CBM 8050 DUAL DRIVE NOT WORKING

[Desperado]

Yes now i try to load a game from cassette and save to disk

 

[Desperado]

Wow! Works perfectly
Thanks so much Daver and thanks so much to others for help!
So in this 8050 dual drive i changed two 2114 ic rams and one 6522 on Cbm Pet...
In the last, i tryied some different floppy disk to found a good one!

Daver, now can i switch on Vectrex

When you want, write me pm ( wine is waiting for you )!

 

[daver2]

>>> Don't be desperate. daver2 can help you fix any problem.

I think you are being somewhat optimistic Dave !

Nice to see millipede again after so many years!

Nice going!

Yep, turn the Vectrex on...

I have to go out now and buy a new computer for my wife... For some reason she didn't see the funny side of using Microsoft WORD on the PDP-8/E ...

Dave

 

[Desperado]

I think you are being somewhat optimistic Dave !

Daver2 it's like genius lamp!!!
Can i have one more desire please??

 

[Desperado]

Daver, sorry can i have one more little help please?
I receveid 8296-d pcb from my friend (he repaired some track), now seems to works correctly but some keyboard s' keys they don't match with
that i can see on screen. Letters and numbers are ok but if i press some symbols or some keys (inst del or crsr) don't match!
What can i do??

 

[Nivag Swerdna]

can i have one more little help please?

Please start a new thread to avoid confusion

 

[zippysticks]

No great ideas from me yet but I'm watching this thread very closely as I have just picked up an 8050 (and a working 8032) with seemingly with the same current problem - drive powers up, passes internal self test but does not carry our commands from the PET. Status light seems to flicker with command comms but goes into a red fail state for each command. The drive heads don't seem to be moving on mine.
Need to get my other 8050 (was working) from storage to compare the two - and probably swap parts to narrow the problem down on this 'new' one.

Won't distract from this current investigation unless I have a light bulb moment for you....please carry on !

Good to see this resolved
In the case of my 8050 problem - it turned out to be the pair of MC3446 bus transceivers responsible for the IEEE interface

 

[dave_m]

In the case of my 8050 problem - it turned out to be the pair of MC3446 bus transceivers responsible for the IEEE interface

Good work. Did you have any problem finding new 3446 chips?

 

[zippysticks]

Good work. Did you have any problem finding new 3446 chips?

Er, yes - they are pretty thin on the ground and expensive so I 'borrowed' a couple from a knackered donor board in my junk pile to test with.

 

[dave_m]

Er, yes - they are pretty thin on the ground and expensive so I 'borrowed' a couple from a knackered donor board in my junk pile to test with.

Good going, these chips are getting hard to find. I am hanging on to a few spares.