/**
* Create 'intercept' tables for hardware address access. Each 'intercept
*/
void IoMem_Init(void)
{
Uint32 addr;
int i;
const INTERCEPT_ACCESS_FUNC *pInterceptAccessFuncs = NULL;
/* Set default IO access handler (-> bus error) */
IoMem_SetBusErrorRegion(0x02000000, 0x0201FFFF);
if (ConfigureParams.System.bTurbo) {
pInterceptAccessFuncs = IoMemTable_Turbo;
} else {
pInterceptAccessFuncs = IoMemTable_NEXT;
}
/* Now set the correct handlers */
for (addr=0x02000000; addr <= 0x0201FFFF; addr++)
{
/* Does this hardware location/span appear in our list of possible intercepted functions? */
for (i=0; pInterceptAccessFuncs[i].Address != 0; i++)
{
if (addr >= pInterceptAccessFuncs[i].Address
&& addr < pInterceptAccessFuncs[i].Address+pInterceptAccessFuncs[i].SpanInBytes)
{
/* Security checks... */
if (pInterceptReadTable[addr & 0x1FFFF] != IoMem_BusErrorEvenReadAccess && pInterceptReadTable[addr&0x1FFFF] != IoMem_BusErrorOddReadAccess)
fprintf(stderr, "IoMem_Init: Warning: $%x (R) already defined\n", addr);
if (pInterceptWriteTable[addr& 0x1FFFF] != IoMem_BusErrorEvenWriteAccess && pInterceptWriteTable[addr&0x1FFFF] != IoMem_BusErrorOddWriteAccess)
fprintf(stderr, "IoMem_Init: Warning: $%x (W) already defined\n", addr);
/* This location needs to be intercepted, so add entry to list */
pInterceptReadTable[addr& 0x1FFFF] = pInterceptAccessFuncs[i].ReadFunc;
pInterceptWriteTable[addr& 0x1FFFF] = pInterceptAccessFuncs[i].WriteFunc;
}
}
}
}
/**
* Create 'intercept' tables for hardware address access. Each 'intercept
* table is a list of 0x8000 pointers to a list of functions to call when
* that location in the ST's memory is accessed.
*/
void IoMem_Init(void)
{
Uint32 addr;
int i;
const INTERCEPT_ACCESS_FUNC *pInterceptAccessFuncs = NULL;
/* Set default IO access handler (-> bus error) */
IoMem_SetBusErrorRegion(0xff8000, 0xffffff);
/* Initialize STe bus specific registers for Falcon in FALCON STe compatible bus mode */
if ((ConfigureParams.System.nMachineType == MACHINE_FALCON) && (falconBusMode == STE_BUS_COMPATIBLE)) {
for (addr = 0xff8000; addr < 0xffd426; addr++)
{
if ( ((addr >= 0xff8002) && (addr < 0xff8006)) ||
((addr >= 0xff8008) && (addr < 0xff800c)) ||
((addr >= 0xff800e) && (addr < 0xff8060)) ||
((addr >= 0xff8064) && (addr < 0xff8200)) ||
((addr >= 0xff82c4) && (addr < 0xff8400)) ||
(addr == 0xff8560) ||
(addr == 0xff8564) ||
((addr >= 0xff8804) && (addr < 0xff8900)) ||
((addr >= 0xff8964) && (addr < 0xff8970)) ||
((addr >= 0xff8c00) && (addr < 0xff8c80)) ||
((addr >= 0xff8c88) && (addr < 0xff8d00)) ||
((addr >= 0xff9000) && (addr < 0xff9200)) ||
((addr >= 0xff9204) && (addr < 0xff9206)) ||
((addr >= 0xff9207) && (addr < 0xff9210)) ||
((addr >= 0xff9218) && (addr < 0xff9220)) ||
((addr >= 0xff9224) && (addr < 0xff9800)) ||
((addr >= 0xff9c00) && (addr < 0xffa000)) ||
((addr >= 0xffa200) && (addr < 0xffa208)) ||
(addr == 0xffc020) ||
(addr == 0xffc021) ||
(addr == 0xffd020) ||
(addr == 0xffd021) ||
(addr == 0xffd420) ||
(addr == 0xffd421) ||
(addr == 0xffd425)
) {
pInterceptReadTable[addr - 0xff8000] = IoMem_VoidRead; /* For 'read' */
