Thanks Dan

Yes the 6502 microPROCESSOR uses external 32k ROM and 2k SRAM and some strange peripheral chip.

Our current choice is a 2x8051 core (executes twice as fast). I think it can be clocked up to like 33Mhz.

I wasn't aware that the 6502 didn't have MUL or DIV type instructions. This in itself tells me that the 8051 should be able to exeucute math sequences faster and without the code size "blowing up".

Specifically I don't need to meet the same time requirement. I was just afraid that the 6502 may have some uber-great math instruction set compared to the 8051 that would mean I'd need to allocate alot more space in my estimations.

Doesn't look to be the case. Thanks again for the information.

J