| 9,8 → 9,10 |
|---|
| ; and respawning COMMAND.COM whenever necessary. |
| |
| CPU 8086 |
| org 0h ; this is meant to be executed without a PSP |
| org 0x100 |
| |
| PSP_ENVSEG equ 0x2C |
| |
| section .text ; all goes into code segment |
| |
| ; offset |
| 54,13 → 56,13 |
|---|
| ; do I have a valid COMSPEC? |
| or [COMSPECPTR], word 0 |
| jz USEDEFAULTCOMSPEC |
| ; set ES:DX to actual COMSPEC |
| mov es, [ENVSEG] |
| ; set ES:DX to actual COMSPEC (in env segment) |
| mov es, [PSP_ENVSEG] |
| mov dx, [COMSPECPTR] |
| USEDEFAULTCOMSPEC: |
| |
| ; prepare the exec param block |
| mov ax, [ENVSEG] |
| mov ax, [PSP_ENVSEG] |
| mov [EXEC_PARAM_REC], ax |
| mov ax, CMDTAIL |
| mov [EXEC_PARAM_REC+2], ax |