mikejmoffitt
Member
I got a Centipede recently and have been cleaning and fixing it.
With the mikesarcade 2 1/4" trackball rebuild kit, the trackball does not roll well. The rollers seem like they are not as thick as the originals, and aren't making very good contact. I may try another kit.
Periodically, I'll lose Y movement (up/down). After around 30 seconds - one minute, it'll drop vertical movement for about five seconds, and then it'll come back. I've swapped pokeys, and I've tried moving the encoder wheel by hand. It is too regularly intermittent to be just loose wiring or a bad contact on the board I think.
The other problem is that there are small visible sparkles in the video output that correspond directly with CPU activity (dense at the top of the raster, sparse except for a few interrupt handles partway through the screen a few more times).
I haven't replaced the big blue or worked on the ARII yet, so that is the next step.
Has anyone seen these issues?
The screen control was turned up a bit to make the issue more visible for the photograph. Normally the black area is properly black, and you can see the speckles more faintly.
With the mikesarcade 2 1/4" trackball rebuild kit, the trackball does not roll well. The rollers seem like they are not as thick as the originals, and aren't making very good contact. I may try another kit.
Periodically, I'll lose Y movement (up/down). After around 30 seconds - one minute, it'll drop vertical movement for about five seconds, and then it'll come back. I've swapped pokeys, and I've tried moving the encoder wheel by hand. It is too regularly intermittent to be just loose wiring or a bad contact on the board I think.
The other problem is that there are small visible sparkles in the video output that correspond directly with CPU activity (dense at the top of the raster, sparse except for a few interrupt handles partway through the screen a few more times).
I haven't replaced the big blue or worked on the ARII yet, so that is the next step.
Has anyone seen these issues?
The screen control was turned up a bit to make the issue more visible for the photograph. Normally the black area is properly black, and you can see the speckles more faintly.