[Coco] Regarding disk drives

[John Eric]

okay, thanks. I was thinking that the twist in the ibm cable meant that both drives had to be set as drive 1 and the twist in the cable allowed them to be accessed as 0 (a) and 1 (b). I guess I would be better served simply to make new cables from scratch. Thanks -Jeric




________________________________
From: Bill Barnes <da3m0n_slay3r at yahoo.com>
To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
Sent: Saturday, January 3, 2009 12:59:25 AM
Subject: Re: [Coco] Regarding disk drives

Not quite correct. For Drive 0, it would require different signals sent. drive 1 would work properly though. The signals needed to select and turn on drive 0 would not involve D1 and Motor signals... IIRC it was D0 and D2 signals were needed. To get it to work und DECB would require patching, OS-9 would require it too, and any program that bypassed DECB to access the floppies would run into problems without being patched (making them unusable on a non IBM cabled FDD system).

-Later!   -WB-    -- BABIC Computer Consulting.


--- On Fri, 1/2/09, John Eric <jet.pack at ymail.com> wrote:


> From: John Eric <jet.pack at ymail.com>

> Subject: [Coco] Regarding disk drives

> To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>

> Date: Friday, January 2, 2009, 11:53 PM

> Simple solution, crimp new connectors on a cable. However,

> I just had a thought. If I were to use IBM type floppy

> cables and jumper both drives as drive 1, that should work,

> right? I ask because I have a box full of 3M IBM type floppy

> + Tape drive cables - they have the standard 4 connectors at

> the end - 3.5" and 5,25" for Drive A (IBMspeak)

> and the same for drive B, separated by about 6" of

> cable, and then about 6" later, another 5.25" type

> connector intended for a tape drive. So, my thinking is, if

> I jumper two drives as drive 1, the end connectors will

> access them as drive 0 and 1 (because of the twist in the

> cable), and if I jumper a third drive as drive 2, the third

> connector should acces it as the third CoCo drive. So,

> before I order the IDC cable crimper and some connectors

> (the end that hooks to the FDC will have to be replaced with

> a CoCo type connector) - does this sound right?

> 

> Thanks - JEric

> 




      

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