Re: Replacement drive mechanism for 1581

From: Mike Stein <*mhs.stein_at_gmail.com*> Date: Sat, 24 Sep 2016 00:26:37 -0400 Message-ID: <869E687BCCC54DE2A1CA12CF56A3E1E7@310e2> · mhs.stein_at_gmail.com

Once again: floppy drives do not have "Motor Enable 0 or 1"; there is only one "Motor Enable", pin 16

IBM's non-standard twisted cable has Motor Enable A and B, but they both refer to the same pin (16), on drive A and B; the twisted cable connects pin 16 of each drive to separate pins on the PC controller.

Pin 10 is drive select 0; your drive presumably has pin 12 (DS1) jumpered and grounded in order to work.

Could you be using the wrong type of disk?

m

----- Original Message ----- 
From: "William Levak" <wlevak@SDF.ORG>
To: <cbm-hackers@musoftware.de>
Sent: Friday, September 23, 2016 7:51 PM
Subject: Re: Replacement drive mechanism for 1581

> 
> Partial success.
> 
> I got rid of the "drive not ready error" by disconnecting line 10 (motor 
> enable 0".  Apparently this was handled first, preventing motor enable 1 
> from working.
> 
> I can read, but attempting to format a disk gives various read and write 
> errors.
> 
> 
> wlevak@sdf.lonestar.org
> SDF Public Access UNIX System - http://sdf.lonestar.org
> 
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