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Added 2KHz timer to Aristocrat MK-5 HW [Angelo Salese]

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This commit is contained in:
Angelo Salese 2010-08-17 00:37:43 +00:00
parent f0b317cde6
commit ba756dfc3c
1 changed files with 30 additions and 2 deletions
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32
src/mame/drivers/aristmk5.c
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@ -19,6 +19,9 @@
- bp 0x34002a8: SRAM Check branch test (I2C)
- basically writes to the I2C clock/data then read-backs it
- bp 0x34002d0: 2KHz Timer branch test
bp 0x34002cc: it does various test with GO command reads (that are undefined on plain AA) and
IRQA status bit 0, that's "printer busy" on original AA but here it have a completely
different meaning.
- bp 0x34002f8: DRAM emulator branch tests
- R0 == 0 "DRAM emulator found"
- R0 == 1 "DRAM emulator found"
@ -40,6 +43,7 @@ extern INT16 memc_pages[(32*1024*1024)/(4096)]; // the logical RAM area is 32 me
extern void archimedes_request_irq_a(running_machine *machine, int mask);
extern UINT32 *archimedes_memc_physmem;
extern UINT8 i2c_clk;
static emu_timer *mk5_2KHz_timer;
static VIDEO_START(aristmk5)
{
@ -80,12 +84,27 @@ static WRITE32_HANDLER( mk5_i2c_w )
i2c_clk = (data & 0x80) >> 7;
}
static READ32_HANDLER( mk5_ioc_r )
{
if (offset*4 >= 0x200000 && offset*4 < 0x300000)
{
if((offset & 0x1f) == 18 || (offset & 0x1f) == 22 || (offset & 0x1f) == 26 || (offset & 0x1f) == 30)
{
/* reset 2KHz timer if a timer GO command is read */
ioc_regs[4] &= 0xfe;
timer_adjust_oneshot(mk5_2KHz_timer, ATTOTIME_IN_HZ(2000), 0);
}
}
return archimedes_ioc_r(space,offset,mem_mask);
}
static ADDRESS_MAP_START( aristmk5_map, ADDRESS_SPACE_PROGRAM, 32 )
AM_RANGE(0x00000000, 0x01ffffff) AM_READWRITE(archimedes_memc_logical_r, archimedes_memc_logical_w)
AM_RANGE(0x02000000, 0x02ffffff) AM_RAM AM_BASE(&archimedes_memc_physmem) /* physical RAM - 16 MB for now, should be 512k for the A310 */
AM_RANGE(0x03010420, 0x03010423) AM_WRITE(mk5_i2c_w)
AM_RANGE(0x03010810, 0x03010813) AM_READNOP //MK-5 specific, watchdog
AM_RANGE(0x03000000, 0x033fffff) AM_READWRITE(archimedes_ioc_r, archimedes_ioc_w)
AM_RANGE(0x03000000, 0x033fffff) AM_READWRITE(mk5_ioc_r, archimedes_ioc_w)
AM_RANGE(0x03400000, 0x035fffff) AM_ROM AM_REGION("maincpu", 0) AM_WRITE(archimedes_memc_page_w)
AM_RANGE(0x03600000, 0x037fffff) AM_READWRITE(archimedes_memc_r, archimedes_memc_w)
AM_RANGE(0x03800000, 0x039fffff) AM_READWRITE(archimedes_vidc_r, archimedes_vidc_w) //TODO: this is different here, it appears to contain palette data only
@ -100,18 +119,27 @@ static DRIVER_INIT( aristmk5 )
archimedes_driver_init(machine);
}
static TIMER_CALLBACK( mk5_2KHz_callback )
{
ioc_regs[4] |= 1;
timer_adjust_oneshot(mk5_2KHz_timer, attotime_never, 0);
}
static MACHINE_START( aristmk5 )
{
archimedes_init(machine);
// reset the DAC to centerline
dac_signed_data_w(machine->device("dac"), 0x80);
mk5_2KHz_timer = timer_alloc(machine, mk5_2KHz_callback, 0);
}
static MACHINE_RESET( aristmk5 )
{
archimedes_reset(machine);
ioc_regs[4]|=1; //set printer busy irq?
timer_adjust_oneshot(mk5_2KHz_timer, ATTOTIME_IN_HZ(2000), 0);
{
int i;