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From: neals@tekigm2.UUCP (Neal Sedell)
Newsgroups: net.micro.6809
Subject: Re: coco II & J&M disk contoller
Message-ID: <743@tekigm2.UUCP>
Date: Fri, 13-Jun-86 15:55:49 EDT
Article-I.D.: tekigm2.743
Posted: Fri Jun 13 15:55:49 1986
Date-Received: Tue, 17-Jun-86 20:13:37 EDT
References: <998@ihlpl.UUCP>
Distribution: net
Organization: Tektronix, Vancouver WA
Lines: 38
Summary: xxx

In article <998@ihlpl.UUCP>, saba@ihlpl.UUCP (Sabalaskey) writes:
> I'm having trouble formatting a disk under OS-9 for my coco II.
> I would appreciate any help. Also, does anyone know of an easy way
> to change the disk device driver to get 40 tracks & double sided
> support??? 
> 
> 
> My story continues .....
> 
> I just got my disk drives for my coco II. I have two Teac 40 track,
> double density, double sided drives, and the new J&M controller
> (switchable DOS) with both JDOS and RSDOS. I also have the OS-9
> version 1 (1.01.00 I think). If if format a disk using DSKINI0
> or DSKINI1 from JDOS or RSDOS basic, it works just fine.
> 
> However, when I use OS-9 format command, the drive steps through
> formatting but seems to barf when it writes the system info. I get
> error #245 (write error) every time. I tried numerous diskettes.
> . . . . .

Well, this is quite interesting.  This sounded just like the problem the
COCO/OS-9 user at my friendly local RS store was having.  I just called
him up and it turns out that he has just the opposite problem, using OS-9
everything is OK but RS-DOS won't format!  He has two CDC DS/DD 40T drives.
Luckily for him, he can format under OS-9 and then wipe out the RS-DOS
directory sectors and use the disk.  Going the other way would be a real
pain....  I would think.  Is there a floppy controller expert in the house?
I built my own from the RS schematic using a slightly different WD 279x chip
and it worked, intermittently :-(  I finally gave up and bought a HD Special-
ties controller and haven't had a single problem since.

			Good luck!

			Neal "finally got my 02.00.00 OS-9" Sedell


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