[Coco] FHL Color Flex

[Gene Heskett]

On Friday 05 April 2013 20:36:26 Bob Devries did opine:

> Hi all,
> 
> I have unearthed a disk here of FLEX 3.3. It *does* work on the Coco3; I
> booted it, and typed "cat" and got a file listing.
> 
> However... It is as I suspected, track 0 of the disk is not a standard
> format (probably single-density); it returns I/O error when I try to
> read it.
> 
> Does anyone know if it is possible to image such a disk?

No I do not know, Bob.  OS9 has a T0S (sectors) for track 0, but I've never 
played with a track 0 that wasn't the same density as the rest of the disks 
tracks.  But it might make for some interesting experimentation.

If I am interpreting what I recall reading in the docs, that would entail 
switching the circuit from 250 kilobaud to 125 kilobaud and changing the 
code for straight rather than NRZ.  My problem is that I do not recall ever 
seeing any references to such a control in the disk controller docs.
 
IF the 1773 can be switched is another detail I don't have at my 
fingertips.  If it can, then the problem is possibly going to be the 
finding of an available byte to hide the switch data in, AND making sure it 
gets written  to the 1773 on a T0 access.

> Regards, Bob Devries
> Dalby, QLD, Australia
> 
> ----- Original Message -----
> From: "Luis Fernأ،ndez" <luis46coco at hotmail.com>
> To: "COCO" <coco at maltedmedia.com>
> Sent: Saturday, April 06, 2013 1:02 AM
> Subject: Re: [Coco] FHL Color Flex
> 
> > What is the link for the version 5.0:4​​?
> > another thing
> > vcc tried, and if I started but the keyboard will not let me pass the
> > date while entering a number, writes 01234567
> > I tried everything but does not improve
> > CONCLUSION The FLEX version 5.0:2, and 5.0:3 operate at VCC (Coco3)
> > but not the keyboard.
> > will try with another DECB
> > 
> >> From: computerdoc at sc.rr.com
> >> To: coco at maltedmedia.com
> >> Date: Fri, 5 Apr 2013 07:22:53 -0400
> >> Subject: Re: [Coco] FHL Color Flex
> >> 
> >> The FHL Color Flex Complete Manual refers to a 5.0:4 version.  Does
> >> anyone
> >> have this version?
> >> Is there an OCR version of this manual?  Searching this pdf version
> >> is impossible.  Thumbing through all the pages to find a particular
> >> piece of information is the only way to find anything.
> >> Kip
> >> 

Cheers, Gene
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