Re: Replacement drive mechanism for 1581

From: Mike Stein <*mhs.stein_at_gmail.com*> Date: Tue, 23 Aug 2016 12:27:37 -0400 Message-ID: <065F7FA9BBBE46F285209FE64E8D84EE@310e2> · mhs.stein_at_gmail.com

----- Original Message ----- 
From: "Michał Pleban" <lists@michau.name>
To: <cbm-hackers@musoftware.de>
Sent: Tuesday, August 23, 2016 9:32 AM
Subject: Re: Replacement drive mechanism for 1581

> Hello!
> 
> Mike Stein wrote:
> 
>> What do you base that on? Can't say that I've ever seen a system other than PC-compatibles that doesn't use drive 0 for the main or only drive.
> 
> Just for the sake of purity, that's exactly what Commodore 900 does -
> its only 5.25 drive is connected as drive #1 not #0 (and the operating
> system properly addresses it as fd1 not fd0). So it's not uncoinceivable
> that they did the same with 1581.
> 
> Regards,
> Michau

---------------------------------

Well, I've never actually "seen" the inside of a 900 ;-)

Interesting; there are indeed many more things than are dreamt of in my philosophy. Seems odd though; since the 900 has provisions for two drives (DS0 and DS1) how would a dual-drive system be configured?

Nevertheless, in the 1581 pin 10 is grounded while pin 12 is NC, which does suggest that the 1581's drive should probably be set to DS0...

m

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