pInterceptWriteTable[addr - 0xff8000] = IoMem_VoidWrite; /* and 'write' */
}
}
}
switch (ConfigureParams.System.nMachineType)
{
case MACHINE_ST: pInterceptAccessFuncs = IoMemTable_ST; break;
case MACHINE_STE: pInterceptAccessFuncs = IoMemTable_STE; break;
case MACHINE_TT: pInterceptAccessFuncs = IoMemTable_TT; break;
case MACHINE_FALCON: pInterceptAccessFuncs = IoMemTable_Falcon; break;
default: abort(); /* bug */
}
/* Now set the correct handlers */
for (addr=0xff8000; addr <= 0xffffff; addr++)
{
/* Does this hardware location/span appear in our list of possible intercepted functions? */
for (i=0; pInterceptAccessFuncs[i].Address != 0; i++)
{
if (addr >= pInterceptAccessFuncs[i].Address
&& addr < pInterceptAccessFuncs[i].Address+pInterceptAccessFuncs[i].SpanInBytes)
{
/* Security checks... */
if (pInterceptReadTable[addr-0xff8000] != IoMem_BusErrorEvenReadAccess && pInterceptReadTable[addr-0xff8000] != IoMem_BusErrorOddReadAccess)
fprintf(stderr, "IoMem_Init: Warning: $%x (R) already defined\n", addr);
if (pInterceptWriteTable[addr-0xff8000] != IoMem_BusErrorEvenWriteAccess && pInterceptWriteTable[addr-0xff8000] != IoMem_BusErrorOddWriteAccess)
fprintf(stderr, "IoMem_Init: Warning: $%x (W) already defined\n", addr);
/* This location needs to be intercepted, so add entry to list */
pInterceptReadTable[addr-0xff8000] = pInterceptAccessFuncs[i].ReadFunc;
pInterceptWriteTable[addr-0xff8000] = pInterceptAccessFuncs[i].WriteFunc;
}
}
}
/* Set registers for Falcon DSP emulation */
if (ConfigureParams.System.nMachineType == MACHINE_FALCON)
{
switch (ConfigureParams.System.nDSPType)
{
#if ENABLE_DSP_EMU
case DSP_TYPE_EMU:
IoMemTabFalcon_DSPemulation(pInterceptReadTable,
pInterceptWriteTable);
break;
#endif
case DSP_TYPE_DUMMY:
IoMemTabFalcon_DSPdummy(pInterceptReadTable,
pInterceptWriteTable);
break;
default:
/* none */
IoMemTabFalcon_DSPnone(pInterceptReadTable,
pInterceptWriteTable);
}
}
/* Disable blitter? */
if (!ConfigureParams.System.bBlitter && ConfigureParams.System.nMachineType == MACHINE_ST)
{
IoMem_SetBusErrorRegion(0xff8a00, 0xff8a3f);
}
/* Disable real time clock? */
if (!ConfigureParams.System.bRealTimeClock)
{
for (addr = 0xfffc21; addr <= 0xfffc3f; addr++)
{
pInterceptReadTable[addr - 0xff8000] = IoMem_VoidRead; /* For 'read' */
pInterceptWriteTable[addr - 0xff8000] = IoMem_VoidWrite; /* and 'write' */
}
}
/* Initialize PSG shadow registers for ST, STe, TT machines */
if (ConfigureParams.System.nMachineType != MACHINE_FALCON)
{
for (addr = 0xff8804; addr < 0xff8900; addr++)
{
pInterceptReadTable[addr - 0xff8000] = pInterceptReadTable[(addr & 0xfff803) - 0xff8000];
pInterceptWriteTable[addr - 0xff8000] = pInterceptWriteTable[(addr & 0xfff803) - 0xff8000];
}
}
else {
/* Initialize PSG shadow registers for Falcon machine when in STe bus compatibility mode */
if (falconBusMode == STE_BUS_COMPATIBLE) {
for (addr = 0xff8804; addr < 0xff8900; addr++)
{
pInterceptReadTable[addr - 0xff8000] = IoMem_VoidRead; /* For 'read' */
pInterceptWriteTable[addr - 0xff8000] = IoMem_VoidWrite; /* and 'write' */
}
}
}
}
