atod
Experienced Member
Hi Folks,
I'm bringing up an ADM-3A (which I just repaired the keyboard to) and it appears it has bad RAM. This is the upper-lower case version with 14 2102 RAMs in two banks of 8. I believe each bank reflects the odd and even lines.
Does anyone know how to test this RAM either in board or out of board? I have a LA and scope. I guess I could just look for ASCII patterns ending up in ram upon key press, however I wonder if it would be easier to place in some sort of RAM tester. I would replace all the RAMs, but they are $3/ea and that's like $42 in RAM.
Also, does anyone know if there is a "drop in" faster replacement for 2102 RAM?
Thanks
I'm bringing up an ADM-3A (which I just repaired the keyboard to) and it appears it has bad RAM. This is the upper-lower case version with 14 2102 RAMs in two banks of 8. I believe each bank reflects the odd and even lines.
Does anyone know how to test this RAM either in board or out of board? I have a LA and scope. I guess I could just look for ASCII patterns ending up in ram upon key press, however I wonder if it would be easier to place in some sort of RAM tester. I would replace all the RAMs, but they are $3/ea and that's like $42 in RAM.
Also, does anyone know if there is a "drop in" faster replacement for 2102 RAM?
Thanks