| 27,7 → 27,8 |
|---|
| */ |
| |
| static enum cmd_result cmd_echo(struct cmd_funcparam *p) { |
| const char *arg = p->cmdline + 5; |
| unsigned short offs = FP_OFF(p->cmdline) + 5; |
| unsigned short segm = FP_SEG(p->cmdline); |
| |
| /* display help only if /? is the only argument */ |
| if ((p->argc == 1) && (imatch(p->argv[0], "/?"))) { |
| 66,11 → 67,13 |
|---|
| _asm { |
| push ax |
| push dx |
| push ds |
| push si |
| |
| mov si, [arg] |
| mov si, [offs] |
| cld /* clear direction flag (DF) so lodsb increments SI */ |
| mov ah, 0x02 /* display char from DL */ |
| mov ds, [segm] |
| NEXTYBTE: |
| lodsb /* load byte at DS:[SI] into AL and inc SI (if DF clear) */ |
| or al, al /* is AL == 0? then end of string reached */ |
| 87,6 → 90,7 |
|---|
| int 0x21 |
| |
| pop si |
| pop ds |
| pop dx |
| pop ax |
| } |