The text read off it
[90.03.02]
the generated File Block and the assignment of each file to a Buffer Pool and to transmit the location of any non-standard label routines to the IOCS System. File type, mode, allowable I/O units and blocking requirements are among those items which may be assumed as unchanging by the generated object program and hence are recorded in File Check Table to insure that the user does not change these via modification of *FILE cards and *SPEC cards.
2. Card Format
Word 1 - standard 9L format. text type 011.
Word 2 - checksum
3-4 - file check entry i
5-6 - file check entry i + 1
. etc.
. etc.
. etc.
3. File Check Entry Specifications
Two words of text are required for each file referenced in a program. Their format is:
Bit Content
1st word of file S If = 1, mixed mode file
check entry 1-5 0
6 If = 1, binary mode
= 0, BCD mode
7-8 If = 00, Input
= 01, PTO
= 10, TTO
= 11, Checkpoint
9-17 0
18-20 If = 001 Card equipment only
010 Tape drive only
011 Either tape or card allowable
21-35 File reference number
2nd word of file S If = 1, this is last entry of the File
check entry Check Table
1-2 0
3-17 0 or relative loc non-standard label
routine
18-20 If = 000 N = blocksize
If = 001 N ≤ blocksize
If = 010 N = blocksize a multiple of N
21-35 N