mirror of
https://github.com/hsoft/collapseos.git
synced 2024-11-14 15:18:06 +11:00
318 lines
8.0 KiB
C
318 lines
8.0 KiB
C
/* TI-84+
|
|
*
|
|
* A plain TI-84 with its built-in keyboard as an input and its LCD screen
|
|
* as an output.
|
|
*
|
|
* Uses XCB to render the screen and record keystrokes.
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <stdbool.h>
|
|
|
|
#include <xcb/xcb.h>
|
|
|
|
#include "../../emul.h"
|
|
#include "t6a04.h"
|
|
#include "kbd.h"
|
|
|
|
#define RAMSTART 0x8000
|
|
#define KBD_PORT 0x01
|
|
#define INTERRUPT_PORT 0x03
|
|
#define LCD_CMD_PORT 0x10
|
|
#define LCD_DATA_PORT 0x11
|
|
#define MAX_ROMSIZE 0x4000
|
|
|
|
static xcb_connection_t *conn;
|
|
static xcb_screen_t *screen;
|
|
|
|
/* graphics contexts */
|
|
static xcb_gcontext_t fg;
|
|
/* win */
|
|
static xcb_drawable_t win;
|
|
|
|
// pixels to draw. We draw them in one shot.
|
|
static xcb_rectangle_t rectangles[96*64];
|
|
|
|
static Machine *m;
|
|
static T6A04 lcd;
|
|
static bool lcd_changed;
|
|
static KBD kbd;
|
|
static bool on_was_pressed;
|
|
|
|
static uint8_t iord_lcd_cmd()
|
|
{
|
|
return t6a04_cmd_rd(&lcd);
|
|
}
|
|
|
|
static uint8_t iord_lcd_data()
|
|
{
|
|
return t6a04_data_rd(&lcd);
|
|
}
|
|
|
|
static uint8_t iord_kbd()
|
|
{
|
|
return kbd_rd(&kbd);
|
|
}
|
|
|
|
static uint8_t iord_interrupt()
|
|
{
|
|
return on_was_pressed ? 1 : 0;
|
|
}
|
|
|
|
static void iowr_lcd_cmd(uint8_t val)
|
|
{
|
|
t6a04_cmd_wr(&lcd, val);
|
|
}
|
|
|
|
static void iowr_lcd_data(uint8_t val)
|
|
{
|
|
lcd_changed = true;
|
|
t6a04_data_wr(&lcd, val);
|
|
}
|
|
|
|
static void iowr_kbd(uint8_t val)
|
|
{
|
|
kbd_wr(&kbd, val);
|
|
}
|
|
|
|
static void iowr_interrupt(uint8_t val)
|
|
{
|
|
if ((val & 1) == 0) {
|
|
on_was_pressed = false;
|
|
}
|
|
}
|
|
|
|
// TIL: XCB doesn't have a builtin way to translate a keycode to an ASCII char.
|
|
// Using Xlib looks complicated. This will probably not work in many cases (non
|
|
// query keyboards and all...), but for now, let's go with this.
