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

c64- VIC bank switching via CIA2

This commit is contained in:
saxxonpike 2012-11-03 16:15:16 +00:00
parent 5955976216
commit 8182da2fcd
1 changed files with 10 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
BizHawk.Emulation/Computers/Commodore64/MemBus.cs
View File

@ -56,6 +56,8 @@ namespace BizHawk.Emulation.Computers.Commodore64
public MemoryLayout layout;
// ram
public byte cia2A;
public byte cia2B;
public byte[] colorRam;
public byte[] ram;
public ushort vicOffset;
@ -103,20 +105,26 @@ namespace BizHawk.Emulation.Computers.Commodore64
public byte CIA2ReadPortA()
{
return 0;
return cia2A;
}
public byte CIA2ReadPortB()
{
return 0;
return cia2B;
}
public void CIA2WritePortA(byte val, byte direction)
{
cia2A &= (byte)~direction;
cia2A |= (byte)(val & direction);
vicOffset = (ushort)((cia2A & 0x03) << 14);
}
public void CIA2WritePortB(byte val, byte direction)
{
cia2B &= (byte)~direction;
cia2B |= (byte)(val & direction);
}
public MemoryDesignation GetDesignation(ushort addr)