AK6DN
Veteran Member
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Keep in mind the first time I looked at a PDP8 print was today. Ditto for the PDP8 instruction set. No NOP instruction. >.<
Perhaps the PDP8 guys can suggest another way to do that.
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Sure, from the PDP-8 reference card, first line documents NOP. Basically the operate instruction with no function bits enabled.
Code:
GROUP 1 OPERATE MICROINSTRUCTIONS (1.2 usec)
Sequence
[B]NOP 7000 no operation -[/B]
CLA 7200 clear AC 1
CLL 7100 clear link 1
CMA 7040 complement AC 2
CML 7020 complement link 2
RAR 7010 rotate AC and link right one 4
RAL 7004 rotate AC and link left one 4
RTR 7012 rotate AC and link right two 4
RTL 7006 rotate AC and link left two 4
IAC 7001 increment AC 3
IAC 7002 swap bytes in AC 4