Hi all,
I've been experimenting with a 6502 bus monitor recently. If you are interested, you can read more here:
viewtopic.php?f=4&t=3323It supports address bus monitoring, single stepping, breakpoints (on instruction execution, read and writes), watches (which are non-intrusive) and as of yesterday a couple of external trigger inputs.
This is implemented a GODIL which contains Xilinx XC3S250E plus the necessary hardware to make it 5V compatible, all in a nice 40 pin DIL package, with jumpers to allow any power supply pin configuration.
I've been wondering about extending this to be a complete 6502 In Circuit Emulator, where it would replace the 6502 in the target system. It would need to be "hardware" compatible (according to the nomenclature in
this thread.
Does anyone have any thoughts on which 6502 core I should start with?
Has anyone successfully used a GODIL to replace a 6502 in a real system?
regards
Dave