|
|
static uint8_t keycode_to_tikbd(xcb_keycode_t kc)
|
|
{
|
|
switch (kc) {
|
|
case 0x0a: return 0x41; // 1
|
|
case 0x0b: return 0x31; // 2
|
|
case 0x0c: return 0x21; // 3
|
|
case 0x0d: return 0x42; // 4
|
|
case 0x0e: return 0x32; // 5
|
|
case 0x0f: return 0x22; // 6
|
|
case 0x10: return 0x43; // 7
|
|
case 0x11: return 0x33; // 8
|
|
case 0x12: return 0x23; // 9
|
|
case 0x13: return 0x40; // 0
|
|
case 0x14: return 0x12; // -
|
|
case 0x15: return 0x11; // +
|
|
case 0x16: return 0x67; // DEL
|
|
case 0x18: return 0x23; // Q
|
|
case 0x19: return 0x12; // W
|
|
case 0x1a: return 0x45; // E
|
|
case 0x1b: return 0x13; // R
|
|
case 0x1c: return 0x42; // T
|
|
case 0x1d: return 0x41; // Y
|
|
case 0x1e: return 0x32; // U
|
|
case 0x1f: return 0x54; // I
|
|
case 0x20: return 0x43; // O
|
|
case 0x21: return 0x33; // P
|
|
case 0x22: return 0x34; // (
|
|
case 0x23: return 0x24; // )
|
|
case 0x24: return 0x10; // Return
|
|
case 0x25: return KBD_ALPHA; // LCTRL
|
|
case 0x26: return 0x56; // A
|
|
case 0x27: return 0x52; // S
|
|
case 0x28: return 0x55; // D
|
|
case 0x29: return 0x35; // F
|
|
case 0x2a: return 0x25; // G
|
|
case 0x2b: return 0x15; // H
|
|
case 0x2c: return 0x44; // J
|
|
case 0x2d: return 0x34; // K
|
|
case 0x2e: return 0x24; // L
|
|
case 0x2f: return 0x30; // :
|
|
case 0x30: return 0x11; // "
|
|
case 0x32: return KBD_2ND; // Lshift
|
|
case 0x34: return 0x31; // Z
|
|
case 0x35: return 0x51; // X
|
|
case 0x36: return 0x36; // C
|
|
case 0x37: return 0x22; // V
|
|
case 0x38: return 0x46; // B
|
|
case 0x39: return 0x53; // N
|
|
case 0x3a: return 0x14; // M
|
|
case 0x3b: return 0x44; // ,
|
|
case 0x3c: return 0x30; // .
|
|
case 0x3d: return 0x20; // ?
|
|
case 0x41: return 0x40; // Space
|
|
default: return 0;
|
|
}
|
|
}
|
|
|
|
void create_window()
|
|
{
|
|
uint32_t mask;
|
|
uint32_t values[2];
|
|
|
|
/* Create the window */
|
|
win = xcb_generate_id(conn);
|
|
mask = XCB_CW_BACK_PIXEL | XCB_CW_EVENT_MASK;
|
|
values[0] = screen->white_pixel;
|
|
values[1] = XCB_EVENT_MASK_EXPOSURE | XCB_EVENT_MASK_KEY_PRESS |
|
|
XCB_EVENT_MASK_KEY_RELEASE;
|
|
xcb_create_window(
|
|
conn,
|
|
screen->root_depth,
|
|
win,
|
|
screen->root,
|
|
0, 0,
|
|
500, 500,
|
|
10,
|
|
XCB_WINDOW_CLASS_INPUT_OUTPUT,
|
|
screen->root_visual,
|
|
mask, values);
|
|
|
|
fg = xcb_generate_id(conn);
|
|
mask = XCB_GC_FOREGROUND | XCB_GC_GRAPHICS_EXPOSURES;
|
|
values[0] = screen->black_pixel;
|
|
values[1] = 0;
|
|
xcb_create_gc(conn, fg, screen->root, mask, values);
|
|
|
|
/* Map the window on the screen */
|
|
xcb_map_window(conn, win);
|
|
}
|
|
|
|
bool get_pixel(int x, int y)
|
|
{
|
|
return t6a04_pixel(&lcd, x, y);
|
|
}
|
|
|
|
void draw_pixels()
|
|
{
|
|
xcb_get_geometry_reply_t *geom;
|
|
|
|
geom = xcb_get_geometry_reply(conn, xcb_get_geometry(conn, win), NULL);
|
|
|
|
xcb_clear_area(
|
|
conn, 0, win, 0, 0, geom->width, geom->height);
|
|
// Figure out inner size to maximize a 96x64 screen (1.5 aspect ratio)
|
|
int psize = geom->height / 64;
|
|
if (geom->width / 96 < psize) {
|
|
// width is the constraint
|
|
psize = geom->width / 96;
|
|
}
|
|
int innerw = psize * 96;
|
|
int innerh = psize * 64;
|
|
int innerx = (geom->width - innerw) / 2;
|
|
int innery = (geom->height - innerh) / 2;
|
|
free(geom);
|
|
int drawcnt = 0;
|
|
for (int i=0; i<96; i++) {
|
|
for (int j=0; j<64; j++) {
|
|
if (get_pixel(i, j)) {
|
|
int x = innerx + (i*psize);
|
|
int y = innery + (j*psize);
|
|
rectangles[drawcnt].x = x;
|
|
rectangles[drawcnt].y = y;
|
|
rectangles[drawcnt].height = psize;
|
|
rectangles[drawcnt].width = psize;
|
|
drawcnt++;
|
|
}
|
|
}
|
|
}
|
|
if (drawcnt) {
|
|
xcb_poly_fill_rectangle(
|
|
conn, win, fg, drawcnt, rectangles);
|
|
}
|
|
lcd_changed = false;
|
|
xcb_flush(conn);
|
|
}
|
|
|
|
void event_loop()
|
|
{
|
|
while (1) {
|
|
emul_steps(100);
|
|
if (lcd_changed) {
|
|
draw_pixels();
|
|
}
|
|
// A low tech way of checking when the window was closed. The proper way
|
|
// involving WM_DELETE is too complicated.
