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Appendix C
C 8
Rung 1
200/06 and 200/4 are returned in the read operation and latch
077/00. When 077/00 is latched, the module toggles between a
read operation and a write operation.
121/00 is optional and lets the processor initiate a
block transfer write operation.
Rung 2
This rung examines the write done bit (122/06) and the valid
BCD data bit (200/04) to unlatch 077/00 and begin the
read only operation.
Rung 3
This rung contains the block transfer read instruction.
Rung 4
Use a file to file move to buffer the read data. Use addresses
0226 and 0227 when making any data comparisons.
Rung 5
A block transfer write is not done unless 077/00 is on.
Rung 6
This rung is for display purposes only.
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