Can you read a dump? Do you have a dump?
Do you have a green card?
That's where I start, the PSW points to the abending instruction (or the next one), what's the op code, one that can cause an oc7?
Trace the cause of the 0c7 by looking at the fields base and displacement values, it should show garbage in the one.
Figure out how it got there and fix it.
Joined: 23 Nov 2006 Posts: 19270 Location: Inside the Matrix
The "green card" Bill referred to is an old tool used by programmers when the IBM/360 was used. It was a green "card" somewhat larger than a punch card. It contains all of the hex info about assembler instructions, what registers each instruction used, what type of instruction, the machine code for the instruction among other things. You probably don't have one.
When i figure out how to attach an image, i'll send you an electric copy of the card.