Voltages test results:
+12v
+5v
-5.1v
Simple testing shows the RAM is getting +12v etc.
Clym5 wrote:RonTurner wrote:I soldered an IC socket onto an IC clip to come up with this device for piggy backing 4116's,
Patent pending
...
That's just brilliant! I'm gonna have to make one for C64 RAM ICs...
Thanks, if it works let me know
I tested the 4116 in my Apple europlus motherboard, piggy backing any of the chips did not stop the apple 2 from working, I tried dozens of 4116's on the motherboard until I found a dead one, on this I tried the piggy backer and it did not fix it, ambiguously the piggy backing did not stop any RAM chips from working.
So far progression timeline (also known as regression in this case) goes as follows:
* initially the computer chirped and had a garbled picture, after a few seconds the picture went out (but it still chirped).
* when I got it home it chirped, then it stopped chirping so I cleaned the motherboard then it started chirping again.
* then it stopped chirping (I promise I did not even touch it !).
apparently from here there can only be progression as all the regression that is possible has already happened
.
So I took the CPU out of the CBM and put it in my Apple 2 and the MOS CPU still works anyway, re-tested the voltages (alls well), I'm going to need some cleaner solvent for the sockets (I suspect IC sockets due to intermittent failure) so in the meantime I will keep cleaning the outside.
When I push the IC's into the sockets they make that crunching sound, I'm going to replace them with quality wire wrap sockets.