DEC bootstrap device codes
From Computer History Wiki
DEC bootstrap ROMs for the PDP-11s, from the M9301 ROM on, allowed use of a symbolic device name to specify a device to boot from, when using the console emulator function.
These codes included (not all were supported by all ROMs):
| Code | Controller | Device | Description |
|---|---|---|---|
| CR | CR11 | - | Punched card |
| CT | TA11 | TU60 | Casette magnetic tape |
| DB | RH11/RH70 | RP04/RP05/RP06 RM02/RM03 |
Removable cartridge disk |
| DD | DL11 | TU58 | Casette magnetic tape |
| DK | RK11 | RK03/RK05 | Removable cartridge disk |
| DL | RL11 | RL01/RL02 | Removable cartridge disk |
| DM | RK611 | RK06/RK07 | Removable cartridge disk |
| DP | RP11 | RP02/RP03 | Removable cartridge disk |
| DS | RH11/RH70 | RS03/RS04 | Fixed-head disk |
| DT | TC11 | TU55/TU56 | DECtape magnetic tape |
| DU | Various | RD51/RX50/RC25 RA80/RA81 |
Fixed disk |
| DX | RX11 | RX01 | Low-density floppy drive |
| DY | RX211 | RX02 | High-density floppy drive |
| MM | TM02 | TU16/TE16 | Magnetic tape |
| MS | Various | TS04/TU80 | Magnetic tape |
| MT | TM11 | TU10/TS03 | Magnetic tape |
| MU | Various | TU81/TK50 | Magnetic tape |
| PR | PC11 | PC05 | High-speed paper tape |
| TT | DL11 | Various | Serial line, low-speed paper tape, etc |
