ShuriZma
/
BizHawk
mirror of https://github.com/TASEmulators/BizHawk.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

commodore64: fix CIA timer bug, writes weren't always getting through to the registers

This commit is contained in:
saxxonpike 2012-11-12 17:23:15 +00:00
parent 2a5be0d42c
commit 25edebfb80
3 changed files with 7 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
BizHawk.Emulation/Computers/Commodore64/Cia.cs
View File

@ -305,6 +305,7 @@ namespace BizHawk.Emulation.Computers.Commodore64
public byte Read(ushort addr)
{
byte result;
addr &= 0xF;
switch (addr)
{
@ -377,6 +378,7 @@ namespace BizHawk.Emulation.Computers.Commodore64
public void Write(ushort addr, byte val)
{
addr &= 0xF;
switch (addr)
{
case 0x00:

3
BizHawk.Emulation/Computers/Commodore64/MemBus.cs
View File

@ -267,6 +267,8 @@ namespace BizHawk.Emulation.Computers.Commodore64
public void Poke(ushort addr, byte val)
{
return;
/*
if (addr == 0x0000)
{
cpuPort.Direction = val;
@ -315,6 +317,7 @@ namespace BizHawk.Emulation.Computers.Commodore64
ram[addr] = val;
}
}
*/
}
public void PokeRam(int addr, byte val)

6
BizHawk.Emulation/Computers/Commodore64/VicII.cs
View File

@ -750,6 +750,7 @@ namespace BizHawk.Emulation.Computers.Commodore64
PerformSpriteDataFetch(7);
break;
case 10:
signal.VicAEC = true;
PerformDRAMRefresh();
break;
case 11:
@ -889,6 +890,7 @@ namespace BizHawk.Emulation.Computers.Commodore64
PerformSpriteComparison();
break;
case 55:
signal.VicAEC = true;
PerformSpriteComparison();
break;
case 56:
@ -960,9 +962,6 @@ namespace BizHawk.Emulation.Computers.Commodore64
private void PerformSpriteComparison()
{
// reenable cpu if disabled
signal.VicAEC = true;
// sprite comparison
for (int i = 0; i < 8; i++)
{
@ -985,7 +984,6 @@ namespace BizHawk.Emulation.Computers.Commodore64
private void PerformSpriteDataFetch(int spriteIndex)
{
// second half of the fetch cycle
signal.VicAEC = !regs.MDMA[spriteIndex];
if (regs.MDMA[spriteIndex])
{
for (int i = 0; i < 2; i++)