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Storage To Diskette Dump (SI)
WHAT THIS UTILITY DOES
When you press the LOAD key on the console, the hardware loads this utility into main
storage from a pre-built dedicated diskette. The utility then dumps the contents of
storage to that same diskette.
HOW TO CREATE THE DISKETTE
HOW TO USE IT
You must create a special diskette for the storage to diskette dump.
Locate the ccchss of the program S1 on the system verification listing. Using the disk to
diskette copy program, copy the program S1 to the dedicated diskette. You must start
the copy 1 disk sector beyond the beginning of the program to remove the header record.
S1 must be placed on the diskette at cylinder 0, head 0, sectors 1 and 2.
Next, copy the second phase of the program to the dedicated diskette. Locate the
ccchss of the program S2 on the system verification listing. Using the disk to diskette
copy program, copy the program S2 to cylinder 1, head 0, sectors I through 26 of the
diskette. Once this
is
done, the diskette is ready for you to use.
Mount the special storage to diskette dump on the fixed address diskette device and set
the switch to alternate. After you press the LOAD key, the dump starts at storage address
256 and continues until all storage has been dumped. The first 256 bytes are destroyed
by the loading of the dump program. Also, on level 0, the IAR is altered by the dump.
THE OUTPUT YOU RECEIVE
The output from this utility is the storage dump onto the diskette. The HDR1 record
looks like this:
bytes
00-03
05-21
22-26
28-32
33
34-38
74-78
HDR1
data set identifier indicating that this is a dump data set
the block length, which is 128
the starting address of the dump, which is cylinder 2, head 0, sector
1
This area appears in cchss format and contains 02001.
the physical record length, which is 128
the ending address of the dump, which the utility provides in ccchss
format
the end of data address, which is updated by the dump program
This is the format of the dump.
Beginning at cylinder 2, head 0, sector 1:
• IAR, general-purpose register, and LSR for each level
• The address in storage where the dump begins
Beginning at cylinder 3, head 0, sector 1 is the storage dump.
Copy, Dump and Patch Programs
6-17
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