Re: Replacement drive mechanism for 1581

From: Mike Stein <*mhs.stein_at_gmail.com*> Date: Tue, 23 Aug 2016 13:32:24 -0400 Message-ID: <D39B39320B0F45CE8F6762B7EE654170@310e2> · mhs.stein_at_gmail.com

----- Original Message ----- 
From: "André Fachat" <afachat@gmx.de>
To: <cbm-hackers@musoftware.de>
Sent: Tuesday, August 23, 2016 12:50 PM
Subject: Re: Replacement drive mechanism for 1581

> Not sure how much actual info you can take out of it but some years ago I 
> had built a vc1581 replica with a PC drive. I don't remember the details 
> but maybe comparing schematics gives some more info.
> 
> http://www.6502.org/users/andre/cbmhw/ryo1581/index.html
> 
> Sorry for the late chime in...
> 
> Cheers
> André

Interesting!

Looks like you used a PC-type twisted pair for dual-drive motor control capability, but with the drives reversed so that a single drive would use a straight cable; makes sense.

I suppose on a PC they did it the other way so that the terminating resistors would always be on the cable end, even if using a dual drive cable with a single drive, but that's not particularly relevant in a 'custom' 1581 and not usually an issue anyway in the 'real world' (at least with floppies as opposed to hard drives).

m

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