24 bytes track 0 cylinder 0 1PL record -puts system into wait state if storage device is loaded (via IPt function).
f 1100 02 00 00 00 00 00 00 03 00 00 00 20 00 00 CO 00 00 00 00 00 00 00 001 '--- J
Figure 3-4. Record 1 For.atl 4096 bytes - track 0 cylinder 0 Checkpoint record -this is the Checkpoint prograa load at V8/370 1Pt ti.e to retrieve and save control inforaation for a war. start.
Figure 3-5. Record 2 Format1 consists of a 4-byte key and an aO-byte record.
Key Data
,I I Pointer key I Key I Label FO to VTOC 00 40 00 CP370 40 pointer
to userI I I I Directory I .J 0 3 0 4 10 11 16 21 41 46 51 52
Figure 3-6. Record 3 Format
72IBM VM/370 Service Routines Program Logic
iI 401 I I 56 79
f 1
Figure 3-4. Record 1 For.at
Figure 3-5. Record 2 Format
Key Data
,
to user
Figure 3-6. Record 3 Format
72
i