/**
* Handle word write access to IO memory.
*/
void IoMem_wput(uaecptr addr, uae_u32 val)
{
Uint32 idx;
/* Check if access is made by a new instruction or by the same instruction doing multiple word accesses */
if ( IoAccessInstrPrevClock == CyclesGlobalClockCounter )
IoAccessInstrCount++; /* Same instruction, increase access count */
else
{
IoAccessInstrPrevClock = CyclesGlobalClockCounter;
if ( ( table68k[ M68000_CurrentOpcode ].size == 1 )
&& ( OpcodeFamily != i_MVMEL ) && ( OpcodeFamily != i_MVMLE ) )
IoAccessInstrCount = 0; /* Instruction size is word and not a movem : no multiple accesses */
else
IoAccessInstrCount = 1; /* 1st access of a long or movem.w */
}
addr &= 0x00ffffff; /* Use a 24 bit address */
LOG_TRACE(TRACE_IOMEM_WR, "IO write.w $%06x = $%04x pc=%x\n", addr, val&0xffff, M68000_GetPC());
if (addr < 0x00ff8000 || !regs.s)
{
/* invalid memory addressing --> bus error */
M68000_BusError(addr, BUS_ERROR_WRITE, BUS_ERROR_SIZE_WORD, BUS_ERROR_ACCESS_DATA);
return;
}
if (addr > 0xfffffe)
{
fprintf(stderr, "Illegal IO memory access: IoMem_wput($%x)\n", addr);
return;
}
IoAccessBaseAddress = addr; /* Store for exception frame, just in case */
nIoMemAccessSize = SIZE_WORD;
nBusErrorAccesses = 0;
IoMem_WriteWord(addr, val);
idx = addr - 0xff8000;
IoAccessCurrentAddress = addr;
pInterceptWriteTable[idx](); /* Call 1st handler */
if (pInterceptWriteTable[idx+1] != pInterceptWriteTable[idx])
{
IoAccessCurrentAddress = addr + 1;
pInterceptWriteTable[idx+1](); /* Call 2nd handler */
}
/* Check if we wrote to a bus-error region */
if (nBusErrorAccesses == 2)
{
M68000_BusError(addr, BUS_ERROR_WRITE, BUS_ERROR_SIZE_WORD, BUS_ERROR_ACCESS_DATA);
}
}
/**
* Handle word write access to IO memory.
*/
void IoMem_wput(uaecptr addr, uae_u32 val)
{
Uint32 idx;
addr &= 0x00ffffff; /* Use a 24 bit address */
LOG_TRACE(TRACE_IOMEM_WR, "IO write.w $%06x = $%04x\n", addr, val&0x0ffff);
if (addr < 0x00ff8000 || !regs.s)
{
/* invalid memory addressing --> bus error */
M68000_BusError(addr, BUS_ERROR_WRITE);
return;
}
if (addr > 0xfffffe)
{
fprintf(stderr, "Illegal IO memory access: IoMem_wput($%x)\n", addr);
return;
}
IoAccessBaseAddress = addr; /* Store for exception frame, just in case */
nIoMemAccessSize = SIZE_WORD;
nBusErrorAccesses = 0;
IoMem_WriteWord(addr, val);
idx = addr - 0xff8000;
IoAccessCurrentAddress = addr;
pInterceptWriteTable[idx](); /* Call 1st handler */
if (pInterceptWriteTable[idx+1] != pInterceptWriteTable[idx])
{
IoAccessCurrentAddress = addr + 1;
pInterceptWriteTable[idx+1](); /* Call 2nd handler */
}
/* Check if we wrote to a bus-error region */
if (nBusErrorAccesses == 2)
{
M68000_BusError(addr, BUS_ERROR_WRITE);
}
}
/**
* Handle word write access to IO memory.
*/
void IoMem_wput(uaecptr addr, uae_u32 val)
{
Uint32 idx;
LOG_TRACE(TRACE_IOMEM_WR, "IO write.w $%06x = $%04x\n", addr, val&0xffff);
if ((addr & IO_SEG_MASK) >= IO_SIZE)
{
/* invalid memory addressing --> bus error */
M68000_BusError(addr, BUS_ERROR_WRITE);
return;
}
IoAccessBaseAddress = addr; /* Store for exception frame, just in case */
nIoMemAccessSize = SIZE_WORD;
nBusErrorAccesses = 0;
IoMem_WriteWord(addr, val);
idx = addr & IO_SEG_MASK;
IoAccessCurrentAddress = addr;
pInterceptWriteTable[idx](); /* Call 1st handler */
if (pInterceptWriteTable[idx+1] != pInterceptWriteTable[idx])
{
IoAccessCurrentAddress = addr + 1;
pInterceptWriteTable[idx+1](); /* Call 2nd handler */
}
/* Check if we wrote to a bus-error region */
if (nBusErrorAccesses == 2)
{
M68000_BusError(addr, BUS_ERROR_WRITE);
}
}
/**
* Read word from sound control register (0xff8900).
*/
void DmaSnd_SoundControl_ReadWord(void)
{
IoMem_WriteWord(0xff8900, nDmaSoundControl);
HATARI_TRACE(HATARI_TRACE_DMASND, "DMA snd control write: 0x%04x\n", nDmaSoundControl);
}
/**
* Read from STE joypad buttons register (0xff9200)
*/
void Joy_StePadButtons_ReadWord(void)
{
Uint16 nData = 0xffff;
if (ConfigureParams.Joysticks.Joy[JOYID_STEPADA].nJoystickMode != JOYSTICK_DISABLED
&& (nSteJoySelect & 0x0f) != 0x0f)
{
int nButtons = Joy_GetFireButtons(JOYID_STEPADA);
if (!(nSteJoySelect & 0x1))
{
if (nButtons & 0x01) /* Fire button A pressed? */
nData &= ~2;
if (nButtons & 0x10) /* Fire button PAUSE pressed? */
nData &= ~1;
}
else if (!(nSteJoySelect & 0x2))
{
if (nButtons & 0x02) /* Fire button B pressed? */
nData &= ~2;
}
else if (!(nSteJoySelect & 0x4))
{
if (nButtons & 0x04) /* Fire button C pressed? */
nData &= ~2;
}
else if (!(nSteJoySelect & 0x8))
{
if (nButtons & 0x08) /* Fire button OPTION pressed? */
nData &= ~2;
}
}
if (ConfigureParams.Joysticks.Joy[JOYID_STEPADB].nJoystickMode != JOYSTICK_DISABLED
&& (nSteJoySelect & 0xf0) != 0xf0)
{
int nButtons = Joy_GetFireButtons(JOYID_STEPADB);
if (!(nSteJoySelect & 0x10))
{
if (nButtons & 0x01) /* Fire button A pressed? */
nData &= ~8;
if (nButtons & 0x10) /* Fire button PAUSE pressed? */
nData &= ~4;
}
else if (!(nSteJoySelect & 0x20))
{
if (nButtons & 0x02) /* Fire button B pressed? */
nData &= ~8;
}
else if (!(nSteJoySelect & 0x40))
{
if (nButtons & 0x04) /* Fire button C pressed? */
nData &= ~8;
}
else if (!(nSteJoySelect & 0x80))
{
if (nButtons & 0x08) /* Fire button OPTION pressed? */
nData &= ~8;
}
}
Dprintf(("0xff9200 -> 0x%04x\n", nData));
IoMem_WriteWord(0xff9200, nData);
}
