IBM 2025 Maintenance Manual page 120

Field and Zone
Initial Field State at End
Command Command Sequence and Zone State of Command
Read Count, Key and Data
None Cl D4
Read Key and Data None Cl D4
After Search I D C4 D4
Read Data None Cl D4
After Search ID C4 D4
After Search Key K4
D4
Write Count, Key and Data Search Equal ID C4
D4
Search Equal Key K4
D4
Write RO
D4 D4
Write Count, Key and Data D4 D4
Write Key and Data Search Equal ID C4 D4
Write Data Search Equal ID C4
D4
Search Equal Key K4 D4
Search ID None Cl
C4
Search Key None Cl K4
After Read or Search ID C4 K4
Search Key and Data
None Cl 04
After Read or Search ID C4 D4
Search Home Address None HA H4
Read RO None HA D4
After Read or Search Home Address H4 04
Write RO Write Home Address
H4 D4
Search Equal Home Address H4 D4
Read Home Address None HA H4
Write Home Address None HA H4
Read Initial Program Load None Cl D4
Read Count None Cl C4
Erase Search Equal ID C4 D4
Search Equal Key K4 D4
Write RO 04 D4
Write Count, Key and Data 04 04
No Operation None
Reset Condition
Figure 1-116. 2311/DAC Track Orientation Field and Zone State Summary
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