io.c


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#include "sux.h"

uint8_t iscol;
uint8_t idx = 3;
uint8_t bcd[4];

void io(uint64_t address, uint8_t rw) {
	int x, y;
	uint16_t scr_col = 0;
	/*step |= (!rw) ? (cpu->pc[thread] == CTRL_ADDR) : step;*/
	switch (address) {
		case STEP_ADDR: step = (!rw) ? addr[STEP_ADDR] : step; break;
		case CTRL_ADDR:
			if (!rw) {
				break;
			}
			kbd_rdy = 1;
			pthread_mutex_lock(&main_mutex);
			pthread_cond_signal(&main_cond);
			pthread_mutex_unlock(&main_mutex);
			#if !keypoll
			pthread_mutex_lock(&mutex);
			pthread_cond_wait(&cond, &mutex);
			pthread_mutex_unlock(&mutex);
			#endif
			kbd_rdy = 0;
			break;
		case TX_ADDR:
			if (rw) {
				break;
			}
			getyx(scr, y, x);
			#if debug
			if (!subdbg) {
				scr_col = (addr[TX_ADDR] != 0x0C && addr[TX_ADDR] != '\n' && scr_col < 160) ? (addr[1] << 1)-2 : 0;
				wmove(scr, 28, scr_col);
			}
			#endif
			if (esc) {
				#if debug
				if (!subdbg && addr[RX_ADDR] == '\n') {
					wclrtoeol(scr);
				}
				#endif
				switch (addr[TX_ADDR]) {
					case 'A':
						if (y > 0)
							y--;
						#if !debug
						wmove(scr, y, x);
						#endif
						esc = 0;
						break;
					case 'B':
						if (y < getmaxy(scr))
							y++;
						#if !debug
						wmove(scr, y, x);
						#endif
						esc = 0;
						break;
					case 'C':
						if (x < getmaxx(scr))
							x++;
						#if !debug
						wmove(scr, y, x);
						#endif
						esc = 0;
						break;
					case 'D':
						if (x > 0)
							x--;
						#if !debug
						wmove(scr, y, x);
						#endif
						esc = 0;
						break;
					case 'H':
						if (!bcd[2] && !bcd[3]) {
							y = 0;
						} else {
							y = ((bcd[3]*10) + bcd[2]);
						}
						if (!bcd[0] && !bcd[1]) {
							x = 0;
						} else {
							x = ((bcd[1]*10) + bcd[0]);
						}
						#if !debug
						wmove(scr, y, x);
						#else
						/*mvwprintw(scr, 31, 0, "x: %i, y: %i  ", x, y);*/
						mvwprintw(scr, 31, 0, "bcd[3-2]: {%u, %u}, bcd[1-0]: {%u, %u}", bcd[3], bcd[2], bcd[1], bcd[0]);
						#endif
						idx = 3;
						bcd[0] = 0;
						bcd[1] = 0;
						bcd[2] = 0;
						bcd[3] = 0;
						esc = 0;
						break;
					case 'S':
						#if !debug
						wscrl(scr, -1);
						#else
						#endif
						esc = 0;
						break;
					case 'T':
						#if !debug
						wscrl(scr, 1);
						#else
						#endif
						esc = 0;
						break;
					case '0':
					case '1':
					case '2':
					case '3':
					case '4':
					case '5':
					case '6':
					case '7':
					case '8':
					case '9':
						bcd[idx--] = (addr[address] - '0');
						break;
					default:
						iscol = (addr[address] == ';');
						break;
				}
			} else {
				switch (addr[TX_ADDR]) {
					case 0xC:
						x=0,y=0;
						#if !debug
						wclear(scr);
						wmove(scr, y, x);
						#endif
						break;
					case CURSES_BACKSPACE:
					case '\b':
						if (x > 0) {
							x--;
							#if !debug
							wmove(scr, y, x);
							#endif
						}
						#if !debug
						wdelch(scr);
						#else
						if (!subdbg) {
							scr_col++;
							wmove(scr, 28, scr_col--);
							wdelch(scr);
							wmove(scr, 28, scr_col);
							wdelch(scr);
						}
						#endif
						break;
					case '\033': esc = 1; break;
					case '\n':
						x = 0;
						y+=1;
						#if !debug
						wmove(scr, y, x);
						#endif
						break;
					default:
						#if !debug
						/*wmove(scr, y, x);*/
						waddch(scr, addr[address]);
						#else
						if (!subdbg && scr_col < 160) {
							if (addr[address] != ' ') {
								wprintw(scr, "%02X", addr[address]);
							} else {
								wprintw(scr, "  ");
							}
						}
						#endif
						x+=1;
						break;
				}
			}
			break;
	}
}