source:
trunk/minix/lib/i86/em/em_csa2.s@
9
| Last change on this file since 9 was 9, checked in by , 13 years ago | |
|---|---|
| File size: 358 bytes | |
| Line | |
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| 1 | .define .csa2 |
| 2 | |
| 3 | .text |
| 4 | .csa2: |
| 5 | ! bx, descriptor address |
| 6 | ! ax, index |
| 7 | mov dx,(bx) ! default |
| 8 | sub ax,2(bx) |
| 9 | cmp ax,4(bx) |
| 10 | ja 1f |
| 11 | sal ax,#1 |
| 12 | add bx,ax |
| 13 | mov bx,6(bx) |
| 14 | test bx,bx |
| 15 | jnz 2f |
| 16 | 1: |
| 17 | mov bx,dx |
| 18 | test bx,bx |
| 19 | jnz 2f |
| 20 | ECASE = 20 |
| 21 | .extern .fat |
| 22 | mov ax,#ECASE |
| 23 | push ax |
| 24 | jmp .fat |
| 25 | 2: |
| 26 | jmp (bx) |
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