source:
trunk/minix/lib/i86/em/em_cms.s@
20
| Last change on this file since 20 was 9, checked in by , 14 years ago | |
|---|---|
| File size: 276 bytes | |
| Line | |
|---|---|
| 1 | .define .cms |
| 2 | |
| 3 | ! #bytes in cx |
| 4 | .text |
| 5 | .cms: |
| 6 | pop bx ! return address |
| 7 | mov dx,sp |
| 8 | push si |
| 9 | push di |
| 10 | mov si,dx |
| 11 | add dx,cx |
| 12 | mov di,dx |
| 13 | add dx,cx |
| 14 | sar cx,#1 |
| 15 | repe |
| 16 | cmp |
| 17 | je 1f |
| 18 | inc cx |
| 19 | 1: |
| 20 | pop di |
| 21 | pop si |
| 22 | mov sp,dx |
| 23 | jmp (bx) |
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