DuoDrive problem

7 posts / 0 new
Last post
Spectre's picture
Offline
Last seen: 5 days 23 hours ago
Joined: Aug 17 2018 - 23:26
Posts: 19
DuoDrive problem

Hey there,

          I'm looking for some kind of a repair guide for a DuoDisk.  At this point it may be the controller or the drive itself.  Symptom at present is that Drive 1 is always selected regardless of what's chosen in dos, or copy proggy... 

 

Thanks for your time

 

A

speedyG's picture
Offline
Last seen: 5 months 2 weeks ago
Joined: Nov 16 2011 - 07:45
Posts: 2495
This page should help ahead

This page should help ahead:
http://www.appleii-box.de/H084_9_AppleIIDiskService9.htm

there are several links to related pages.

SpeedyG

Spectre's picture
Offline
Last seen: 5 days 23 hours ago
Joined: Aug 17 2018 - 23:26
Posts: 19
Thanks, I've seen that page,

Thanks, I've seen that page, while generally helpful didn't seem to cover this problem.  Maybe I need to read it more carefully ;)  I was kind of hoping this would be a fairly simple heres your likely problems go to it.  At the moment I can't tell if its the drive controller, which doesn't appear to be covered, but as I say, I'll go back and read more carefully :)

 

Thanks again,

A

Spectre's picture
Offline
Last seen: 5 days 23 hours ago
Joined: Aug 17 2018 - 23:26
Posts: 19
Is there anything that says

Is there anything that says what the device select signals should look like or where they come from?  I can't find anything about that anywhere

 

A

Online
Last seen: 3 min 47 sec ago
Joined: Jun 18 2010 - 13:54
Posts: 173
Check out: DuoDisk cable

Check out: DuoDisk cable pinout

Specifically look at ENBL A and B signals. If they are incorrect coming from the controller card, try replacing the 74LS132.

speedyG's picture
Offline
Last seen: 5 months 2 weeks ago
Joined: Nov 16 2011 - 07:45
Posts: 2495
http://www.appleii-box.de
Spectre's picture
Offline
Last seen: 5 days 23 hours ago
Joined: Aug 17 2018 - 23:26
Posts: 19
That doesn't help me much. 

That doesn't help me much.  Ideally I need some information about what the device enable signal should look like, what actually makes the signal, and just where it actually goes to inside the Duo.

Thanks for your time, but you don't seem to be able to help me there either.

 

Regards,

 

A

Log in or register to post comments