KLund1
Veteran Member
Hi again.
I have a 16-64 5150 board with a bank 0 ram fault.
All other banks are unpopulated, and the SW1 is set to only bank zero. I have done the piggy back thing to all nine chips, but I get the same fault from SuperSoft/Landmark Rom test. I am not certain my that all my extra ram chip are good. Most probably are but Iam not sure which. (I with there was a cheap ram tester like there is for LS74xx IC's)
When I run the test I first show location 4050, then on the 2nd try, it show location 4000. That is is I am reading it right. it looks like the characters are doubled or missing.
See picture.
Which chip(s) are bad?
Thanks
I have a 16-64 5150 board with a bank 0 ram fault.
All other banks are unpopulated, and the SW1 is set to only bank zero. I have done the piggy back thing to all nine chips, but I get the same fault from SuperSoft/Landmark Rom test. I am not certain my that all my extra ram chip are good. Most probably are but Iam not sure which. (I with there was a cheap ram tester like there is for LS74xx IC's)
When I run the test I first show location 4050, then on the 2nd try, it show location 4000. That is is I am reading it right. it looks like the characters are doubled or missing.
See picture.
Which chip(s) are bad?
Thanks