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 ;-)

Remove NOSPAM from direct email responses.

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.


"Gary Kato" <garykato@aol.com> wrote in message
news:20040118174139.19998.00000188@mb-m17.aol.com...

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.