Emulation/ProjectPSX
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Access to different than 32b load write

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This commit is contained in:
Blue 2019-01-21 00:13:36 +01:00
parent bbe74f6bbd
commit ece128b5dd
1 changed files with 104 additions and 3 deletions
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107
ProjectPSX/PSX/MMU.cs
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@ -15,15 +15,17 @@ namespace ProjectPSX {
if (addr % 4 != 0) {
Console.WriteLine("UNALIGNED READ");
}
//Console.WriteLine("READ ADDR: " + addr.ToString("x4"));
switch (addr) {
case uint KUSEG when addr >= 0x0000_0000 && addr < 0x1F00_0000:
case uint KSEG0 when addr >= 0x8000_0000 && addr < 0x9F00_0000:
case uint KSEG1 when addr >= 0xA000_0000 && addr < 0xBF00_0000:
addr &= 0x1F_FFFF;
return (uint)((RAM[addr + 3] << 24) | (RAM[addr + 2] << 16) | (RAM[addr + 1] << 8) | RAM[addr]);
case uint KUSEG when addr >= 0x1F00_0000 && addr < 0x1F80_0000:
case uint KSEG0 when addr >= 0x9F00_0000 && addr < 0x9F80_0000:
case uint KSEG1 when addr >= 0xBF00_0000 && addr < 0xBF80_0000:
if (addr == 0x1f000084) return 0xFFFF_FFFF; //todo look if this is needed EX1 IO port
addr &= 0x7F_FFFF;
return (uint)((EX1[addr + 3] << 24) | (EX1[addr + 2] << 16) | (EX1[addr + 1] << 8) | EX1[addr]);
case uint KUSEG when addr >= 0x1F80_0000 && addr < 0x1F80_0400: //Warning: _1000
@ -45,7 +47,7 @@ namespace ProjectPSX {
addr &= 0x1FF;
return (uint)((IO[addr + 3] << 24) | (IO[addr + 2] << 16) | (IO[addr + 1] << 8) | IO[addr]);
default:
Console.WriteLine("Unsupported READ AREA");
Console.WriteLine("Unsupported READ AREA: " + addr.ToString("x4"));
return 0xFFFF_FFFF;
}
}
@ -59,6 +61,7 @@ namespace ProjectPSX {
case uint KUSEG when addr >= 0x0000_0000 && addr < 0x1F00_0000:
case uint KSEG0 when addr >= 0x8000_0000 && addr < 0x9F00_0000:
case uint KSEG1 when addr >= 0xA000_0000 && addr < 0xBF00_0000:
addr &= 0x1F_FFFF;
RAM[addr] = (byte)(value);
RAM[addr + 1] = (byte)(value >> 8);
RAM[addr + 2] = (byte)(value >> 16);
@ -85,7 +88,6 @@ namespace ProjectPSX {
case uint KUSEG when addr >= 0x1F80_1000 && addr < 0x1F80_3000:
case uint KSEG0 when addr >= 0x9F80_1000 && addr < 0x9F80_3000:
case uint KSEG1 when addr >= 0xBF80_1000 && addr < 0xBF80_3000:
uint a = addr;
addr &= 0x1FFF;
REGISTERS[addr] = (byte)(value);
REGISTERS[addr + 1] = (byte)(value >> 8);
@ -129,6 +131,105 @@ namespace ProjectPSX {
*/
}
internal void write8(uint addr, byte value) {
if (addr % 1 != 0) {
Console.WriteLine("UNALIGNED WRITE");
}
//Console.WriteLine("Write Addres Byte: " + addr.ToString("x4"));
switch (addr) {
case uint KUSEG when addr >= 0x0000_0000 && addr < 0x1F00_0000:
case uint KSEG0 when addr >= 0x8000_0000 && addr < 0x9F00_0000:
case uint KSEG1 when addr >= 0xA000_0000 && addr < 0xBF00_0000:
addr &= 0x1F_FFFF;
RAM[addr] = (byte)(value);
break;
case uint KUSEG when addr >= 0x1F00_0000 && addr < 0x1F80_0000:
case uint KSEG0 when addr >= 0x9F00_0000 && addr < 0x9F80_0000:
case uint KSEG1 when addr >= 0xBF00_0000 && addr < 0xBF80_0000:
addr &= 0x7F_FFFF;
