How to: Convert a 6800 to a 6502

[xcelite]

So I decided to convert my 6800 jumperless pod in to a 6502 and here is how i did it.

Processor board
Step 1: Change the cpu to a 6502A processor
Step 2: Reprogram the eprom with 6502 code (I got mine from a fellow klov'r)
If you decide to use the code with dual 6800 and 6502 in it you must take pin 19 and put it to +5v instead of ground.
Step 3: Remove u12 you dont need it even if you convert it back to a 6800 its not required
step 4: cut the traces that ive circled for you in white. Be careful not to cut to deep, The fluke pods are 3 layer boards the vcc and gnd connections are in the middle
Step 5: Remove R7 (part of the self test circuit)
Step 6: Install the jumpers were you see them i am working on a step by step but you still need a visual of the spot on the trace to cut. be carefull
Note: When connecting the self test make sure pin 39 on the test socket does not make connection i do this buy adding a 40 pin socket with pin 39 cut off of it then remove it when connected to the board im testing

Top side cuts


Bottom cuts and jumpers


Top side jumpers



I/o board
Simple take about five minuites to do
Step 1: cut the one trace that i circled
Step 2: Install the jumper
Step 3: One jumper you can't see is form pin 1 to pin 20 on u3 or u5
Cut trace


jumper



I am working of a pin for pin instructions. I do have my copy of the schematics but its all chicken scratch and would take a doctor to read it.

[troxel]

Nice write-up. Thanks for sharing!

[KI4SWY]

no only if you could convert it to a 6809 :P

wonder if you could do a Nintendo's CPU :P

[xcelite]

Originally Posted by KI4SWY

no only if you could convert it to a 6809 :P

wonder if you could do a Nintendo's CPU :P

Well 6809 in my next pod that i need and i wonder what cpu is most pin compatable.

[Talon2000]

Perfect. I've been holding off on doing mine because it had no jumpers. Plus I already have a working 6502 so didn't have a need yet.

[road.runner]

very nice indeed !!!!! thanks

[xcelite]

Enjoy im sure this will come in handy. If possible i need someone to do a high res scan of the 6502/6800 pod labels for me.

[road.runner]

will email you the scans today - mike

[xcelite]

Update: Its has'nt seem to be a problem so far but there is a pull up resistor that is off the sync line thats missing. A 1k will do fine just attach it across Pin 11 of u6 to 5v

[delroy666]

Excellent work, great pics. Thanks for sharing. Now if only you had posted this before I shelled out the cash for an actual 6502 pod.