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Adds the absolute basics to include a 6522 in the Macintosh.

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Not yet wired to anything.
This commit is contained in:
Thomas Harte 2019-05-03 23:40:22 -04:00
parent 417a3e1540
commit 6d6a4e79c9
1 changed files with 23 additions and 1 deletions
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24
Machines/Apple/Macintosh/Macintosh.cpp
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@ -27,7 +27,8 @@ class ConcreteMachine:
public:
ConcreteMachine(const ROMMachine::ROMFetcher &rom_fetcher) :
mc68000_(*this),
video_(ram_) {
video_(ram_),
via_(via_port_handler_) {
// Grab a copy of the ROM and convert it into big-endian data.
const auto roms = rom_fetcher("Macintosh", { "mac128k.rom" });
@ -53,9 +54,30 @@ class ConcreteMachine:
mc68000_.run_for(cycles);
}
HalfCycles perform_bus_operation(const CPU::MC68000::Microcycle &cycle, int is_supervisor) {
via_.run_for(cycle.length);
// TODO: the entirety of dealing with this cycle.
return HalfCycles(0);
}
/*
Notes to self: accesses to the VIA are via the 68000's
synchronous bus.
*/
private:
class VIAPortHandler: public MOS::MOS6522::PortHandler {
};
CPU::MC68000::Processor<ConcreteMachine, true> mc68000_;
Video video_;
MOS::MOS6522::MOS6522<VIAPortHandler> via_;
VIAPortHandler via_port_handler_;
uint16_t rom_[32*1024];
uint16_t ram_[64*1024];
};