RDEVBLOK Hexadecimal Field
Displacement Name 3A RDEVTFLG DS 1X in RDEVTFLG RDEVLOG EQU --X'8'O-'-- 3B 3C 3D
3E
3F
46
47 RDEVREST EQU RDEVATOF EQU RDEVLOG EQU RDEVMORE EQU RDEVRUN EQU RDEVREAD EQU RDEVCPNA EQU RDEVTRQ EQU RDEVCTL EQU RDEVHOLD EQU RDEVGRTY DS RDEVLLEN DS RDEVATNC DS RDEVBASE DS RDEVRSV3 DS ORG RDEVTMCD DS RDEVTEXT EQU RDEVUSC8 EQU RDEYAPLC EQU RDEVAPLP EQU RDEVCORR EQU RDEVPTTC EQU RDEVSADN DS X'40' X'20' X'SO' X'40' X'20' X'10' X'OS' X'04' X'02' X'01' 1X 1X 1X 1H 1X RDEVMDL 1X in RDEVTMCD -X'20'-- X'10' X'OC' X'08' X'04' X'OO' 1X lield Description, Contents, Meaning Additional terminal flags TERM and GRll - Logon precess has been
initiated TER! - Terminal in reset process TERM - Suppress attention signal GRll - Logon process has been initiated GRAl - Screen full; more data waiting GRll - Screen in running status GRll - Read pending for screen input GRll - Last input not accepted GRll - Timer request pending GRAP - Control function interrupt pending GRll - Screen full; in hold status
Display alternate screen size index
Device line length
Device attention count 370x base address for emulator line
Reserved for IBM use Terminal code 3270 Text character set ISCII-8 level keyboard
APL Correspondence keyboard IPL PTTCjEBCD keyboard Correspondence keyboard PTTCjEBCt keyboard Terminal set-address number 1C 2E 30 38 3C 30 34 RDEVEPDV RDEVMAX RDEVNCP RDEVNICL RDEVCKPT ORG RDEV!IR! DS 1F ORG RDEVCYL DS 1H DS CL8 DS 1F DS 1F X2f ll1Q ORG RDEVNCP RDEVBSC DS 1F RDEVPDLY DS 1F Start of free RDEVBLOK list for EP line
Highest valid NCP resource name Reference name of active 3704 NCP Pointer to network control list Pointer to CKPBLOK for re-enable
Pointer to binary synchroneus centrol block
Poll delay timer interval S8 IBM VMj370 Data Areas and Control Block Logic

RECELCK RECBLOK maintains the correlation of DISD storage pages to a specific cylinder location.
Also maintained is a bit map to indicate the page slots available for data page storage.
The RDEVRECS field and the BDEVPAGE field of the RDEVELCK point to BECELCK. o
8 Hexadecimal Displacement
------------ 0 4
6
7
8 BECPNT RECCYL I R*1 I B*2 RECMAP (128 pages maximum) Field
Name Field Description, Contents, Meaning BECPNT DS 1F RECCYL DS 1B RECUSED DS 1X RECMAX DS 1X BECMAP DS 1L
Bits defined in RECMAP O-=-page-is-available R*1
B*2
1 - Page has been assigned
-------------------------------------- Pointer to next RECBLOK on cbain
Cylinder address for pages in this block Number of pages currently in use Maximum numter of pages available Page allocation bit map (128 Fages maximum) Although the size of RECMIP is fixed, the maximum number of pages
available on a cylinder is device dependent. Bits corresponding to pages not physically present on a cylinder are set to 1. RECSIZE EQU (*-BECB10Kj/8 BECELOK size in doutlewords
Section 1. CP Data Areas and Centrel Blocks 89