RK11 disk controller
From Computer History Wiki
The RK11 is the UNIBUS controller for the RK05 moving-head magnetic disk drive.
PDP-11 bootstraps
Disk 0
I know the octal data is correct, but I'm not sure about the mnemonics and the description.
| Address | Data | Mnemonic | Description |
|---|---|---|---|
| 1000 | 012700 | MOV #177406,r0 | Move the top of the address of the controller into r0 |
| 1002 | 177406 | (constant) | |
| 1004 | 012710 | MOV #177400,(r0) | Move 177400 into 177406 |
| 1006 | 177400 | (constant) | |
| 1010 | 012740 | MOV #000005,-(r0) | Move 5 into 177404 |
| 1012 | 000005 | (constant) | |
| 1014 | 105710 | TSTB (r0) | Test byte at 177404 |
| 1016 | 100376 | JMP *-1 | Jump backward if positive |
| 1020 | 005007 | CLR PC | Jump to zero |
Disk n
| Address | Data | Mnemonic | Description |
|---|---|---|---|
| 1000 | 012700 | MOV #177406, R0 | |
| 1002 | 177406 | (constant) | |
| 1004 | 012760 | MOV xxxxxx, 000004(R0) | |
| 1006 | xxxxxx | (disk ID number) | |
| 1010 | 000004 | (index) | |
| 1012 | 012700 | MOV #177406, R0 | |
| 1014 | 177406 | (constant) | |
| 1016 | 012710 | MOV #177400, (R0) | |
| 1020 | 177400 | (constant) | |
| 1022 | 012740 | MOV #000005, -(R0) | |
| 1024 | 000005 | (constant) | |
| 1026 | 105710 | TSTB (R0) | |
| 1030 | 100376 | BPL *-1 | |
| 1032 | 005007 | CLR PC |
