Looking for someone to help me port some old Rockwell 6502 assembly code over to a ST Microelectronics ST7 series micro. All in all, there is a few k bytes of code that need converted. I have already ported over some of the easy stuff (no timers, complicated math, etc).
I can provide the original 6502 binary (no source), the disassembled code, and any ST documentation you would require.
Of course, looking to compensate you for your time ;-)
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What abouta description of the hardware that the 6502 ran on? It would be nice to know where RAM, ROM, EEPROM, I/O is. Why no source?
I can take a shot at it. I know 6502 but have never done anything with ST7.
Gary, Good points. I am a hardware guy and didn't think about those details.
The 6502 application used 3 6632s as PIAs for I/O. It also used the timers on the 6532s to do some IRQ hardware interrupts. The RAM and EPROM from the original were, of course, external to the 6502. I have the memory maps of the original 6502 application as well as the new memory map of the ST7.
The reason I do not have the original source code is that the company that originally produced the product has been dead for over 15 years.
code,
nice
ST7.
>Hi, you would do better to start again from scratch.
As a test, I've run asm->asm conversions in parallel with asm->C conversions. I'd strongly recommend NOT converting assembler to assembler - all you end up doing is simulating the original processor. A better approach is to use the 6502 code as a guide while recreating the original spec (have to concur with CBarn's comment). If you really must, convert asm to C - but you'll get better results if you create an engineering spec then completely ignore the original 6502 assembly implementation.
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