[Coco] Reading/Writing Model I/III/4 Disks on a CoCo

[Al Hartman]

As far as I know, Model III and 4 disks are 40 tracks. A 35 Track Coco drive 
can't make those. I don't know of any software to make Model I/III/4 disks 
on a Coco from images.

Your best bet is to ask Ira Goldklang (http://www.trs-80.com/) to make you 
boot floppies, which he will for a small donation.

I can make you disks also. I got from Ira, Model 4 CP/M (Montezuma Micro), 
MultiDOS Model III/4, and the the Model III/A disk. I may have a few other 
Model III/4 disks, I'll check in the morning. I would need $1.00 per disk 
(that's what I paid for them) plus postage.

When I get more organized, I'll have more things available. I just bought a 
Model 4D a few weeks ago. I have to find all my TRS-80 Software which is up 
on a high shelf right now. I'm not able to get it down myself due to an 
injury. I'm waiting for a friend to come by and help me organize everything.

- Al -


-----Original Message----- 
From: Mark J. Blair
Sent: Thursday, September 05, 2013 12:46 AM
To: CoCoList
Subject: [Coco] Reading/Writing Model I/III/4 Disks on a CoCo

I have a TRS-80 model 4p on the way from eBay, so now I'm trying to figure 
out how to bootstrap floppy images onto disks for it. I have not yet found 
something comparable to DriveWire for the CoCo or ADTpro for the Apple. So, 
this has me wondering whether I might be able to use my CoCo to create disks 
for the 4p from downloaded images, since that's the only thing I have at the 
moment that reads and writes 5.25" MFM diskettes. Don't anybody go and 
remind me about my little KryoFlux boondoggle just now. :)

So far, I haven't found much documentation about the low-level formats of 
the various model I/III/4 operating systems. Do any of y'all know whether 
any of those formats are compatible with the CoCo's disk controller and 
firmware? For example, would DSKI$/DSKO$ be able to read and write raw 
sectors on a TRSDOS 6.x floppy? I understand that the stock model 4p drives 
should be single-sided, but I'm not sure yet whether the default TRSDOS 6.x 
and LS-DOS 6.3 formats confine themselves to 35 tracks.

Has there been any prior work done towards reading/writing model I/III/4 
disks on the CoCo or vice versa?


-- 
Mark J. Blair, NF6X <nf6x at nf6x.net>
http://www.nf6x.net/


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