[Coco] CoCo 1 troubles

[Salvador Garcia]

 Thank you again Rick!

The cable I have is flat. No twists.

I see a bunch of chips, but none of them are 7406 or 7416. I see one 7407 in position 7.

I connected the drive to the outermost connector of the cable and the system recognized it as drive 1. I was able to start a DSKINI1, but it did not finish, producing an IO ERROR after it finished stepping 34 times. I suspect that the next step is to swap out the cable. 

Salvador




    El miércoles, 23 de diciembre de 2020 04:11:56 p. m. CST, Rick Ulland <rickulland1 at gmail.com> escribió:  
 
 If the cable has a few wires mid cable that are twisted, then position 
matters. If it is flat all the way thru, it does not.  But DIR 0 DIR 1 
should have worked either way.

There are two line driver chips (7406 or 7416) that are easily killed. 
So much so, CoNect had a SKU to socket & replace those back in the day.  
Push comes to shove, I'd question those first.

-ricku