| 3,6 → 3,8 |
|---|
| * Copyright (C) 2021 Mateusz Viste |
| */ |
| |
| #include <i86.h> /* MK_FP() */ |
| |
| #include "helpers.h" |
| |
| /* case-insensitive comparison of strings, returns non-zero on equality */ |
| 169,3 → 171,40 |
|---|
| } |
| return(res); |
| } |
| |
| |
| /* returns screen's width (in columns) */ |
| unsigned short screen_getwidth(void) { |
| /* BIOS 0040:004A = word containing screen width in text columns */ |
| unsigned short far *scrw = MK_FP(0x40, 0x4a); |
| return(*scrw); |
| } |
| |
| |
| /* returns screen's height (in rows) */ |
| unsigned short screen_getheight(void) { |
| /* BIOS 0040:0084 = byte containing maximum valid row value (EGA ONLY) */ |
| unsigned char far *scrh = MK_FP(0x40, 0x84); |
| if (*scrh == 0) return(25); /* pre-EGA adapter */ |
| return(*scrh + 1); |
| } |
| |
| |
| /* displays the "Press any key to continue" msg and waits for a keypress */ |
| void press_any_key(void) { |
| output("Press any key to continue..."); |
| _asm { |
| mov ah, 0x08 /* no echo console input */ |
| int 0x21 /* pressed key in AL now (0 for extended keys) */ |
| test al, al |
| jnz DONE |
| int 0x21 /* executed ah=8 again to read the rest of extended key */ |
| DONE: |
| /* output CR/LF */ |
| mov ah, 0x02 |
| mov dl, 0x0D |
| int 0x21 |
| mov dl, 0x0A |
| int 0x21 |
| } |
| } |