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Obtains a Kickstart ROM, adds a 68000.

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This commit is contained in:
Thomas Harte 2021-07-16 21:07:12 -04:00
parent 7925dcc5a2
commit d1f3b5ed80
2 changed files with 34 additions and 4 deletions
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32
Machines/Amiga/Amiga.cpp
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@ -10,26 +10,54 @@
#include "../MachineTypes.hpp"
#include "../../Processors/68000/68000.hpp"
#include "../../Analyser/Static/Amiga/Target.hpp"
#include "../Utility/MemoryPacker.hpp"
#include "../Utility/MemoryFuzzer.hpp"
namespace Amiga {
class ConcreteMachine:
public CPU::MC68000::BusHandler,
public MachineTypes::ScanProducer,
public MachineTypes::TimedMachine,
public Machine {
public:
ConcreteMachine(const Analyser::Static::Amiga::Target &target, const ROMMachine::ROMFetcher &rom_fetcher) {
ConcreteMachine(const Analyser::Static::Amiga::Target &target, const ROMMachine::ROMFetcher &rom_fetcher) :
mc68000_(*this)
{
(void)target;
(void)rom_fetcher;
// Temporary: use a hard-coded Kickstart selection.
constexpr ROM::Name rom_name = ROM::Name::AmigaA500Kickstart13;
ROM::Request request(rom_name);
auto roms = rom_fetcher(request);
if(!request.validate(roms)) {
throw ROMMachine::Error::MissingROMs;
}
Memory::PackBigEndian16(roms.find(rom_name)->second, kickstart_);
// NTSC clock rate: 2*3.579545 = 7.15909Mhz.
// PAL clock rate: 7.09379Mhz.
set_clock_rate(7'093'790.0);
}
// MARK: - MC68000::BusHandler.
using Microcycle = CPU::MC68000::Microcycle;
HalfCycles perform_bus_operation(const CPU::MC68000::Microcycle &cycle, int is_supervisor) {
(void)cycle;
(void)is_supervisor;
return HalfCycles(0);
}
private:
CPU::MC68000::Processor<ConcreteMachine, true> mc68000_;
std::vector<uint8_t> kickstart_;
// MARK: - MachineTypes::ScanProducer.
void set_scan_target(Outputs::Display::ScanTarget *scan_target) final {
@ -43,7 +71,7 @@ class ConcreteMachine:
// MARK: - MachineTypes::TimedMachine.
void run_for(const Cycles cycles) {
(void)cycles;
mc68000_.run_for(cycles);
}
};

6
Machines/Utility/MemoryPacker.hpp
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@ -28,8 +28,10 @@ void PackBigEndian16(const std::vector<uint8_t> &source, uint8_t *target);
/*!
Copies the bytes from @c source into @c target, interpreting them
as big-endian 16-bit data. @c target will be resized to the proper size
exactly to contain the contents of @c source.
as big-endian 16-bit data and writing them as host-endian 16-bit data.
@c target will be resized to the proper size exactly to contain the contents
of @c source.
*/
void PackBigEndian16(const std::vector<uint8_t> &source, std::vector<uint16_t> &target);