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CLK/Machines/Apple/AppleII/DiskIICard.cpp
2024-02-15 10:29:30 -05:00

83 lines
2.5 KiB
C++

//
// DiskII.cpp
// Clock Signal
//
// Created by Thomas Harte on 23/04/2018.
// Copyright 2018 Thomas Harte. All rights reserved.
//
#include "DiskIICard.hpp"
using namespace Apple::II;
ROM::Request DiskIICard::rom_request(bool is_16_sector) {
if(is_16_sector) {
return ROM::Request(ROM::Name::DiskIIBoot16Sector) && ROM::Request(ROM::Name::DiskIIStateMachine16Sector);
} else {
/* TODO: once the DiskII knows how to decode common images of the 13-sector state machine, use that instead of the 16-sector. */
return ROM::Request(ROM::Name::DiskIIBoot13Sector) && ROM::Request(ROM::Name::DiskIIStateMachine16Sector);
}
}
DiskIICard::DiskIICard(ROM::Map &map, bool is_16_sector) : diskii_(2045454) {
std::vector<std::unique_ptr<std::vector<uint8_t>>> roms;
ROM::Map::iterator state_machine, boot;
if(is_16_sector) {
state_machine = map.find(ROM::Name::DiskIIStateMachine16Sector);
boot = map.find(ROM::Name::DiskIIBoot16Sector);
} else {
// TODO: see above re: 13-sector state machine.
state_machine = map.find(ROM::Name::DiskIIStateMachine16Sector);
boot = map.find(ROM::Name::DiskIIBoot13Sector);
}
if(state_machine == map.end() || boot == map.end()) {
throw ROMMachine::Error::MissingROMs;
}
boot_ = std::move(boot->second);
diskii_.set_state_machine(state_machine->second);
set_select_constraints(None);
diskii_.set_clocking_hint_observer(this);
}
void DiskIICard::perform_bus_operation(Select select, bool is_read, uint16_t address, uint8_t *value) {
diskii_.set_data_input(*value);
switch(select) {
default: break;
case Device: {
const int disk_value = diskii_.read_address(address);
if(is_read) {
if(disk_value != diskii_.DidNotLoad)
*value = uint8_t(disk_value);
}
} break;
case IO:
if(is_read) *value = boot_[address & 0xff];
break;
}
}
void DiskIICard::run_for(Cycles cycles, int) {
if(diskii_clocking_preference_ == ClockingHint::Preference::None) return;
diskii_.run_for(Cycles(cycles.as_integral() * 2));
}
void DiskIICard::set_disk(const std::shared_ptr<Storage::Disk::Disk> &disk, int drive) {
diskii_.set_disk(disk, drive);
}
void DiskIICard::set_activity_observer(Activity::Observer *observer) {
diskii_.set_activity_observer(observer);
}
void DiskIICard::set_component_prefers_clocking(ClockingHint::Source *, ClockingHint::Preference preference) {
diskii_clocking_preference_ = preference;
set_select_constraints((preference != ClockingHint::Preference::RealTime) ? (Device | IO) : None);
}
Storage::Disk::Drive &DiskIICard::get_drive(int drive) {
return diskii_.get_drive(drive);
}