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HELP: Need to retarget 80C51/80C52 assy code to AT89

New poster. My company long ago assembled code for our NXP 87C52X2 product with a Keil compiler, and now at least 10 years later we would like to retarget the same code with little to no changes to a AT89S52 processor.

Anyone have any insight into both the adjustments needed on the AT89S, as well as the reuse of the code?

We owned a Keil assembler setup, bought back in the early naughts, but now we can't find the serial number or other materials for it. Ugh.

Any suggestions/thoughts/criticisms would be sorely appreciated, as I'm not sure what to work on first.

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  • Holy smokes. Looks like I was wrong about the Assembler used on this product - here's the LIST file header.

    Micro Computer Control Corp. MA51 (T) 8051 Relocatable Macro Assembler Version 1.14 07-JAN-93

    I have no idea how to track down this assembler...

    I'll have to keep looking for what we built on the A51/C51.

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  • Holy smokes. Looks like I was wrong about the Assembler used on this product - here's the LIST file header.

    Micro Computer Control Corp. MA51 (T) 8051 Relocatable Macro Assembler Version 1.14 07-JAN-93

    I have no idea how to track down this assembler...

    I'll have to keep looking for what we built on the A51/C51.

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