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melonDS
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DSi: make ARM9-clock-selector actually work

This commit is contained in:
Arisotura 2020-08-17 19:15:45 +02:00
parent e27d55505f
commit ba373ca72a
4 changed files with 58 additions and 26 deletions
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35
src/DSi.cpp
View File

@ -699,20 +699,37 @@ void MapNWRAMRange(u32 cpu, u32 num, u32 val)
}
}
void ApplyNewRAMSize(u32 size)
{
switch (size)
{
case 0:
case 1:
NDS::MainRAMMask = 0x3FFFFF;
printf("RAM: 4MB\n");
break;
case 2:
case 3: // TODO: debug console w/ 32MB?
NDS::MainRAMMask = 0xFFFFFF;
printf("RAM: 16MB\n");
break;
}
}
void Set_SCFG_Clock9(u16 val)
{
SCFG_Clock9 = val & 0x0187;
return;
NDS::ARM9Timestamp >>= NDS::ARM9ClockShift;
NDS::ARM9Target >>= NDS::ARM9ClockShift;
printf("CLOCK9=%04X\n", val);
SCFG_Clock9 = val & 0x0187;
if (SCFG_Clock9 & (1<<0)) NDS::ARM9ClockShift = 2;
else NDS::ARM9ClockShift = 1;
NDS::ARM9Timestamp <<= NDS::ARM9ClockShift;
NDS::ARM9Target <<= NDS::ARM9ClockShift;
NDS::ARM9->UpdateRegionTimings(0x00000000, 0xFFFFFFFF);
}
@ -1549,6 +1566,10 @@ void ARM9IOWrite32(u32 addr, u32 val)
switch (addr)
{
case 0x04004008:
{
u32 oldram = (SCFG_EXT[0] >> 14) & 0x3;
u32 newram = (val >> 14) & 0x3;
SCFG_EXT[0] &= ~0x8007F19F;
SCFG_EXT[0] |= (val & 0x8007F19F);
SCFG_EXT[1] &= ~0x0000F080;
@ -1560,6 +1581,7 @@ void ARM9IOWrite32(u32 addr, u32 val)
case 1:
NDS::MainRAMMask = 0x3FFFFF;
printf("RAM: 4MB\n");
//baziderp=true;
break;
case 2:
case 3: // TODO: debug console w/ 32MB?
@ -1567,7 +1589,14 @@ void ARM9IOWrite32(u32 addr, u32 val)
printf("RAM: 16MB\n");
break;
}*/
// HAX!!
// a change to the RAM size setting is supposed to apply immediately (it does so on hardware)
// however, doing so will cause DS-mode app startup to break, because the change happens while the ARM7
// is still busy clearing/relocating shit
//if (newram != oldram)
// NDS::ScheduleEvent(NDS::Event_DSi_RAMSizeChange, false, 512*512*512, ApplyNewRAMSize, newram);
printf("from %08X, ARM7 %08X, %08X\n", NDS::GetPC(0), NDS::GetPC(1), NDS::ARM7->R[1]);
}
return;
case 0x04004040:

5
src/NDS.cpp
View File

@ -1817,15 +1817,16 @@ void debug(u32 param)
fwrite(&val, 4, 1, shit);
}
fclose(shit);*/
FILE*
shit = fopen("debug/dump9.bin", "wb");
shit = fopen("debug/picto9.bin", "wb");
for (u32 i = 0x02000000; i < 0x04000000; i+=4)
{
u32 val = DSi::ARM9Read32(i);
fwrite(&val, 4, 1, shit);
}
fclose(shit);
shit = fopen("debug/dump7.bin", "wb");
shit = fopen("debug/picto7.bin", "wb");
for (u32 i = 0x02000000; i < 0x04000000; i+=4)
{
u32 val = DSi::ARM7Read32(i);

2
src/NDS.h
View File

@ -47,6 +47,8 @@ enum
Event_DSi_SDIOTransfer,
Event_DSi_NWifi,
Event_DSi_RAMSizeChange,
Event_MAX
};