osiweb.org

Nama is correct about leaving the drive alone, go one more step and unplug the 610. Most monitors with comp in should work, but not all can sync with the video rate. reseat all socketed chips, and watch out for bad ram. several members have interfaces to modern drive's like the one below the red lig...

one more thing

the memory board needs it own 5v supply, make sure it is powered buy one of the 2 supplies separately

Grant

That looks better, 5v is good, im gonna bet on a few bad 2114 ram chips, try pulling all the ram on the ram board leave in the first 2, then pop out the ram on the video board and swap with some of the ones you removed, if you have a tester then test them, I just bought a pile of nos 2114 and about ...

If you have a tv with composite in I would try using that and cut out the rf modulator , one less thing to worry about

Grant

Welcome!! it is very important to always check the power supplies in vintage computers before hand. check ,clean and reseat all connections and boards is the next step, then dig into the schematics. the Sams manual would be best for troubleshooting. If you have the means, it would be very important ...

And lastly a little off-topic, At the same place I got the 4P, I found an "OSI 510 CPU" in a sad little dust covered box. I couldn't find it on the hardware list so... what it it?

i'll take it off your hands if you don't want it

Model 510 Triple CPU Board (6502, Z80, 6800) © 1979

Grant

Jeff wrote:Mark, do you know what those white bus connectors are called and if they are available to buy still?

Also, do you have any info on PBC houses that do one-offs at a reasonable price?

I'm sure you know what I am thinking!

these should work

http://www.digikey.ca/product-detail/en/0/WM3309-ND

I thought i would document my boot disk creation for the C1P using 5.25 image using the C1P-OS65D_3.1.65D this should work for C4P using OS-65D V3.2 (NMHZ).65D ** Tutorial disk 5 is a full boot disk with all the utils needed including single or dual disk copy,asm and em** **Warning Do not try to boo...

I have a started on a 620,630 and a 480 , it would be great if someone with a 48 pin buss could measure the spacing between the 4 molex connecters for me.

TIA

Grant

Glad you found this site!, it is exciting to hear from the creator of hexdos, welcome

Grant