| 1,5 → 1,5 |
|---|
| ; |
| ; rmod - resident module of the SvarCOM command interpreter |
| ; rmod - resident module of the SvarCOM command interpreter (NASM code) |
| ; |
| ; Copyright (C) 2021 Mateusz Viste |
| ; MIT license |
| 54,8 → 54,17 |
|---|
| REDIR_INFIL dw 0xffff ; +ECh |
| REDIR_OUTAPPEND dw 0 ; +EEh |
| |
| skipsig: ; +F0h |
| ; CTRL+BREAK (int 23h) handler |
| ; According to the TechHelp! Manual: "If you want to abort (exit to the parent |
| ; process), then set the carry flag and return via a FAR RET. This causes DOS |
| ; to perform normal cleanup and exit to the parent." (otherwise use iret) |
| BREAK_HANDLER: ; +F0h |
| stc |
| retf |
| |
| |
| skipsig: ; +F2h |
| |
| ; set up CS=DS=SS and point SP to my private stack buffer |
| mov ax, cs |
| mov ds, ax |
| 63,6 → 72,11 |
|---|
| mov ss, ax |
| mov sp, STACKPTR |
| |
| ; set up myself as break handler |
| mov ax, 0x2523 ; set int vector 23h |
| mov dx, BREAK_HANDLER |
| int 0x21 |
| |
| ; revert stdin/stdout redirections (if any) to their initial state |
| call REVERT_REDIR_IF_ANY |
| |