Re: Anyone have any info on the PEDISK II floppy controller?

From: Mike Naberezny <>
Date: Wed, 03 Jul 2013 13:50:42 -0700
Message-ID: <>
Hi Ethan,

On 7/1/13 1:06 PM, Ethan Dicks wrote:
> If you want some help with reverse-engineering the schematic, I
> could probably help there.  Your bare-board pics are excellent for
> that!

If you would like to work on it, your help would be welcome.  I plan to draw 
the schematic but it may be some time before I get to it.

I reassembled the board and the computer no longer crashes.  When it is 
activated with SYS 59904, the ROM displays the banner and attempts to boot the 
disk.  I have a disk but it is in poor condition.  I have not been able to try 
it yet because I need to repair the cables first.

Lee Davison did an initial disassembly of the ROM that is now linked from my 
page.  I have been working on it also.  The ROM contains code to read/write 
sectors and possibly the LOAD command.  The remaining functions are in RAM.


Mike Naberezny (

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Received on 2013-07-03 21:00:10

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