SYSCOM SYSCOM describes the fields in the SYSCOM block which is the CMS/DOS equivalent ef the DOS/VS System Communication Region (SYSCOM). The ASYSCOM field in NUCCN Feints to the SYSCOM block in DMSNUC. I 0 IJBERBLC IJEAREX I 1 8 IJBERR19 IJBERR24 IJEPUBRS I 1 10 IJBFETCH IJEINTRT , I 18 IJBEXTRT IJELTA I I 20 IJBPPBEG IJECEINQ ! 1 28 IJBQSIZE IJBQLNG IJENPART 1/////////////1 30 IJBRSAVE IJECCNSP 38 IJBSAB IJECENTB 40 1* 1 1*2 A*3 A*4 IJESTID IJBEXIT 48 IJBPDADR IJETKHLD 50 IJBTIMER IJEAETAB
58 IJBLIK IJBTIK IJEPWR 60 IJBTCAVT IJERFTAB 68 IJBEUECB IJEOLTEP 70 IJBRASLN IJETRTAB
78 IJBPBOWN IJEJATIB 80 IJBPMGR IJECCWT 88 IJBSAVSD IJELNSTB 90 IJBAMCOM IJEAPTA 98 IJBSBLKO IJESBLKX AO 1*5 1*6 I 1*7 I 1*8 A*9 A*10 1///////////// ----------------------------------------------------1 18 ////////////////////////////1///////////////////////////1
-----------------------------------------------------1 BO ////////////////////////////1 IJEMVCAD I -----------------------------------------------------1
B8 ////////////////////////////1/////////////1/////////////1 I I COl IJBMFCER I I I C81 A*11 I IJEPUBLN IJBAPNO I Section 2. CMS Iata Areas and Control Blocks 239
SYSCO!! DO IJBSEGT IJBPFT D8 IJBPFTX IJBBOX EO IJBDPDTB 111111I111111I11111111111111 E8 IJBVIRAD IJBEOR FO IJBFTTAB IJBSVA F8 IJBSVIS IIIIIIIIIIIARPSLIIIIII/IIIII -------------------------------------------------------1 100 1111////IARPSRIIIIIII///IIIII IJEDLAB I 1----------------------------------------------------1 1081 SYS$CODE I I 1101 Hexadecimal Field
Displacement Name Field Description, Contents, Meaning a 4
8 A C 10 14
18
1C 20 24
28
2A
2C
2E 30 34
38
3C 40 41
42
43
44
46
48
4C
IJBERBLC DC IJBAREX DC
IJBERR19 DC
IJBERR24 DC IJBPOBRS DC
IJBFETCH DC
IJBINTRT DC IJ13 E_XTRT DC IJBLTA DC IJBPPBEG DC IJBFLPTR EQU IJBCH.1NQ DC IJBQSIZE DC
IJBQLNG DC IJBNP.1RT DC IJBRS.1VE IJBCONSP IJBS.1B IJBCHNTB IJBFLG01 IJBFLG02 IJBFLG03 IJBFLG04 IJBSTID DC
DC
DC
DC
DC
DC
DC
DC
DC
DC IJBSELCT EQU IJBEXIT DC IJBPDADR DC IJBTHPTR EQU IJBTKHLD DC A (0) A (0) H'O' H'O' F'O' A (0) A (0) A(O) i(O) A (0) * F'O' H'O' H'O' H'1' B'O' A (0) A (0) A (0) A (0) X'OO' X'OO' X'OO' X'OO' B'O' *-1 B'O' A (0) *-1
Address of error block
Exit address for attention
Cancel exit for attention
Cancel exit for attention SYSRES POE address
Address of fetch routine
Address of 1/0 interrupt routine
Address of external interrupt rcutine P()inter to logical ttansientarea Pointer to problem program area
Free list pointer Pointer to channel queue
Number of channel queue entries
Length of one error queue entry Number of partitions
Reserved for IBM use Pointer to channel buckets
Address of CRT table
Address of SAB table
Address of channel control table
A*1 Flags and switches
A*2 Switch byte
.1*3 Flags and switches
A*4 Flags and switches System task selection control field System task selection byte Pointer to task selection Pointer to PDAREA Track hold ELPTR Address of track hold tatle 240 IBM VM/370 Data Areas and Control Elock Logic
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