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pc8801.cpp: enable CD-ROM BIOS window as default in pc8801mc

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This commit is contained in:
angelosa 2022-01-17 13:28:59 +01:00
parent bb8bc4d497
commit f3ce398d3c
2 changed files with 25 additions and 17 deletions
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40
src/mame/drivers/pc8801.cpp
View File

@ -24,6 +24,7 @@
- below notes states that plain PC-8801 doesn't have a disk CPU, but the BIOS clearly checks
the floppy ports. Wrong info or check for external board anyway?
- fix "jumps" in PC-8872 mouse pointer (noticeable in balpower);
- pc8801mc: implement proper CD-ROM i/f (subset of PC Engine and PCFX);
per-game specific TODO (move to XML):
- Belloncho Shintai Kensa: hangs
@ -246,14 +247,14 @@
#define IRQ_DEBUG (0)
#define IRQ_LOG(x) do { if (IRQ_DEBUG) printf x; } while (0)
#define PC8801FH_OSC1 XTAL(28'636'363)
#define PC8801FH_OSC2 XTAL(42'105'200)
#define PC8801FH_OSC3 XTAL(31'948'800) // called OSC1 on PC-8801FE board
#define PC8801FH_OSC1 XTAL(28'636'363)
#define PC8801FH_OSC2 XTAL(42'105'200)
#define PC8801FH_OSC3 XTAL(31'948'800) // called OSC1 on PC-8801FE board
#define MASTER_CLOCK (PC8801FH_OSC3 / 8)
// TODO: exact clocks
#define PIXEL_CLOCK_15KHz (PC8801FH_OSC1 / 2)
#define PIXEL_CLOCK_24KHz XTAL(21'477'272) // should be (PC8801FH_OSC2 / 2)?
#define PIXEL_CLOCK_24KHz XTAL(21'477'272) // should be (PC8801FH_OSC2 / 2)?
/*
@ -1287,7 +1288,7 @@ void pc8801_state::pc8801_dmac_w(offs_t offset, uint8_t data)
uint8_t pc8801_state::pc8801_dmac_status_r()
{
printf("DMAC R STATUS\n");
//printf("DMAC R STATUS\n");
return 0xff;
}
@ -1297,8 +1298,8 @@ void pc8801_state::pc8801_dmac_mode_w(uint8_t data)
m_dmac_ff = 0;
// Valis II sets 0x20
if(data != 0xe4 && data != 0xa0 && data != 0xc4 && data != 0x80 && data != 0x00)
printf("%02x DMAC mode\n",data);
//if(data != 0xe4 && data != 0xa0 && data != 0xc4 && data != 0x80 && data != 0x00)
// printf("%02x DMAC mode\n",data);
}
uint8_t pc8801_state::pc8801_extram_mode_r()
@ -1398,22 +1399,26 @@ void pc8801_state::pc8801_dic_ctrl_w(uint8_t data)
m_dic_ctrl = (data ^ 1) & 1;
}
uint8_t pc8801_state::pc8801_cdrom_r()
/*
* [8] xxxx xxxx CD data
* ^ if bit 7 is held then system will bring to a
* "CD-System initialize\n[Space]->CD player" screen.
*/
uint8_t pc8801_state::pc8801_cdrom_r(offs_t offset)
{
//printf("CD-ROM read [%02x]\n",offset);
//if(m_has_cdrom)
// return m_cdrom_reg[offset];
if(m_has_cdrom)
return m_cdrom_reg[offset];
return 0xff;
}
/*
* [9] ---x ---- CD-ROM BIOS bank
* ---- ---x CD-ROM E-ROM bank (?)
*/
void pc8801_state::pc8801_cdrom_w(offs_t offset, uint8_t data)
{
/*
[9] ---x ---- CD-ROM BIOS bank
---- ---x CD-ROM E-ROM bank (?)
*/
//printf("CD-ROM write %02x -> [%02x]\n",data,offset);
if(m_has_cdrom)
@ -2191,6 +2196,9 @@ MACHINE_RESET_MEMBER(pc8801_state,pc8801_cdrom)
for(i=0;i<0x10;i++)
m_cdrom_reg[i] = 0;
}
// Hold STOP during boot to bypass CDROM BIOS at POST (PC=0x10)
m_cdrom_reg[9] = 0x10;
}
void pc8801_state::pc8801_palette(palette_device &palette) const

2
src/mame/includes/pc8801.h
View File

@ -203,7 +203,7 @@ private:
void pc8801_kanji_lv2_w(offs_t offset, uint8_t data);
void pc8801_dic_bank_w(uint8_t data);
void pc8801_dic_ctrl_w(uint8_t data);
uint8_t pc8801_cdrom_r();
uint8_t pc8801_cdrom_r(offs_t offset);
void pc8801_cdrom_w(offs_t offset, uint8_t data);
uint8_t pc8801_cpuclock_r();
uint8_t pc8801_baudrate_r();