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62 lines
1.7 KiB
C++
62 lines
1.7 KiB
C++
//
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// Plus3.cpp
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// Clock Signal
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//
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// Created by Thomas Harte on 25/09/2016.
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// Copyright 2016 Thomas Harte. All rights reserved.
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//
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#include "Plus3.hpp"
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using namespace Electron;
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Plus3::Plus3() : WD1770(P1770) {
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drives_.emplace_back(new Storage::Disk::Drive(8000000, 300, 2));
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drives_.emplace_back(new Storage::Disk::Drive(8000000, 300, 2));
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set_control_register(last_control_, 0xff);
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}
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void Plus3::set_disk(std::shared_ptr<Storage::Disk::Disk> disk, size_t drive) {
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drives_[drive]->set_disk(disk);
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}
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void Plus3::set_control_register(uint8_t control) {
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// bit 0 => enable or disable drive 1
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// bit 1 => enable or disable drive 2
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// bit 2 => side select
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// bit 3 => single density select
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uint8_t changes = control ^ last_control_;
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last_control_ = control;
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set_control_register(control, changes);
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}
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void Plus3::set_control_register(uint8_t control, uint8_t changes) {
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if(changes&3) {
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switch(control&3) {
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case 0: selected_drive_ = -1; set_drive(nullptr); break;
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default: selected_drive_ = 0; set_drive(drives_[0]); break;
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case 2: selected_drive_ = 1; set_drive(drives_[1]); break;
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}
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}
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if(changes & 0x04) {
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drives_[0]->set_head((control & 0x04) ? 1 : 0);
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drives_[1]->set_head((control & 0x04) ? 1 : 0);
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}
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if(changes & 0x08) set_is_double_density(!(control & 0x08));
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}
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void Plus3::set_motor_on(bool on) {
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// TODO: this status should transfer if the selected drive changes. But the same goes for
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// writing state, so plenty of work to do in general here.
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get_drive().set_motor_on(on);
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}
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void Plus3::set_activity_observer(Activity::Observer *observer) {
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size_t index = 0;
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for(const auto &drive: drives_) {
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drive->set_activity_observer(observer, "Drive " + std::to_string(index+1), true);
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++index;
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}
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}
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