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Un-commented incautious debug register printf, added some notes"

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This commit is contained in:
Angelo Salese 2013-02-01 14:50:21 +00:00
parent 7f424eb78a
commit 0993d27284
1 changed files with 26 additions and 3 deletions
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29
src/mess/machine/psxcd.c
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@ -8,7 +8,7 @@
//
//#define debug_cdrom
#define debug_cdrom_registers
//#define debug_cdrom_registers
//#define skip_reads
//#define dump_subheader
//#define disable_xa_prefetch
@ -203,6 +203,14 @@ READ8_MEMBER( psxcd_device::read )
switch (offset&3)
{
/*
x--- ---- command/parameter busy flag
-x-- ---- data fifo full (active low)
--x- ---- response fifo empty (active low)
---x ---- parameter fifo full (active low)
---- x--- parameter fifo empty (active high)
---- --xx cmd mode
*/
case 0: ret=sr; break;
case 1:
ret=res;
@ -226,7 +234,7 @@ READ8_MEMBER( psxcd_device::read )
}
#ifdef debug_cdrom_registers
printf("cdrom: read byte %08x = %02x\n",offset,ret);
printf("cdrom: read byte %08x = %02x (PC=%08x)\n",offset,ret,space.device().safe_pc());
#endif
return ret;
@ -239,12 +247,15 @@ READ8_MEMBER( psxcd_device::read )
WRITE8_MEMBER( psxcd_device::write )
{
#ifdef debug_cdrom_registers
printf("cdrom: write byte %08x = %02x\n",offset,data);
printf("cdrom: write byte %08x = %02x (PC=%08x)\n",offset,data,space.device().safe_pc());
#endif
switch (offset&3)
{
case 0:
//if(data & 2)
// popmessage("cmdmode = %02x, contact MESSdev",data);
cmdmode=data&1;
if (cmdmode==0)
{
@ -309,10 +320,22 @@ WRITE8_MEMBER( psxcd_device::write )
} else
{
// ?flush buffer?
//if(data & 0xf8)
//popmessage("Interrupt enable register mode 1 [%02x] -> %02x",offset,data);
}
break;
/*
x--- ---- unknown
-x-- ---- Reset parameter FIFO
--x- ---- unknown (used on transitions, so it certainly resets something)
---x ---- Command start
---- -xxx Response received
*/
case 3:
//if(data & 0x78)
// popmessage("IRQ flag = %02x, contact MESSdev",data);
if (data==0x07)
{
if (cur_res)