| 19,8 → 19,20 |
|---|
| SIG1 dw 0x1983 ; +0 |
| SIG2 dw 0x1985 ; +2 |
| SIG3 dw 0x2017 ; +4 |
| SIG4 dw 0x2019 ; +6 this acts also as a guardval to detect stack overflows |
| SIG4 dw 0x2019 ; +6 acts also as a guardval to detect severe stack overflows |
| |
| ; Buffer used to remember previous command, when SvarCOM calls the buffered |
| ; input service at INT 21h,AH=0x0A. |
| ; This buffer is right before the stack, so in case of a stack overflow event |
| ; (for example because of a "too ambitious" TSR) only this buffer is damaged, |
| ; and can be invalidated without much harm. |
| INPUTBUF: times 130 db 0 |
| |
| ; This stack sig is a guardian value that is checked by the transient part of |
| ; SvarCOM to detect possible stack overflows. If a stack overflow occurs, then |
| ; the INPUTBUFF area above is invalidated and stack signature reverted. |
| STACKSIG dw 0xCAFE |
| |
| ; DOS int 21h functions that I use require at least 40 bytes of stack under |
| ; DOS-C (FreeDOS) kernel, so here I reserve 64 bytes juste to be sure |
| STACKBUF db "XXX SVARCOM RMOD BY MATEUSZ VISTE XXXXXXXXXXXXXXXXXXXXXXXXXXXX" |