EX1[addr] = (byte)(value);
break;
case uint KUSEG when addr >= 0x1F80_0000 && addr < 0x1F80_0400: //Warning: _1000
case uint KSEG0 when addr >= 0x9F80_0000 && addr < 0x9F80_0400: //Warning: _1000
case uint KSEG1 when addr >= 0xBF80_0000 && addr < 0xBF80_0400: //Warning: _1000
addr &= 0xFFF;
SCRATHPAD[addr] = (byte)(value);
break;
case uint KUSEG when addr >= 0x1F80_1000 && addr < 0x1F80_3000:
case uint KSEG0 when addr >= 0x9F80_1000 && addr < 0x9F80_3000:
case uint KSEG1 when addr >= 0xBF80_1000 && addr < 0xBF80_3000:
addr &= 0x1FFF;
REGISTERS[addr] = (byte)(value);
break;
case uint KUSEG when addr >= 0x1FC0_0000 && addr < 0x1FC8_0000:
case uint KSEG0 when addr >= 0x9FC0_0000 && addr < 0x9FC8_0000:
case uint KSEG1 when addr >= 0xBFC0_0000 && addr < 0xBFC8_0000: //BIOS mem map
addr &= 0x7_FFFF;
BIOS[addr] = (byte)(value);
break;
case uint KSEG2 when addr >= 0xFFFE_0000 && addr < 0xFFFE_0200:
addr &= 0x1FF;
IO[addr] = (byte)(value);
break;
default:
Console.WriteLine("Unsupported WRITE AREA: " + addr.ToString("x4") + ": " + value.ToString("x4"));
break;
}
}
internal void write16(uint addr, ushort value) {
if (addr % 2 != 0) {
Console.WriteLine("UNALIGNED WRITE");
}
switch (addr) {
case uint KUSEG when addr >= 0x0000_0000 && addr < 0x1F00_0000:
case uint KSEG0 when addr >= 0x8000_0000 && addr < 0x9F00_0000:
case uint KSEG1 when addr >= 0xA000_0000 && addr < 0xBF00_0000:
addr &= 0x1F_FFFF;
RAM[addr] = (byte)(value);
RAM[addr + 1] = (byte)(value >> 8);
break;
case uint KUSEG when addr >= 0x1F00_0000 && addr < 0x1F80_0000:
case uint KSEG0 when addr >= 0x9F00_0000 && addr < 0x9F80_0000:
case uint KSEG1 when addr >= 0xBF00_0000 && addr < 0xBF80_0000:
addr &= 0x7F_FFFF;
EX1[addr] = (byte)(value);
EX1[addr + 1] = (byte)(value >> 8);
break;
case uint KUSEG when addr >= 0x1F80_0000 && addr < 0x1F80_0400: //Warning: _1000
case uint KSEG0 when addr >= 0x9F80_0000 && addr < 0x9F80_0400: //Warning: _1000
case uint KSEG1 when addr >= 0xBF80_0000 && addr < 0xBF80_0400: //Warning: _1000
addr &= 0xFFF;
SCRATHPAD[addr] = (byte)(value);
SCRATHPAD[addr + 1] = (byte)(value >> 8);
break;
case uint KUSEG when addr >= 0x1F80_1000 && addr < 0x1F80_3000:
case uint KSEG0 when addr >= 0x9F80_1000 && addr < 0x9F80_3000:
case uint KSEG1 when addr >= 0xBF80_1000 && addr < 0xBF80_3000:
addr &= 0x1FFF;
REGISTERS[addr] = (byte)(value);
REGISTERS[addr + 1] = (byte)(value >> 8);
break;
case uint KUSEG when addr >= 0x1FC0_0000 && addr < 0x1FC8_0000:
case uint KSEG0 when addr >= 0x9FC0_0000 && addr < 0x9FC8_0000:
case uint KSEG1 when addr >= 0xBFC0_0000 && addr < 0xBFC8_0000: //BIOS mem map
addr &= 0x7_FFFF;
BIOS[addr] = (byte)(value);
BIOS[addr + 1] = (byte)(value >> 8);
break;
case uint KSEG2 when addr >= 0xFFFE_0000 && addr < 0xFFFE_0200:
addr &= 0x1FF;
IO[addr] = (byte)(value);
IO[addr + 1] = (byte)(value >> 8);
break;
default:
Console.WriteLine("Unsupported WRITE AREA: " + addr.ToString("x4") + ": " + value.ToString("x4"));
break;
}
}
internal void loadBios() {
byte[] rom = File.ReadAllBytes("./SCPH1001.BIN");
Array.Copy(rom, 0, BIOS, 0, rom.Length);