467 lines
12 KiB
Plaintext
467 lines
12 KiB
Plaintext
//
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// Apple3.mm
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// 2Term
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//
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// Created by Kelvin Sherlock on 12/24/2018.
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// Copyright 2010 __MyCompanyName__. All rights reserved.
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//
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/*
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* See Apple III Standard Device Drivers Manual (ch 3, The Console Driver)
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* Also implemented via AppleWorks (which started life as III EZ Pieces)
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*
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* Apple III console can be 24 x 40 (BW), 24 x 40 (16 color), or 24 x 80 (BW).
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*
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*/
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#import "Apple3.h"
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#include <sys/ttydefaults.h>
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#include "OutputChannel.h"
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#include "Screen.h"
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#include "algorithm.h"
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#import "CharacterGenerator.h"
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enum {
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kAdvance = 1 << 0,
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kLineFeed = 1 << 1,
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kWrap = 1 << 2,
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kScroll = 1 << 3,
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};
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%%{
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machine console;
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alphtype unsigned int;
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action nop {}
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action advance {
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// advance cursor
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if (_context.cursor_control & kAdvance) {
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switch (_context.cursor_control & (kWrap | kScroll)) {
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default:
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if (cursor.x < window.maxX() - 1) ++cursor.x;
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break;
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case kWrap:
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if (cursor.x < window.maxX() - 1) ++cursor.x;
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else {
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cursor.x = window.minX();
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if (cursor.y < window.maxY() - 1) ++cursor.y;
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}
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break;
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case kWrap | kScroll:
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if (cursor.x < window.maxX() - 1) ++cursor.x;
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else {
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cursor.x = window.minX();
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if (cursor.y < window.maxY() - 1) ++cursor.y;
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else screen->scrollUp(window);
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}
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break;
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}
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}
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}
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action setx {
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/* horizontal position */
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int x = (unsigned)fc;
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x += window.minX();
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cursor.x = std::min(x, window.maxX() - 1);
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}
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action sety {
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/* vertical position */
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int y = (unsigned)fc;
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y += window.minY();
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cursor.y = std::min(y, window.maxY() - 1);
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}
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# arg1 = any ${ _scratch[0] = fc; };
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# arg2 = any ${ _scratch[1] = fc; };
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main := (
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0x00 $nop
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| 0x01 ${
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/* save viewport and reset */
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_saved_context = _context;
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window = iRect(0, 0, 80, 24);
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/* currently ignores mode */
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}
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| 0x02 ${
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/* set viewport top */
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iPoint tl = cursor;
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iPoint br = window.bottomRight();
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_context.window = iRect(tl, br);
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}
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| 0x03 ${
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/* set viewport bottom */
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iPoint tl = _context.window.topLeft();
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iPoint br = _context.cursor.offset(1,1);
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_context.window = iRect(tl, br);
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}
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| 0x04 ${
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/* restore viewport */
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_context = _saved_context;
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}
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| 0x05 ${
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/* E - $05 - Turns cursor on (enables cursor display) */
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screen->setCursorType(Screen::CursorTypeUnderscore);
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}
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| 0x06 ${
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/* F - $06 - Turns cursor off (disables cursor display) */
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screen->setCursorType(Screen::CursorTypeNone);
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}
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| 0x07 ${
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/* Beep */
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NSBeep();
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}
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| 0x08 ${
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/* Moves cursor left */
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if (cursor.x > window.minX()) --cursor.x;
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else if (_context.cursor_control & kWrap) {
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cursor.x = window.maxX() - 1;
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if (cursor.y > window.minY()) --cursor.y;
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else if (_context.cursor_control & kScroll) {
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screen->scrollDown(window);
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}
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}
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}
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| 0x09 ${
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/* move cursor right */
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if (cursor.x < window.maxX()-1) ++cursor.x;
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else if (_context.cursor_control & kWrap) {
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cursor.x = window.minX();
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if (cursor.y < window.maxY()-1) ++cursor.y;
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else if (_context.cursor_control & kScroll) {
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screen->scrollUp(window);
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}
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}
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}
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| 0x0a ${
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/* move cursor down */
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if (cursor.y < window.maxY() - 1) ++cursor.y;
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else if (_context.cursor_control & kScroll) {
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screen->scrollUp(window);
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}
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}
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| 0x0b ${
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/* move cursor up */
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if (cursor.y > window.minY()) --cursor.y;
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else if (_context.cursor_control & kScroll) {
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screen->scrollDown(window);
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}
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}
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| 0x0c ${
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/* home */
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cursor = iPoint(window.topLeft());
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}
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| 0x0d ${
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/* carriage return */
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/* also LF depending on cursor motion */
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cursor.x = window.minX();
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if (_context.cursor_control & kLineFeed) {
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if (cursor.y < window.maxY() - 1) ++cursor.y;
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else if (_context.cursor_control & kScroll) {
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screen->scrollUp(window);
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}
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}
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}
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| 0x0e ${
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/* turn screen off ... */
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}
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| 0x0f ${
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/* turn screen on ... */
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}
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| 0x10 any ${
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/* set text mode (40 vs 80, color vs bw) */
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_context.mode = fc & 0x03;
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}
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| 0x11 ${
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/* normal text */
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_context.clearFlagBit(Screen::FlagInverse);
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}
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| 0x12 ${
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/* invert text */
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_context.setFlagBit(Screen::FlagInverse);
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}
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| 0x13 any ${
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/* set foreground text color */
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_context.fg_color = fc & 0x0f;
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}
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| 0x14 any ${
