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Mapper 449: Add DIP switch/solder pad functionality

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This commit is contained in:
NewRisingSun
2022-07-28 21:14:59 +02:00
parent c9ca9204b5
commit e96b1f7db8
1 changed files with 14 additions and 2 deletions
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16
src/boards/449.c
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@@ -22,11 +22,13 @@
static uint16 latchAddr; static uint16 latchAddr;
static uint8 latchData; static uint8 latchData;
static uint8 dipswitch;
static SFORMAT StateRegs[] = static SFORMAT StateRegs[] =
{ {
{ &latchAddr, 2, "ADDR" }, { &latchAddr, 2, "ADDR" },
{ &latchData, 1, "DATA" }, { &latchData, 1, "DATA" },
{ &latchData, 1, "DIPS" },
{ 0 } { 0 }
}; };
@@ -54,6 +56,14 @@ static void Mapper449_Sync(void)
setmirror(latchAddr &0x002? MI_H: MI_V); setmirror(latchAddr &0x002? MI_H: MI_V);
} }
static DECLFR(Mapper449_Read)
{
if (latchAddr &0x200)
return CartBR(A | dipswitch);
else
return CartBR(A);
}
static DECLFW(Mapper449_WriteLatch) static DECLFW(Mapper449_WriteLatch)
{ {
latchData =V; latchData =V;
@@ -63,16 +73,18 @@ static DECLFW(Mapper449_WriteLatch)
static void Mapper449_Reset(void) static void Mapper449_Reset(void)
{ {
dipswitch =(dipswitch +1) &0xF;
latchAddr =latchData =0; latchAddr =latchData =0;
Mapper449_Sync(); Mapper449_Sync();
} }
static void Mapper449_Power(void) static void Mapper449_Power(void)
{ {
latchAddr =latchData =0; dipswitch =latchAddr =latchData =0;
Mapper449_Sync(); Mapper449_Sync();
SetWriteHandler(0x8000, 0xFFFF, Mapper449_WriteLatch); SetWriteHandler(0x8000, 0xFFFF, Mapper449_WriteLatch);
SetReadHandler(0x6000, 0xFFFF, CartBR); SetReadHandler(0x6000, 0x7FFF, CartBR);
SetReadHandler(0x8000, 0xFFFF, Mapper449_Read);
} }
void Mapper449_Init(CartInfo *info) void Mapper449_Init(CartInfo *info)