Interestingly enough, I have two pinball game Roms that reach the same checksum with my eprom programmer, yet have different checksums from each other using the Fluke! I need to spend a little time to see if the Roms ARE identical or just what is going on here...

So, does anyone know HOW the Fluke generates it's checksum?? I'll pop a note off to Fluke Tech support and if I get an answer will post it here...

I do find that the Fluke is more dependable on doing a RAM test than the Cat Box. Seems more stable, or loads the circuit better. When the Fluke reads good ram, the ram is good, but the Cat Box sometimes flags the ram as bad. I am having trouble figuring out how to set up a test for 8255 i/o with the Z80 pod, any suggestions?

John :-#)#

At 05:29 PM 11/26/1999 -0500, ayeckley wrote:

>Follow up on my chat about this 9010 gizmo. What is it with the ROM
>checksums with this beastie? They are not the standard ones, and I am not
>sure what they represent. Here is what I get and the "correct" checksums"

This is not unique to the Fluke 9010. The problem is that there are
several ways of calculating a checksum. The Fluke appears to use
one of the less popular techniques. I use a known good board and
perform a ROM test to get the correct value - I don't think you can
convert from one technique to another.

BTW, lots of us would be happy to buy pods for the 9010. If anyone
stumbles on a treasure-trove of them, please speak up! Anyone want
want an 8086 pod? I need a 6502.

Alex
http://home.neo.lrun.com/ayeckle/
ayeckley@neo.lrun.com (Play)
yecklea@diebold.com (Work)