[Coco] Dumping a JDOS 1.11 ROM

[Bob Devries]

Hi Mark,

I use the utility WIMGTOOL from the MESS package. It is fairly easy to use.

There are a number of other ways, including Toolshed.

Regards, Bob Devries
Dalby, QLD, Australia

----- Original Message ----- 
From: "Mark J. Blair" <nf6x at nf6x.net>
To: "CoCoList" <coco at maltedmedia.com>
Sent: Monday, October 07, 2013 11:05 AM
Subject: [Coco] Dumping a JDOS 1.11 ROM


> I've noticed that my J&M controller came with a version 1.11 JDOS ROM, but 
> that particular version isn't in the repository. So, I figured I should 
> dump it to make sure it gets preserved.
>
> The EPROM is a Motorola MCM68764C. I tried dumping it in my Data I/O 212, 
> but it gives me a "Pin 23 error 75" error, or something like that.
>
> So, my next idea was to dump it in place on my CoCo. Wired doesn't seem to 
> like JDOS, as it gave me a syntax error when I ran the loader program. So, 
> I tried saving the ROM contents under JDOS with:
>
>  SAVEM "JDOS111",&HC000,&HDFFF,&HC000
>
> Then I changed over to the FD-501 controller and used Wired to transfer 
> the image of the floppy I saved onto over to my Mac.
>
> Now I have a .DSK image of a a floppy with the SAVEM'd ROM image on it... 
> but I don't know how to (easily) get the file off of the .DSK image so I 
> can further massage it into a raw binary and an Intel hex file.
>
> So before I go writing yet more code to decipher a DECB-formatted .DSK 
> image, is there a utility already out there that will do what I need? I 
> normally use a Mac so I would prefer UNIX-ish utilities, but I can also 
> run WinXP in a virtual machine.
>
> -- 
> Mark J. Blair, NF6X <nf6x at nf6x.net>
> http://www.nf6x.net/
>
>
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