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NesHawk - support the soft reset aspect to UNIF_BMC-42in1ResetSwitch

This commit is contained in:
adelikat 2016-02-05 13:43:22 -05:00
parent 0570de5637
commit c9ddf41e9d
1 changed files with 23 additions and 45 deletions
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68
BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/Mapper226.cs
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@ -5,58 +5,24 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
{
public sealed class Mapper226 : NES.NESBoardBase
{
/*
* Here are Disch's original notes:
========================
= Mapper 226 =
========================
Example Games:
--------------------------
76-in-1
Super 42-in-1
Registers:
---------------------------
Range, Mask: $8000-FFFF, $8001
$8000: [PMOP PPPP]
P = Low 6 bits of PRG Reg
M = Mirroring (0=Horz, 1=Vert)
O = PRG Mode
$8001: [.... ...H]
H = high bit of PRG
PRG Setup:
---------------------------
Low 6 bits of the PRG Reg come from $8000, high bit comes from $8001
$8000 $A000 $C000 $E000
+-------------------------------+
PRG Mode 0: | <Reg> |
+-------------------------------+
PRG Mode 1: | Reg | Reg |
+---------------+---------------+
*/
// http://wiki.nesdev.com/w/index.php/INES_Mapper_226
public int prg_page;
public bool prg_mode;
private int prg_mask_32k;
private int prg_mask_16k;
private bool resetFlag = false;
private bool resetSwitchMode = false;
public override bool Configure(NES.EDetectionOrigin origin)
{
switch (Cart.board_type)
{
case "MAPPER226":
break;
case "UNIF_BMC-42in1ResetSwitch":
resetSwitchMode = true;
break;
default:
return false;
@ -64,16 +30,26 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
prg_page = 0;
prg_mode = false;
prg_mask_32k = Cart.prg_size / 32 - 1;
prg_mask_16k = Cart.prg_size / 16 - 1;
prg_mask_32k = (Cart.prg_size / 2) / 32 - 1;
prg_mask_16k = (Cart.prg_size / 2) / 16 - 1;
return true;
}
public override void NESSoftReset()
{
resetFlag ^= true;
prg_page = 0;
prg_mode = false;
base.NESSoftReset();
}
public override void SyncState(Serializer ser)
{
ser.Sync("prg_page", ref prg_page);
ser.Sync("prg_mode", ref prg_mode);
ser.Sync("resetFlag", ref resetFlag);
ser.Sync("resetSwitchMode", ref resetSwitchMode);
base.SyncState(ser);
}
@ -104,13 +80,15 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
public override byte ReadPRG(int addr)
{
int baseAddr = resetSwitchMode && resetFlag ? 0x80000 : 0;
if (prg_mode == false)
{
return ROM[( ((prg_page >> 1) & prg_mask_32k) * 0x8000) + (addr & 0x07FFF)];
{
return ROM[baseAddr + (( ((prg_page >> 1) & prg_mask_32k) << 15) + (addr & 0x7FFF))];
}
else
{
return ROM[((prg_page & prg_mask_16k) * 0x4000) + (addr & 0x03FFF)];
return ROM[baseAddr + (((prg_page & prg_mask_16k) << 14) + (addr & 0x3FFF))];
}
}
}