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AltairZ80: Updates prev PR to support Extended Mem

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The previous PR that added the "ROM" option to "load -h" did
not support extended memory. @psco provided an update that
corrects that problem.
This commit is contained in:
Patrick Linstruth 2024-09-03 20:52:28 -04:00
parent 0a22668b29
commit b3a1bc2466
1 changed files with 11 additions and 7 deletions
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18
AltairZ80/altairz80_cpu.c
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@ -209,6 +209,7 @@ uint32 getCommon(void);
uint32 sim_map_resource(uint32 baseaddr, uint32 size, uint32 resource_type,
int32 (*routine)(const int32, const int32, const int32), const char* name, uint8 unmap);
static void PutBYTEasROMorRAM(register uint32 Addr, const register uint32 Value, const register uint32 makeROM);
void PutBYTEExtended(register uint32 Addr, const register uint32 Value);
uint32 GetBYTEExtended(register uint32 Addr);
void cpu_raise_interrupt(uint32 irq);
@ -1937,6 +1938,15 @@ static void PutBYTE(register uint32 Addr, const register uint32 Value) {
}
}
static void PutBYTEasROMorRAM(register uint32 Addr, const register uint32 Value, const register uint32 makeROM) {
Addr &= ADDRMASK; /* registers are NOT guaranteed to be always 16-bit values */
if ((cpu_unit.flags & UNIT_CPU_BANKED) && (((common_low == 0) && (Addr < common)) || ((common_low == 1) && (Addr >= common))))
Addr |= bankSelect << MAXBANKSIZELOG2;
mmu_table[Addr >> LOG2PAGESIZE] = makeROM ? ROM_PAGE : RAM_PAGE;
M[Addr] = Value;
}
void PutBYTEExtended(register uint32 Addr, const register uint32 Value) {
MDEV m;
@ -7559,13 +7569,7 @@ static t_stat cpu_hex_load(FILE *fileref, CONST char *cptr, CONST char *fnam, in
}
bufptr += 2;
if (makeROM) {
mmu_table[addr >> LOG2PAGESIZE] = ROM_PAGE;
} else {
mmu_table[addr >> LOG2PAGESIZE] = RAM_PAGE;
}
M[addr++] = databyte;
PutBYTEasROMorRAM(addr++, databyte, makeROM);
chksum += databyte;
cnt++;