User`s guide

Using Storage Devices

Table 3–1 (Cont.): Physical-Device Names

Name Device Speciﬁed

DYn: RX02 diskette

DZn: RX50 diskette (Professional 300 series)

EL: Single-job monitor Error-Logger pseudodevice

LD: Logical-disk subsetting handler pseudodevice

LP: Line printer

LS: Serial line printer

MMn: TJU16/TJE16/TJU45/TJU77 magtape

MQ: Message queue pseudodevice for interjob communication under multi-job

monitors.

MSn: TK25/TS11/TSV05/TSU05/TU80 magtape

MTn: TM11/TMA11/TS03/TMB11/TU16/TE16 (TU1Q/TE1QW) magtape

MU: TMSCP magtape handler

NC: Ethernet handler (Professional 300 series)

NL: Null pseudodevice

NQ: Ethernet handler (Q-bus)

NU: Ethernet handler (UNIBUS)

PI: Professional 300 series interface handler

RKn: RK05 disk cartridge drive

SPn: Transparent spooler handler

TT: Console terminal keyboard and display (hard-copy or video screen)

UB: UNIBUS mapping handler

VM: Virtual (Extended) memory handler

XC: Communication port handler (Professional 300 series)

XL: Communication port handler

Specifying Logical-Device Names

In addition to using the physical-device names shown in Table 3–1, you can assign

logical names to devices. A logical name takes precedence over a physical name and

thus provides device independence. With this feature, you do not have to rewrite a

program that is coded to use a speciﬁc device if the device becomes unavailable. You

associate logical names with physical devices by using the ASSIGN command.

3–2 Using RT–11 Commands