0 (0) |
CHARACTER |
4 |
DS7KEYID |
KEY IDENTIFIER (X'07070707') |
SPACE FOR 5 F7 ENTRIES
|
4 (4) |
CHARACTER |
40 |
DS7EXTNT |
SPACE FOR 5 EXTENT DESCRIPTIONS |
44 (2C) |
CHARACTER |
1 |
DS7FMTID |
FORMAT IDENTIFIER (X'F7') |
SPACE FOR 11 F7 ENTRIES
|
45 (2D) |
CHARACTER |
88 |
DS7ADEXT |
SPACE FOR 11 EXTENT DESCRIPTIONS |
133 (85) |
CHARACTER |
2 |
|
RESERVED |
DESCRIPTION OF THE F7 FORWARD POINTER
|
135 (87) |
CHARACTER |
5 |
DS7PTRDS |
POINTER (CCHHR) TO NEXT FORMAT 7
DSCB OR ZERO |
135 (87) |
|
* |
DS7CCPTR |
TWO BYTES OF CYLINDER DATA (CC) |
|
|
* |
DS7HHPTR |
TWO BYTES OF HEAD DATA (HH) |
|
|
* |
DS7RPTR |
ONE BYTE OF RECORD DATA (R) |
|
|
* |
DS7END |
END OF THE DSCB 7 MAPPING |
SINGLE FORMAT 7 RTA EXTENT DESCRIPTION
EACH FORMAT 7 ENTRY HAS THE FOLLOWING FORMAT:
BYTES 0-3 START RTA ADDRESS
BYTES 4-7 END RTA ADDRESS + 1
|
|
CHARACTER |
8 |
DS7EXT |
DESCRIPTION OF ONE F7 EXTENT DESCRIPTION
ENTRY |
|
CHARACTER |
4 |
DS7RTAST |
STARTING RTA VALUE |
|
CHARACTER |
4 |
DS7RTAED |
ENDING RTA VALUE + 1 |