|
|
xcb_get_geometry_reply_t *geom;
|
|
geom = xcb_get_geometry_reply(conn, xcb_get_geometry(conn, win), NULL);
|
|
if (geom == NULL) {
|
|
return; // window has been closed.
|
|
} else {
|
|
free(geom);
|
|
}
|
|
xcb_generic_event_t *e = xcb_poll_for_event(conn);
|
|
if (!e) {
|
|
continue;
|
|
}
|
|
switch (e->response_type & ~0x80) {
|
|
/* ESC to exit */
|
|
case XCB_KEY_RELEASE:
|
|
case XCB_KEY_PRESS: {
|
|
xcb_key_press_event_t *ev = (xcb_key_press_event_t *)e;
|
|
if (ev->detail == 0x09) return;
|
|
if (ev->detail == 0x31 && e->response_type == XCB_KEY_PRESS) {
|
|
// tilde, mapped to ON
|
|
on_was_pressed = true;
|
|
Z80INT(&m->cpu, 0);
|
|
Z80Execute(&m->cpu); // unhalts the CPU
|
|
}
|
|
uint8_t key = keycode_to_tikbd(ev->detail);
|
|
if (key) {
|
|
kbd_setkey(&kbd, key, e->response_type == XCB_KEY_PRESS);
|
|
}
|
|
break;
|
|
}
|
|
case XCB_EXPOSE: {
|
|
draw_pixels();
|
|
break;
|
|
}
|
|
default: {
|
|
break;
|
|
}
|
|
}
|
|
free(e);
|
|
}
|
|
}
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
if (argc != 2) {
|
|
fprintf(stderr, "Usage: ./ti84 /path/to/rom\n");
|
|
return 1;
|
|
}
|
|
FILE *fp = fopen(argv[1], "r");
|
|
if (fp == NULL) {
|
|
fprintf(stderr, "Can't open %s\n", argv[1]);
|
|
return 1;
|
|
}
|
|
m = emul_init();
|
|
m->ramstart = RAMSTART;
|
|
int i = 0;
|
|
int c;
|
|
while ((c = fgetc(fp)) != EOF && i < MAX_ROMSIZE) {
|
|
m->mem[i++] = c & 0xff;
|
|
}
|
|
pclose(fp);
|
|
if (i == MAX_ROMSIZE) {
|
|
fprintf(stderr, "ROM image too large.\n");
|
|
return 1;
|
|
}
|
|
t6a04_init(&lcd);
|
|
kbd_init(&kbd);
|
|
lcd_changed = false;
|
|
on_was_pressed = false;
|
|
m->iord[KBD_PORT] = iord_kbd;
|
|
m->iord[INTERRUPT_PORT] = iord_interrupt;
|
|
m->iord[LCD_CMD_PORT] = iord_lcd_cmd;
|
|
m->iord[LCD_DATA_PORT] = iord_lcd_data;
|
|
m->iowr[KBD_PORT] = iowr_kbd;
|
|
m->iowr[INTERRUPT_PORT] = iowr_interrupt;
|
|
m->iowr[LCD_CMD_PORT] = iowr_lcd_cmd;
|
|
m->iowr[LCD_DATA_PORT] = iowr_lcd_data;
|
|
conn = xcb_connect(NULL, NULL);
|
|
screen = xcb_setup_roots_iterator(xcb_get_setup(conn)).data;
|
|
create_window();
|
|
draw_pixels();
|
|
event_loop();
|
|
emul_printdebug();
|
|
return 0;
|
|
}
|