteriser16_r )
{
LOG_CHR(("Characteriser read offset %02X \n",offset));
if (offset ==0)
{
switch (m_chr_counter)
{
case 6:
case 13:
case 20:
case 27:
case 34:
{
return m_bwb_chr_table1[(((m_chr_counter + 1) / 7) - 1)].response;
}
default:
{
if (m_chr_counter > 34)
{
m_chr_counter = 35;
m_chr_state = 2;
}
m_chr_counter ++;
return m_chr_value;
}
}
}
else
{
return m_chr_value;
}
}
static mpu4_chr_table adders_data[64] = { static mpu4_chr_table adders_data[64] = {
{0x00, 0x00}, {0x1A, 0x8C}, {0x04, 0x64}, {0x10, 0x84}, {0x18, 0x84}, {0x0F, 0xC4}, {0x13, 0x84}, {0x1B, 0x84}, {0x00, 0x00}, {0x1A, 0x8C}, {0x04, 0x64}, {0x10, 0x84}, {0x18, 0x84}, {0x0F, 0xC4}, {0x13, 0x84}, {0x1B, 0x84},

8
src/mame/video/scn2674.c
View File

@ -496,7 +496,7 @@ void scn2674_device::scn2674_write_command(running_machine &machine, UINT8 data)
} }
READ16_MEMBER( scn2674_device::mpu4_vid_scn2674_r ) READ8_MEMBER( scn2674_device::mpu4_vid_scn2674_r )
{ {
/* /*
Offset: Purpose Offset: Purpose
@ -541,11 +541,11 @@ READ16_MEMBER( scn2674_device::mpu4_vid_scn2674_r )
case 7: LOG2674(("Read Screen2_h Register %06x\n",space.device().safe_pc()));return m_scn2674_screen2_h; case 7: LOG2674(("Read Screen2_h Register %06x\n",space.device().safe_pc()));return m_scn2674_screen2_h;
} }
return 0xffff; return 0xff;
} }
WRITE16_MEMBER( scn2674_device::mpu4_vid_scn2674_w ) WRITE8_MEMBER( scn2674_device::mpu4_vid_scn2674_w )
{ {
/* /*
Offset: Purpose Offset: Purpose
@ -559,8 +559,6 @@ WRITE16_MEMBER( scn2674_device::mpu4_vid_scn2674_w )
7 Screen Start 2 Upper Register 7 Screen Start 2 Upper Register
*/ */
data &=0x00ff; /* it's an 8-bit chip on a 16-bit board, feel the cheapness. */
switch (offset) switch (offset)
{ {
case 0: case 0:

4
src/mame/video/scn2674.h
View File

@ -31,8 +31,8 @@ public:
} }
// int m_gfx_index; // int m_gfx_index;
DECLARE_READ16_MEMBER( mpu4_vid_scn2674_r ); DECLARE_READ8_MEMBER( mpu4_vid_scn2674_r );
DECLARE_WRITE16_MEMBER( mpu4_vid_scn2674_w ); DECLARE_WRITE8_MEMBER( mpu4_vid_scn2674_w );
UINT8 get_irq_state( void ) UINT8 get_irq_state( void )
{ {