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Merge pull request #1041 from TomHarte/InST

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Switch the Atari ST to the newer 68000.
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Thomas Harte 2022-06-30 17:15:04 -04:00 committed by GitHub
commit 7cbee172b2
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1 changed files with 12 additions and 12 deletions
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24
Machines/Atari/ST/AtariST.cpp
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@ -13,7 +13,7 @@
//#define LOG_TRACE
//bool should_log = false;
#include "../../../Processors/68000/68000.hpp"
#include "../../../Processors/68000Mk2/68000Mk2.hpp"
#include "../../../Components/AY38910/AY38910.hpp"
#include "../../../Components/68901/MFP68901.hpp"
@ -43,7 +43,7 @@ constexpr int CLOCK_RATE = 8021247;
using Target = Analyser::Static::Target;
class ConcreteMachine:
public Atari::ST::Machine,
public CPU::MC68000::BusHandler,
public CPU::MC68000Mk2::BusHandler,
public MachineTypes::TimedMachine,
public MachineTypes::ScanProducer,
public MachineTypes::AudioProducer,
@ -154,11 +154,11 @@ class ConcreteMachine:
}
mc68000_.run_for(cycles);
flush();
}
// MARK: MC68000::BusHandler
using Microcycle = CPU::MC68000::Microcycle;
HalfCycles perform_bus_operation(const CPU::MC68000::Microcycle &cycle, int is_supervisor) {
template <typename Microcycle> HalfCycles perform_bus_operation(const Microcycle &cycle, int is_supervisor) {
// Just in case the last cycle was an interrupt acknowledge or bus error. TODO: find a better solution?
mc68000_.set_is_peripheral_address(false);
mc68000_.set_bus_error(false);
@ -187,7 +187,7 @@ class ConcreteMachine:
if(cycle.operation & Microcycle::SelectByte) {
const int interrupt = mfp_->acknowledge_interrupt();
if(interrupt != Motorola::MFP68901::MFP68901::NoAcknowledgement) {
cycle.value->halves.low = uint8_t(interrupt);
cycle.value->b = uint8_t(interrupt);
} else {
// TODO: this should take a while. Find out how long.
mc68000_.set_bus_error(true);
@ -256,10 +256,10 @@ class ConcreteMachine:
switch(cycle.operation & (Microcycle::SelectWord | Microcycle::SelectByte | Microcycle::Read)) {
default: break;
case Microcycle::SelectWord | Microcycle::Read:
*cycle.value = 0xffff;
cycle.value->w = 0xffff;
break;
case Microcycle::SelectByte | Microcycle::Read:
cycle.value->halves.low = 0xff;
cycle.value->b = 0xff;
break;
}
return delay;
@ -394,20 +394,20 @@ class ConcreteMachine:
break;
case Microcycle::SelectWord | Microcycle::Read:
cycle.value->full = *reinterpret_cast<uint16_t *>(&memory[address]);
cycle.value->w = *reinterpret_cast<uint16_t *>(&memory[address]);
break;
case Microcycle::SelectByte | Microcycle::Read:
cycle.value->halves.low = memory[address];
cycle.value->b = memory[address];
break;
case Microcycle::SelectWord:
if(address >= video_range_.low_address && address < video_range_.high_address)
video_.flush();
*reinterpret_cast<uint16_t *>(&memory[address]) = cycle.value->full;
*reinterpret_cast<uint16_t *>(&memory[address]) = cycle.value->w;
break;
case Microcycle::SelectByte:
if(address >= video_range_.low_address && address < video_range_.high_address)
video_.flush();
memory[address] = cycle.value->halves.low;
memory[address] = cycle.value->b;
break;
}
@ -471,7 +471,7 @@ class ConcreteMachine:
speaker_.run_for(audio_queue_, cycles_since_audio_update_.divide_cycles(Cycles(4)));
}
CPU::MC68000::Processor<ConcreteMachine, true> mc68000_;
CPU::MC68000Mk2::Processor<ConcreteMachine, true, true> mc68000_;
HalfCycles bus_phase_;
JustInTimeActor<Video> video_;