Synchronous Ack/Nack In Lu-1 Mode - IBM 6400 Programmer's Reference Manual
Line matrix printers, intelligent printer data stream
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Also See for 6400:
- Programmer's reference manual (450 pages) ,
- Maintenance manual (428 pages) ,
- Maintenance information manual (422 pages)
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Figure 32. Synchronous ACK/NACK in LU-1 Mode. Change Direction not issued immediately after Signal.
Notes:
1. The printer processes the data sent by the host after the Signal.
2. After the host sends a Change Direction to the printer, the printer sends the
In Figure 33, the host sends an End Destination Select (EDS) after the Signal
sent by the printer. The host sends no Change Direction.
Figure 33. Synchronous ACK/NACK in LU-1 Mode. EDS issued after Signal.
ACK/NACK detected before the Signal.
IPDS for Control Units
Appendix B. Summary of IPDS for Control Units
177
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