System Control Blocks

INTERRUPTION REQUEST BLOCK -- MVT
0(0) RBTMFLD 1 (1) RBPPSAV
Indicators Address of Problem Program Save Area
4 (4) RBABOPSW
Zeros or Right-Half of Users Old PSW
8 (8) RBWCSA 9 (9) RBSIZE 10 (A) RBSTAB
Wait-Count Save-Area Size of This RB Status and Attribute Bits
12 (C) RBEP
Entry-Point Address of Asynchronously Executed Routine
16 (10) RBOPSW
Old PSW
Link Field Segment Alternates
----3-::.--Sy-i-e--crn-k-:-F-ie-l-cf-Seg-me-nf----------------------------------------------------------------------------------------------------------------------------------------
24 (18) RBUSE 25 (19) RBIQE
ATTACH Use Count List Origin for IQE
2- Byte Link-Field Segment
24 (18) 26 (lA) RBRQE
Reserved List Origin for RQE
28 (1C)
,..j
::::::32 (20)
T
96 (60)
_ L. 100 (64)
RBWCF
Wait Count
29 (10)
(1) These 2 fiel ds are present only if requested
RBGRSAVE
General Register Save Area
RBNEXAV
(l)Address of Next Available IOE
(l)IQE Work Space (maximum: 1984 bytes)
Figure 24B. Interruption Request Block -- MVT
282 OS System Control Blocks (Release 21.7)
RBLINK
Address of Previous RB or TCB
27 (lB)
27 (1B)
19 (13)
,..j
T