Article View: net.micro.6809
Article #703Re: coco II & J&M disk contoller
From: Neal Sedell
Date: Fri, 13 Jun 1986 19:55
Date: Fri, 13 Jun 1986 19:55
38 lines
2420 bytes
2420 bytes
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
--
{zehntel | uw-beaver | reed | hp-pcd | hplabs | decvax}!tektronix!tekigm!neals
Technical Details
Message-ID:
<743@tekigm2.UUCP>Path:
arc1-ca.pugleaf.net!utzoo!watmath!clyde!burl!ulysses!bellcore!decvax!tektronix!tekig5!tekigm!tekigm2!nealsReferences:
<998@ihlpl.UUCP>Show Full Headers
Complete Article Headers
Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.3 (USS@Tek, v1.1) based on 4.3bsd-beta 6/6/85; site tekigm2.UUCP Path: arc1-ca.pugleaf.net!utzoo!watmath!clyde!burl!ulysses!bellcore!decvax!tektronix!tekig5!tekigm!tekigm2!neals 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