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82 lines
2.0 KiB
C++
82 lines
2.0 KiB
C++
//
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// Jasmin.cpp
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// Clock Signal
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//
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// Created by Thomas Harte on 05/01/2020.
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// Copyright © 2020 Thomas Harte. All rights reserved.
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//
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#include "Jasmin.hpp"
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using namespace Oric;
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// NB: there's some controversy here on WD1770 versus WD1772, but between those two I think
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// the only difference is stepping rates, and it says 1770 on the schematic I'm looking at.
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Jasmin::Jasmin() : DiskController(P1770, 8000000, Storage::Disk::Drive::ReadyType::ShugartRDY) {
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set_is_double_density(true);
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select_paged_item();
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}
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void Jasmin::write(int address, uint8_t value) {
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switch(address) {
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// Set side.
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case 0x3f8: {
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const int head = value & 1;
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for_all_drives([head] (Storage::Disk::Drive &drive, size_t) {
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drive.set_head(head);
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});
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} break;
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case 0x3f9:
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/* TODO: reset. */
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break;
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case 0x3fa: {
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// If b0, enable overlay RAM.
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enable_overlay_ram_ = value & 1;
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select_paged_item();
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} break;
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case 0x3fb:
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// If b0, disable BASIC ROM.
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disable_basic_rom_ = value & 1;
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select_paged_item();
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break;
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case 0x3fc: case 0x3fd: case 0x3fe: case 0x3ff: {
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// Updated selected drives mask.
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const uint8_t mask = uint8_t(1 << (address - 0x3fc));
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selected_drives_ = (selected_drives_ & ~mask) | (mask * (value & 1));
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// Select drive.
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set_drive(selected_drives_);
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// Update motor inputs: apply the motor only to selected drives.
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// Which may or may not be correct.
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for_all_drives([mask, this] (Storage::Disk::Drive &drive, size_t index) {
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const uint8_t shift_mask = uint8_t(1 << index);
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drive.set_motor_on( (mask & shift_mask) ? motor_on_ : false );
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});
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} break;
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default:
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return WD::WD1770::write(address, value);
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}
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}
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void Jasmin::set_motor_on(bool on) {
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motor_on_ = on;
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get_drive().set_motor_on(motor_on_);
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if(observer_) {
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observer_->set_led_status("Jasmin", on);
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}
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}
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void Jasmin::set_activity_observer(Activity::Observer *observer) {
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observer_ = observer;
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if(observer) {
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observer->register_led("Jasmin");
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observer_->set_led_status("Jasmin", motor_on_);
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}
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}
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