projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| e3282431 SL |
1 | /* tstoggle.s 4.1 83/02/16 */ |
| 2 | ||
| 3 | /* | |
| 4 | * Prototype toggle in bootstrap code for ts type tapes. | |
| 5 | * If on anything but a 780 with the drive on uba0 | |
| 6 | * this will have to be repaired by patching uba and umem. | |
| 7 | */ | |
| 8 | .set UBA0,0x20006000 | |
| 9 | .set UMEM0,0x2013e000 | |
| 10 | .set UBA_MAP,0x800 | |
| 11 | .set TSADDR,0772520-0760000 | |
| 12 | ||
| 13 | start: | |
| 14 | movl uba,r10 | |
| 15 | movl mrv,UBA_MAP(r10) | |
| 16 | addl3 mrv,$1,UBA_MAP+4(r10) | |
| 17 | addl3 umem,$TSADDR,r11 | |
| 18 | clrw 2(r11) | |
| 19 | 1: tstb 2(r11) | |
| 20 | bgeq 1b | |
| 21 | movw $0x200+setchr,(r11) | |
| 22 | 1: tstb 2(r11) | |
| 23 | bgeq 1b | |
| 24 | movw $0x200+read,(r11) | |
| 25 | halt | |
| 26 | .align 2 | |
| 27 | uba: .long UBA0 | |
| 28 | umem: .long UMEM0 | |
| 29 | mrv: .long 0x80000000 | |
| 30 | setchr: .word 0xc004,0x200+char,0,0x8 # set characteristics command | |
| 31 | char: .word 0x200+status,0,0xe,0 # characteristics | |
| 32 | read: .word 0xc001,0,0,0x200 # read command | |
| 33 | status: |