Testing CoCo 2 RAM

[AussieAtari]

Does anyone know how to test the RAM in a CoCo2?

 

I am preparing 4 units for sale and one of them has a pretty dodgy looking 64K upgrade board and I would like to test that it is actually working as I don't want to make any false claims when selling it.

[JamesD]

Does anyone know how to test the RAM in a CoCo2?

 

I am preparing 4 units for sale and one of them has a pretty dodgy looking 64K upgrade board and I would like to test that it is actually working as I don't want to make any false claims when selling it.

Odds are if the computer works running a small Basic program it's good.

But it takes a machine language program to access the upper 32K RAM bank and test it.

 

I don't know of any programs you could type in off the top of my head but if you ask on the Coco3.com Forums they should be able to help you out.

 

A lot of coco upgrades look dodgy. Piggybacked RAM chips, perf board and other mods were common with the hardware hacker types. I did my own upgrade and it cost half as much.

[AussieAtari]

Thanks for the reply.

 

They all run basic BASIC programs and load and run cartridges and tapes so I'll take that as okay.

[JamesD]

Yeah, sounds safe. Just list how much testing you've done and if something else turns out to be bad it's not your fault.