SSDD 26 Each 256 Byte Sector Track Format

This is an IBM System 34 Disk 2 Standard format.

Field Length Data Clock Value (179X)
Gap I800x4ENA0x4E
Sync I120x00NA0x00
Sync I30xA10xC70xF6
IM10xFC0xD70xFC
GAP III500x4ENA0x4E
Following repeated 26 times to ***
Sync III120x00NA0x00
Sync III30xA1NA0xF5
AM 110xFE0xC70xFE
Cyl #10-76NA0-76
Head #10-1NA0-1
Rec #11-26NA1-26
N11NA1
CRC2CRCNA0xF7 (generates both CRC bytes)
GAP II220x4ENA0x4E
Sync II120x00NA0x00
Sync II30xA1NA0xF5
AM 210xFB0xC70xFB
Data2560xE5NA0xE5
CRC2CRCNA0xF7 (generates both CRC bytes)
GAP III540x4ENA0x4E
***
GAP IV~5980x4ENA0x4E
Total Bytes/Sector372
Total Bytes/Track10416

Bill

1504 MST 8 May 2013