mirror of
https://github.com/TomHarte/CLK.git
synced 2024-12-12 08:30:05 +00:00
82 lines
2.0 KiB
C++
82 lines
2.0 KiB
C++
//
|
|
// Jasmin.cpp
|
|
// Clock Signal
|
|
//
|
|
// Created by Thomas Harte on 05/01/2020.
|
|
// Copyright © 2020 Thomas Harte. All rights reserved.
|
|
//
|
|
|
|
#include "Jasmin.hpp"
|
|
|
|
using namespace Oric;
|
|
|
|
// NB: there's some controversy here on WD1770 versus WD1772, but between those two I think
|
|
// the only difference is stepping rates, and it says 1770 on the schematic I'm looking at.
|
|
Jasmin::Jasmin() : DiskController(P1770, 8000000, Storage::Disk::Drive::ReadyType::ShugartRDY) {
|
|
set_is_double_density(true);
|
|
select_paged_item();
|
|
}
|
|
|
|
void Jasmin::write(int address, uint8_t value) {
|
|
switch(address) {
|
|
// Set side.
|
|
case 0x3f8: {
|
|
const int head = value & 1;
|
|
for_all_drives([head] (Storage::Disk::Drive &drive, size_t) {
|
|
drive.set_head(head);
|
|
});
|
|
} break;
|
|
|
|
case 0x3f9:
|
|
/* TODO: reset. */
|
|
break;
|
|
|
|
case 0x3fa: {
|
|
// If b0, enable overlay RAM.
|
|
enable_overlay_ram_ = value & 1;
|
|
select_paged_item();
|
|
} break;
|
|
|
|
case 0x3fb:
|
|
// If b0, disable BASIC ROM.
|
|
disable_basic_rom_ = value & 1;
|
|
select_paged_item();
|
|
break;
|
|
|
|
case 0x3fc: case 0x3fd: case 0x3fe: case 0x3ff: {
|
|
// Updated selected drives mask.
|
|
const uint8_t mask = uint8_t(1 << (address - 0x3fc));
|
|
selected_drives_ = (selected_drives_ & ~mask) | (mask * (value & 1));
|
|
|
|
// Select drive.
|
|
set_drive(selected_drives_);
|
|
|
|
// Update motor inputs: apply the motor only to selected drives.
|
|
// Which may or may not be correct.
|
|
for_all_drives([mask, this] (Storage::Disk::Drive &drive, size_t index) {
|
|
const uint8_t shift_mask = uint8_t(1 << index);
|
|
drive.set_motor_on( (mask & shift_mask) ? motor_on_ : false );
|
|
});
|
|
} break;
|
|
|
|
default:
|
|
return WD::WD1770::write(address, value);
|
|
}
|
|
}
|
|
|
|
void Jasmin::set_motor_on(bool on) {
|
|
motor_on_ = on;
|
|
get_drive().set_motor_on(motor_on_);
|
|
if(observer_) {
|
|
observer_->set_led_status("Jasmin", on);
|
|
}
|
|
}
|
|
|
|
void Jasmin::set_activity_observer(Activity::Observer *observer) {
|
|
observer_ = observer;
|
|
if(observer) {
|
|
observer->register_led("Jasmin");
|
|
observer_->set_led_status("Jasmin", motor_on_);
|
|
}
|
|
}
|