Difference between revisions of "RK11 disk controller"
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(Added disk-''n'' bootstrap) |
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|1014||105710||TSTB (r0) ||Test byte at 177404 | |1014||105710||TSTB (r0) ||Test byte at 177404 | ||
|- | |- | ||
| − | |1016||100376|| | + | |1016||100376||BPL *-1 ||Jump backward if positive |
|- | |- | ||
|1020||005007||CLR PC ||Jump to zero | |1020||005007||CLR PC ||Jump to zero | ||
Revision as of 00:24, 17 May 2007
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 | BPL *-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 |
