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mcd, preparations for msu support (arm version)

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This commit is contained in:
kub 2023-05-26 20:45:13 +00:00
parent 02ff025479
commit f27a1749fe
2 changed files with 25 additions and 25 deletions
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23
pico/cd/memory.c
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@ -95,6 +95,14 @@ void m68k_comm_check(u32 a)
}
}
u32 pcd_stopwatch_read(int sub)
{
// ugh..
u32 d = sub ? SekCyclesDoneS68k() : pcd_cycles_m68k_to_s68k(SekCyclesDone());
d = (d - Pico_mcd->m.stopwatch_base_c) / 384;
return d & 0x0fff;
}
#ifndef _ASM_CD_MEMORY_C
static u32 m68k_reg_read16(u32 a)
{
@ -121,14 +129,11 @@ static u32 m68k_reg_read16(u32 a)
case 8:
d = cdc_host_r();
goto end;
case 0xA:
case 0xa:
elprintf(EL_UIO, "m68k FIXME: reserved read");
goto end;
case 0xC: // 384 cycle stopwatch timer
// ugh..
d = pcd_cycles_m68k_to_s68k(SekCyclesDone());
d = (d - Pico_mcd->m.stopwatch_base_c) / 384;
d &= 0x0fff;
case 0xc: // 384 cycle stopwatch timer
d = pcd_stopwatch_read(0);
elprintf(EL_CDREGS, "m68k stopwatch timer read (%04x)", d);
goto end;
}
@ -331,10 +336,8 @@ u32 s68k_reg_read16(u32 a)
case 8:
d = cdc_host_r();
goto end;
case 0xC:
d = SekCyclesDoneS68k() - Pico_mcd->m.stopwatch_base_c;
d /= 384;
d &= 0x0fff;
case 0xc:
d = pcd_stopwatch_read(1);
elprintf(EL_CDREGS, "s68k stopwatch timer read (%04x)", d);
goto end;
case 0x30: