Re: 1541 ROMs

From: Spiro Trikaliotis <ml-cbmhackers_at_trikaliotis.net>
Date: Sat, 13 Dec 2014 21:19:00 +0100
Message-ID: <20141213201900.GE1853@hermes.local.trikaliotis.net>
Hello,

* On Wed, Dec 10, 2014 at 05:56:46AM +0000 William Levak wrote:
 
> 901229-04 is unknown. 901229-05 changes some of the serial bus routines,

Which changes do you mean? Having a quick glance into my sources
(http://cbmrom.trikaliotis.net/), I only find the patches at $FF10 and
$FF20.

Or have I overlooked something more important?

 
> 251968-03 is substantially different, even in the $C000-DFFF region.

It is not so much different as one might think if you only look at the
bytes. It moves around some of the patches, which makes it appear as if
there were more differences.

For example, it adds a copyright notice at $C000 (cf.
http://cbmrom.trikaliotis.net/listings/1541-ii-03.lst, search for
00C002), which moves the patch routines that start at $C002 with
previous ROMs to higher locations ($C04E).

Regards,
Spiro.

-- 
Spiro R. Trikaliotis
http://www.trikaliotis.net/

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Received on 2014-12-13 21:01:23

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