| 0,0 → 1,37 |
|---|
| /* |
| * input keyboard routines used by the SvarDOS installer. |
| * Copyright (C) 2016 Mateusz Viste |
| */ |
| |
| #ifndef input_h_sentinel |
| #define input_h_sentinel |
| |
| #include <dos.h> |
| #include "input.h" /* include self for control */ |
| |
| /* waits for a keypress and return it. Returns 0x1xx for extended keys */ |
| int input_getkey(void) { |
| union REGS regs; |
| int res; |
| regs.h.ah = 0x08; |
| int86(0x21, ®s, ®s); |
| res = regs.h.al; |
| if (res == 0) { /* extended key - poll again */ |
| regs.h.ah = 0x08; |
| int86(0x21, ®s, ®s); |
| res = regs.h.al | 0x100; |
| } |
| return(res); |
| } |
| |
| |
| /* poll the keyboard, and return the next input key in buffer, or -1 if none */ |
| int input_getkeyifany(void) { |
| union REGS regs; |
| regs.h.ah = 0x0B; |
| int86(0x21, ®s, ®s); |
| if (regs.h.al == 0xFF) return(input_getkey()); |
| return(-1); |
| } |
| |
| #endif |