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MMU: add (experimental) support for writing to VCount. This is apparently required for proper multiplayer sync.

This commit is contained in:
luigi__ 2011-12-25 18:17:36 +00:00
parent 07ed2680a5
commit 97b5a7ed1d
1 changed files with 13 additions and 0 deletions
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13
desmume/src/MMU.cpp
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@ -1870,6 +1870,9 @@ if(_startmode==0 && wordcount==1) {
int zzz=9; int zzz=9;
} }
if (enable && procnum==1 && (!(chan&1)) && _startmode==6)
printf("!!!---!!! WIFI DMA: %08X TO %08X, %i WORDS !!!---!!!\n", saddr, daddr, wordcount);
//analyze enabling and startmode. //analyze enabling and startmode.
//note that we only do this if the dma was freshly enabled. //note that we only do this if the dma was freshly enabled.
//we should probably also only be latching these other regs in that case too.. //we should probably also only be latching these other regs in that case too..
@ -3824,6 +3827,16 @@ void FASTCALL _MMU_ARM7_write16(u32 adr, u16 val)
//Address is an IO register //Address is an IO register
switch(adr) switch(adr)
{ {
case REG_DISPA_VCOUNT:
if (nds.VCount >= 202 && nds.VCount <= 212)
{
printf("VCOUNT set to %i (previous value %i)\n", val, nds.VCount);
nds.VCount = val;
}
else
printf("Attempt to set VCOUNT while not within 202-212 (%i), ignored\n", nds.VCount);
return;
case REG_RTC: case REG_RTC:
rtcWrite(val); rtcWrite(val);
break; break;