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/* set background text color */
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_context.bg_color = fc & 0x0f;
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}
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| 0x15 any ${
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/* set cursor motion control */
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_context.cursor_control = fc & 0x0f;
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}
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# sync
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| 0x16 $nop
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| 0x17 any ${
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/* horizontal shift */
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int count = (int8_t)fc;
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/* if > 0, shift right */
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if (count > 0) screen->scrollRight(window, count);
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/* if < 0, shift left */
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if (count < 0) screen->scrollLeft(window, -count);
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}
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# horizontal position
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| 0x18 any $setx
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# vertical position
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| 0x19 any $sety
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# horizontal + vertical position
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| 0x1a any $setx any $sety
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# esc - reserved
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| 0x1b $nop
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| 0x1c ${
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/* HOME + clear viewport */
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cursor = window.topLeft();
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screen->eraseRect(window);
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}
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| 0x1d ${
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/* clear to end of viewport */
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iRect r(cursor, window.bottomRight());
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r.size.height = 1;
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screen->eraseRect(r);
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r = iRect(window.minX(), cursor.y + 1, window.width(), window.maxY() - cursor.y - 1);
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screen->eraseRect(r);
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}
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| 0x1e ${
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/* move to left edge of viewport, clear line */
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cursor.y = window.minY();
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iRect r(cursor, window.bottomRight());
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r.size.height = 1;
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screen->eraseRect(r);
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}
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| 0x1f ${
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/* clear to end of line */
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iRect r(cursor, window.bottomRight());
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r.size.height = 1;
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screen->eraseRect(r);
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}
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| 0x20 .. 0x7f ${
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screen->putc(fc, _context);
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} $advance
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| 0x80 .. 0x9f ${
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/* display control char? */
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}
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| 0xa0 .. 0xff ${
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screen->putc(fc & 0x7f, _context);
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} $advance
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)* $err{ fgoto main; };
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write data;
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}%%
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@implementation Apple3
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+(void)load {
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[EmulatorManager registerClass: self];
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}
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- (NSString *)name {
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return @"Apple III";
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}
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+ (NSString *)name {
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return @"Apple III";
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}
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- (const char *)termName {
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return "appleIII";
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}
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-(void)reset: (BOOL)hard
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{
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%%write init;
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_context.flags = 0;
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_cursorType = Screen::CursorTypeUnderscore;
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_context.fg_color = 15; /* white */
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_context.bg_color = 0; /* black */
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_context.cursor_control = kScroll | kWrap | kAdvance;
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if (hard) {
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_context.window = iRect(0, 0, 80, 24);
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_context.cursor = iPoint(0,0);
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_context.mode = 2;
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_saved_context = iii_context();
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}
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}
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-(BOOL)resizable
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{
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return NO;
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}
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-(struct winsize)defaultSize
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{
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struct winsize ws = { 24, 80, 0, 0 };
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return ws;
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}
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-(void)initTerm: (struct termios *)term
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{
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// Control-U is used by the up-arrow key.
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term->c_cc[VKILL] = CTRL('X');
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// tab is right arrow, so expand to spaces.
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term->c_oflag |= OXTABS;
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}
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-(id)init
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{
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if ((self = [super init]))
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{
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[self reset: YES];
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}
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return self;
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}
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-(void)processData:(uint8_t *)data length: (size_t)length screen:(Screen *)screen output:(OutputChannel *)output
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{
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const uint8_t *eof = nullptr;
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const uint8_t *p = data;
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const uint8_t *pe = data + length;
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auto &cursor = _context.cursor;
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auto &window = _context.window;
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auto &cursor_control = _context.cursor_control;
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%%write exec;
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screen->setCursor(cursor);
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}
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-(void)keyDown:(NSEvent *)event screen:(Screen *)screen output:(OutputChannel *)output
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{
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NSEventModifierFlags flags = [event modifierFlags];
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NSString *chars = [event charactersIgnoringModifiers];
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NSUInteger length = [chars length];
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for (unsigned i = 0; i < length; ++i)
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{
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unichar uc = [chars characterAtIndex: i];
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switch (uc)
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{
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case NSEnterCharacter:
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output->write(CTRL('M'));
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break;
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/*
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case NSDeleteCharacter:
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output->write(0x7f);
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break;
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*/
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// the Apple II keyboard had a delete where the backspace key was.
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// it functions as a backspace key.
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case NSBackspaceCharacter:
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output->write(0x7f);
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break;
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case NSLeftArrowFunctionKey:
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output->write(CTRL('H'));
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break;
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case NSRightArrowFunctionKey:
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output->write(CTRL('U'));
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break;
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case NSUpArrowFunctionKey:
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output->write(CTRL('K'));
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break;
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case NSDownArrowFunctionKey:
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output->write(CTRL('J'));
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break;
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default:
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if (uc <= 0x7f)
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{
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char c = uc;
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//NSLog(@"%@", event);
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if (flags & NSAlphaShiftKeyMask)
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{
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c = flags & NSShiftKeyMask ? tolower(c) : toupper(c);
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}
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if (flags & NSControlKeyMask)
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c = CTRL(c);
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output->write(c);
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}
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break;
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}
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}
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}
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@end
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