DEC bootstrap device codes

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
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	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