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The Apple II now has a functioning processor, ROM and RAM.

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This commit is contained in:
Thomas Harte 2018-04-14 21:41:26 -04:00
parent e599e65087
commit 71adb964e5
1 changed files with 42 additions and 1 deletions
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43
Machines/AppleII/AppleII.cpp
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@ -9,6 +9,9 @@
#include "AppleII.hpp"
#include "../CRTMachine.hpp"
#include "../Utility/MemoryFuzzer.hpp"
#include "../../Processors/6502/6502.hpp"
#include "Video.hpp"
@ -18,11 +21,14 @@ namespace {
class ConcreteMachine:
public CRTMachine::Machine,
public CPU::MOS6502::BusHandler,
public AppleII::Machine {
public:
ConcreteMachine() {
ConcreteMachine():
m6502_(*this) {
set_clock_rate(1022727);
Memory::Fuzz(ram_, sizeof(ram_));
}
void setup_output(float aspect_ratio) override {
@ -42,10 +48,45 @@ class ConcreteMachine:
}
void run_for(const Cycles cycles) override {
m6502_.run_for(cycles);
}
Cycles perform_bus_operation(CPU::MOS6502::BusOperation operation, uint16_t address, uint8_t *value) {
if(isReadOperation(operation)) {
if(address < sizeof(ram_)) {
*value = ram_[address];
} else if(address >= rom_start_address_) {
*value = rom_[address - rom_start_address_];
}
} else {
if(address < sizeof(ram_)) {
ram_[address] = *value;
}
}
return Cycles(1);
}
bool set_rom_fetcher(const std::function<std::vector<std::unique_ptr<std::vector<uint8_t>>>(const std::string &machine, const std::vector<std::string> &names)> &roms_with_names) override {
auto roms = roms_with_names(
"AppleII",
{
"apple2o.rom"
});
if(!roms[0]) return false;
rom_ = std::move(*roms[0]);
rom_start_address_ = static_cast<uint16_t>(0x10000 - rom_.size());
return true;
}
private:
CPU::MOS6502::Processor<ConcreteMachine, false> m6502_;
std::unique_ptr<AppleII::Video> video_;
uint8_t ram_[48*1024];
std::vector<uint8_t> rom_;
uint16_t rom_start_address_;
};
}