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Introduces the Mac Plus memory map.

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Albeit with no SCSI support yet.
This commit is contained in:
Thomas Harte 2019-08-02 22:26:40 -04:00
parent d67c5145c0
commit a07488cf1b
1 changed files with 61 additions and 17 deletions
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78
Machines/Apple/Macintosh/Macintosh.cpp
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@ -343,20 +343,47 @@ template <Analyser::Static::Macintosh::Target::Model model> class ConcreteMachin
void set_rom_is_overlay(bool rom_is_overlay) {
ROM_is_overlay_ = rom_is_overlay;
populate_memory_map([rom_is_overlay] (std::function<void(int target, BusDevice device)> map_to) {
// Addresses up to $80 0000 aren't affected by this bit.
if(rom_is_overlay) {
// Up to $60 0000 mirrors of the ROM alternate with unassigned areas every $10 0000 byes.
for(int c = 0; c <= 0x600000; c += 0x100000) {
map_to(c, ((c >> 20)&1) ? BusDevice::ROM : BusDevice::Unassigned);
}
map_to(0x800000, BusDevice::RAM);
} else {
map_to(0x400000, BusDevice::RAM);
map_to(0x500000, BusDevice::ROM);
map_to(0x800000, BusDevice::Unassigned);
}
});
using Model = Analyser::Static::Macintosh::Target::Model;
switch(model) {
case Model::Mac128k:
case Model::Mac512k:
case Model::Mac512ke:
populate_memory_map([rom_is_overlay] (std::function<void(int target, BusDevice device)> map_to) {
// Addresses up to $80 0000 aren't affected by this bit.
if(rom_is_overlay) {
// Up to $60 0000 mirrors of the ROM alternate with unassigned areas every $10 0000 byes.
for(int c = 0; c <= 0x600000; c += 0x100000) {
map_to(c, ((c >> 20)&1) ? BusDevice::ROM : BusDevice::Unassigned);
}
map_to(0x800000, BusDevice::RAM);
} else {
map_to(0x400000, BusDevice::RAM);
map_to(0x500000, BusDevice::ROM);
map_to(0x800000, BusDevice::Unassigned);
}
});
break;
case Model::MacPlus:
populate_memory_map([rom_is_overlay] (std::function<void(int target, BusDevice device)> map_to) {
// Addresses up to $80 0000 aren't affected by this bit.
if(rom_is_overlay) {
map_to(0x100000, BusDevice::ROM);
map_to(0x400000, BusDevice::Unassigned);
map_to(0x500000, BusDevice::ROM);
map_to(0x580000, BusDevice::Unassigned);
map_to(0x600000, BusDevice::SCSI);
map_to(0x800000, BusDevice::RAM);
} else {
map_to(0x400000, BusDevice::RAM);
map_to(0x500000, BusDevice::ROM);
map_to(0x580000, BusDevice::Unassigned);
map_to(0x600000, BusDevice::SCSI);
map_to(0x800000, BusDevice::Unassigned);
}
});
break;
}
}
bool video_is_outputting() {
@ -709,9 +736,26 @@ template <Analyser::Static::Macintosh::Target::Model model> class ConcreteMachin
});
break;
// case Model::MacPlus: {
// int segment = 0;
// } break;
case Model::MacPlus:
populate_memory_map([] (std::function<void(int target, BusDevice device)> map_to) {
map_to(0x100000, BusDevice::ROM);
map_to(0x400000, BusDevice::Unassigned);
map_to(0x500000, BusDevice::ROM);
map_to(0x580000, BusDevice::Unassigned);
map_to(0x600000, BusDevice::SCSI);
map_to(0x800000, BusDevice::RAM);
map_to(0x900000, BusDevice::Unassigned);
map_to(0xa00000, BusDevice::SCCReadResetPhase);
map_to(0xb00000, BusDevice::Unassigned);
map_to(0xc00000, BusDevice::SCCWrite);
map_to(0xd00000, BusDevice::Unassigned);
map_to(0xe00000, BusDevice::IWM);
map_to(0xe80000, BusDevice::Unassigned);
map_to(0xf00000, BusDevice::VIA);
map_to(0xf80000, BusDevice::PhaseRead);
map_to(0x1000000, BusDevice::Unassigned);
});
break;
}
}