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https://github.com/RyuKojiro/apple1.git
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a83bd0fa8b
git-svn-id: svn+ssh://svn.phoenixbox.net/svn/apple1/trunk@15 64f78de7-aa59-e511-a0e8-0002a5492df0
104 lines
2.4 KiB
C
104 lines
2.4 KiB
C
//
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// pia.c
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// apple1
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//
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// Created by Daniel Loffgren on 9/12/15.
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// Copyright (c) 2015 Daniel Loffgren. All rights reserved.
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//
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#include "pia.h"
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#include <stdio.h>
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#include <as6502/color.h>
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#include <stdlib.h>
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#define FIXME_I_SHOULDNT_BE_NULL NULL
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#define KEYBOARD_READY 0xFF // This just needs to meet the requirements of being a negative number in the eyes of the 6502
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#define KEYBOARD_NOTREADY 0x00
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char asciiCharFromA1Char(uint8_t c) {
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switch (c) {
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case 0xDC: return '\\';
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case 0x8D: return '\n';
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}
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return (char)c & ~0x20;
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}
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uint8_t a1CharFromAsciiChar(char c) {
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switch (c) {
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case '\\': return 0xDC;
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case '\r': return 0x8D;
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}
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return (char)c;
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}
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void videoWriteCharCallback(struct _v6502_memory *memory, uint16_t offset, uint8_t value, void *context) {
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if (value) {
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char c = asciiCharFromA1Char(value);
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if (c == '\n') {
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fprintf(stdout, "\n\r");
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}
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else {
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fprintf(stdout, ANSI_COLOR_BRIGHT_GREEN "%c" ANSI_COLOR_RESET, c);
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}
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//memory->bytes[offset] = value;
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fflush(stdout);
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}
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}
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void videoWriteNewlineCallback(struct _v6502_memory *memory, uint16_t offset, uint8_t value, void *context) {
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fprintf(stdout, "\r\n");
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fflush(stdout);
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}
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uint8_t keyboardReadReadyCallback(struct _v6502_memory *memory, uint16_t offset, int trap, a1pia *context) {
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if (context->buf) {
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return KEYBOARD_READY;
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}
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int c = getch();
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if (c != ERR) {
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context->buf = c;
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return KEYBOARD_READY;
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}
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return KEYBOARD_NOTREADY;
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}
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uint8_t keyboardReadCharacterCallback(struct _v6502_memory *memory, uint16_t offset, int trap, a1pia *context) {
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if (context->buf) {
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uint8_t a = a1CharFromAsciiChar(context->buf);
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context->buf = '\0';
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return a;
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}
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return 0;
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}
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static void _doCoolVideoStart(a1pia *pia) {
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}
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a1pia *pia_create(v6502_memory *mem) {
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a1pia *pia = malloc(sizeof(a1pia));
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pia->memory = mem;
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pia->screen = initscr();
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//nodelay(stdscr, true);
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crmode();
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noecho();
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nonl();
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v6502_map(mem, A1PIA_KEYBOARD_INPUT, 1, (v6502_readFunction *)keyboardReadCharacterCallback, NULL, pia);
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v6502_map(mem, A1PIA_KEYBOARD_CRLF_REG, 1, (v6502_readFunction *)keyboardReadReadyCallback, NULL, pia);
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v6502_map(mem, A1PIA_VIDEO_OUTPUT, 1, FIXME_I_SHOULDNT_BE_NULL, videoWriteCharCallback, pia);
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v6502_map(mem, A1PIA_VIDEO_CRLF_REG, 1, FIXME_I_SHOULDNT_BE_NULL, videoWriteNewlineCallback, pia);
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_doCoolVideoStart(pia);
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return pia;
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}
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void pia_destroy(a1pia *pia) {
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endwin();
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free(pia);
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}
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