collapseos/emul/forth.c
Virgil Dupras 02e6979a46 emul: implement AT-XY
VI, here we come!
2020-05-23 20:15:28 -04:00

126 lines
2.7 KiB
C

#include <stdint.h>
#include <stdio.h>
#include <unistd.h>
#include <curses.h>
#include <termios.h>
#include "emul.h"
#define WCOLS 80
#define WLINES 32
// in sync with glue.asm
#define RAMSTART 0x900
#define STDIO_PORT 0x00
// This binary is also used for automated tests and those tests, when
// failing, send a non-zero value to RET_PORT to indicate failure
#define RET_PORT 0x01
// Port for block reads. Write 2 bytes, MSB first, on that port and then
// read 1024 bytes from the DATA port.
#define BLK_PORT 0x03
#define BLKDATA_PORT 0x04
#define SETX_PORT 0x05
#define SETY_PORT 0x06
static FILE *fp;
static int retcode = 0;
WINDOW *bw, *dw, *w;
void debug_panel()
{
char buf[30];
emul_debugstr(buf);
mvwaddnstr(dw, 0, 0, buf, 30);
wrefresh(dw);
}
static uint8_t iord_stdio()
{
int c;
if (fp != NULL) {
c = getc(fp);
} else {
debug_panel();
c = wgetch(w);
}
if (c == EOF) {
c = 4; // ASCII EOT
}
return (uint8_t)c;
}
static void iowr_stdio(uint8_t val)
{
if (fp != NULL) {
putchar(val);
} else {
if (val >= 0x20 || val == '\n') {
wechochar(w, val);
} else if (val == 0x08) {
int y, x; getyx(w, y, x);
wmove(w, y, x-1);
}
}
}
static void iowr_ret(uint8_t val)
{
retcode = val;
}
static void iowr_setx(uint8_t val)
{
int y, x; getyx(w, y, x);
wmove(w, y, val);
}
static void iowr_sety(uint8_t val)
{
int y, x; getyx(w, y, x);
wmove(w, val, x);
}
int main(int argc, char *argv[])
{
Machine *m = emul_init();
if (m == NULL) {
return 1;
}
m->ramstart = RAMSTART;
m->iord[STDIO_PORT] = iord_stdio;
m->iowr[STDIO_PORT] = iowr_stdio;
m->iowr[RET_PORT] = iowr_ret;
m->iowr[SETX_PORT] = iowr_setx;
m->iowr[SETY_PORT] = iowr_sety;
w = NULL;
if (argc == 2) {
fp = fopen(argv[1], "r");
if (fp == NULL) {
fprintf(stderr, "Can't open %s\n", argv[1]);
return 1;
}
while (emul_step());
fclose(fp);
} else if (argc == 1) {
fp = NULL;
initscr(); cbreak(); noecho(); nl(); clear();
// border window
bw = newwin(WLINES+2, WCOLS+2, 0, 0);
wborder(bw, 0, 0, 0, 0, 0, 0, 0, 0);
wrefresh(bw);
// debug panel
dw = newwin(1, 30, LINES-1, COLS-30);
w = newwin(WLINES, WCOLS, 1, 1);
scrollok(w, 1);
while (emul_steps(1000)) {
debug_panel();
}
nocbreak(); echo(); delwin(w); delwin(bw); delwin(dw); endwin();
printf("\nDone!\n");
emul_printdebug();
} else {
fprintf(stderr, "Usage: ./forth [filename]\n");
retcode = 1;
}
emul_deinit();
return retcode;
}