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81 lines
2.2 KiB
C++
81 lines
2.2 KiB
C++
//
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// ADB.cpp
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// Clock Signal
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//
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// Created by Thomas Harte on 31/10/2020.
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// Copyright © 2020 Thomas Harte. All rights reserved.
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//
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#include "ADB.hpp"
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#include <cstdio>
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using namespace Apple::IIgs::ADB;
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uint8_t GLU::get_keyboard_data() {
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// The classic Apple II serial keyboard register:
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// b7: key strobe.
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// b6–b0: ASCII code.
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return 0x00;
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}
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void GLU::clear_key_strobe() {
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// Clears the key strobe of the classic Apple II serial keyboard register.
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}
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uint8_t GLU::get_any_key_down() {
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// The Apple IIe check-for-any-key-down bit.
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return 0x00;
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}
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uint8_t GLU::get_mouse_data() {
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// Alternates between returning x and y values.
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//
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// b7: 1 = button is up; 0 = button is down.
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// b6: delta sign bit; 1 = negative.
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// b5–b0: mouse delta.
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return 0x80;
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}
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uint8_t GLU::get_modifier_status() {
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// b7: 1 = command key pressed; 0 = not.
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// b6: option key.
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// b5: 1 = modifier key latch has been updated, no key has been pressed; 0 = not.
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// b4: any numeric keypad key.
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// b3: a key is down.
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// b2: caps lock is pressed.
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// b1: control key.
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// b0: shift key.
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return 0x00;
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}
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uint8_t GLU::get_data() {
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// b0–2: number of data bytes to be returned.
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// b3: 1 = a valid service request is pending; 0 = no request pending.
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// b4: 1 = control, command and delete keys have been pressed simultaneously; 0 = they haven't.
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// b5: 1 = control, command and reset have all been pressed together; 0 = they haven't.
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// b6: 1 = ADB controller encountered an error and reset itself; 0 = no error.
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// b7: 1 = ADB has received a response from the addressed ADB device; 0 = no respone.
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return 0x00;
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}
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uint8_t GLU::get_status() {
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// b7: 1 = mouse data register is full; 0 = empty.
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// b6: 1 = mouse interrupt is enabled.
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// b5: 1 = command/data has valid data.
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// b4: 1 = command/data interrupt is enabled.
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// b3: 1 = keyboard data is full.
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// b2: 1 = keyboard data interrupt is enabled.
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// b1: 1 = mouse x-data is available; 0 = y.
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// b0: 1 = command register is full (set when command is written); 0 = empty (cleared when data is read).
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return 0x00;
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}
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void GLU::set_command(uint8_t command) {
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printf("TODO: set ADB command: %02x\n", command);
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}
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void GLU::set_status(uint8_t status) {
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printf("TODO: set ADB status %02x\n", status);
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}
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