projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| cb1c44c2 KM |
1 | /* |
| 2 | * Copyright (c) 1980 Regents of the University of California. | |
| 3 | * All rights reserved. The Berkeley software License Agreement | |
| 4 | * specifies the terms and conditions for redistribution. | |
| 5 | */ | |
| 6 | ||
| 7 | #ifndef lint | |
| 8 | _sccsid:.asciz "@(#)tstoggle.s 6.2 (Berkeley) %G%" | |
| 9 | #endif not lint | |
| e3282431 SL |
10 | |
| 11 | /* | |
| 12 | * Prototype toggle in bootstrap code for ts type tapes. | |
| 13 | * If on anything but a 780 with the drive on uba0 | |
| 14 | * this will have to be repaired by patching uba and umem. | |
| 15 | */ | |
| 16 | .set UBA0,0x20006000 | |
| 17 | .set UMEM0,0x2013e000 | |
| 18 | .set UBA_MAP,0x800 | |
| 19 | .set TSADDR,0772520-0760000 | |
| 20 | ||
| 21 | start: | |
| 22 | movl uba,r10 | |
| 23 | movl mrv,UBA_MAP(r10) | |
| 24 | addl3 mrv,$1,UBA_MAP+4(r10) | |
| 25 | addl3 umem,$TSADDR,r11 | |
| 26 | clrw 2(r11) | |
| 27 | 1: tstb 2(r11) | |
| 28 | bgeq 1b | |
| 29 | movw $0x200+setchr,(r11) | |
| 30 | 1: tstb 2(r11) | |
| 31 | bgeq 1b | |
| 32 | movw $0x200+read,(r11) | |
| 33 | halt | |
| 34 | .align 2 | |
| 35 | uba: .long UBA0 | |
| 36 | umem: .long UMEM0 | |
| 37 | mrv: .long 0x80000000 | |
| 38 | setchr: .word 0xc004,0x200+char,0,0x8 # set characteristics command | |
| 39 | char: .word 0x200+status,0,0xe,0 # characteristics | |
| 40 | read: .word 0xc001,0,0,0x200 # read command | |
| 41 | status: |