LUBTAB, LUBPR LUBTAB is a device table that has a 2-byte entry for each symtolic name used by CMS/DOS. The simulated LUB has 255 entries: 14 entries for the system logical units and 241 entries for Frogrammer logical units. System devices (SYSRDR, SYSIPT, SYSPCH, SYSLST, and SYSLOG) can be assigned to alternate devices. The system and programmer tables are
defined with separate DSECTs: LUBTAB and LUBPR. LUBTAB is pointed to by the LUEPT field
in BGCOM. The address of the first LUB entry is in the first tyte of the FICL control tlock. System (LUBTAB) I 0 I LUBRDR lUBIPT LUEPCH LUBLST I 8 I lUB10G 1//1UB1NK/////1 LUERIS LUBSLB I 10 I LUBR1B 1//1UBUSE/////I//LUERIC//////1 LUBCLE I 18 1//1UBVIS////1 lUBCAT Programmer (lUBPR) o lUBOOO lUB001 LU13C02 LUB003 8 lUB004 through LU13239 1EO lUB240 LUB241 Hexadecimal Field
Displacement Name o
2 4 6
8
A
C
E 10 12
14
16
18
1A
o
2
4
6
8 1EO 2I.§t el! lUBRDR LUBIPT lUBPCH lUB1ST lUB10G lUB1NK lUBRES lUB51B lUBR1B lUBUSE lUBREC LUBC1B LUBVIS lUBCAT DS DS DS DS DS DS DS DS DS DS DS DS DS DS lU!!§ X12 X12 X12 X12 112 112 X12 112 X12 X12 112 112 X12 112 LUBOOO DS XL2 LUB001 DS X12 LUB002 DS X12 LUB003 DS X12 LUB240 DS 112 Field Description, Contents, Meaning System virtual reader System virtual input device System virtual punch System virtual printer
Terminal
Reserved for IBM use Systea residence volume Private source statement library
Private relocatable library
Reserved for IBM use
Reserved for IBM use
Private core i.age library
Reserved for IBM use VSAM catalog Programmer logical unit blcck Programmer logical unit blcck Programmer logical unit blcck Programmer logical unit block LU13CC4 through LUB239 are defined with DS and XL2. Each is a prograamer logical
unit block.
Programmer logical unit tlock 202 IBM VM/370 Data Areas and Control Block Logic

Eexadecimal Field
Displacement Name
------------ lE2 LUB241 DS LUBP EQU LUBJ EQU LUBL EQU XL2 0 1 *-LUB241 LUBTAB. LUEPB Field Description. Contents, Programmer logical unit blcck
Displacement to PUB pOinter
Displacement to JIB pointer LUE length
Section 2. Iata Areas and Control Blocks 203