Re: D9060 with OpenCBM (was: Mac Installation with Brew)

From: Anders Carlsson <>
Date: Fri, 18 Aug 2017 01:02:53 -0700 (PDT)
Message-ID: <>
Ethan Dicks wrote
> it's probably possible to bump the number of tracks up to 254 by altering
> the ROM code, but I don't recall if anyone has done that).

On July 2, 2006 in a reply to me on this list, you mentioned that earlier on
someone had tracked down the location of the drive geometry table and
patched it in order to use around 16 MB from a ST-225. However I haven't
found any such ROM files floating around.

(The hunt for the golden drive geometry seems to have been going on since at
least 1999)

Also Markus Mehring once mentioned to the Secret Weapons of Commodore that
in Germany there were upgraded drives meaning a 9060 could have anything
from 2x5 MB to 2x16 MB capacity. I understand the SASI board accepts two
drives (probably half height?) and interleaves them in directory listings.

Possibly all those tricks nowadays are mostly for curiosity, and even on the
IEEE side there are more reliable and cost effective ways if storage
capacity is what you are after.

Best regards

Anders Carlsson

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