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Naomi: proper read/write handlers for memory area 0x600000

This commit is contained in:
Flyinghead 2018-10-22 17:35:08 +02:00
parent af1b2da0bf
commit efcb95b4ee
1 changed files with 24 additions and 4 deletions
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28
core/hw/naomi/naomi.cpp
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@ -814,7 +814,6 @@ void Update_naomi()
static u8 mem600[0x800];
u32 libExtDevice_ReadMem_A0_006(u32 addr,u32 size) {
verify(size == 1);
addr &= 0x7ff;
//printf("libExtDevice_ReadMem_A0_006 %d@%08x: %x\n", size, addr, mem600[addr]);
switch (addr)
@ -828,10 +827,18 @@ u32 libExtDevice_ReadMem_A0_006(u32 addr,u32 size) {
// printf("NAOMI 600284 read %x\n", mem600[addr]);
break;
}
return mem600[addr];
switch (size)
{
case 1:
return mem600[addr];
case 2:
return *(u16 *)&mem600[addr & ~1];
case 4:
return *(u32 *)&mem600[addr & ~3];
}
}
void libExtDevice_WriteMem_A0_006(u32 addr,u32 data,u32 size) {
verify(size == 1);
addr &= 0x7ff;
//printf("libExtDevice_WriteMem_A0_006 %d@%08x: %x\n", size, addr, data);
switch (addr)
@ -842,5 +849,18 @@ void libExtDevice_WriteMem_A0_006(u32 addr,u32 data,u32 size) {
default:
break;
}
mem600[addr] = data;
switch (size)
{
case 1:
mem600[addr] = data;
break;
case 2:
if ((addr & 1) == 0)
*(u16 *)&mem600[addr] = data;
break;
case 4:
if ((addr & 3) == 0)
*(u32 *)&mem600[addr] = data;
break;
}
}