Re: New three versions of C64 source code

From: Spiro Trikaliotis <ml-cbmhackers_at_trikaliotis.net>
Date: Sat, 13 Dec 2014 21:07:15 +0100
Message-ID: <20141213200715.GC1853@hermes.local.trikaliotis.net>
Hello Kajtár,

* On Sat, Dec 13, 2014 at 03:53:46PM +0100 Kajtár Zsolt wrote:
 
> Could you create a branch from the 1571 sources and apply some patches based
> on your disassemblies until it'll match the 1571CR ROM? If it's CA65 only
> it's no problem. Creating a plain 1571 source for CA65 might be a worthwhile
> intermediate step.

My work in progress is already available online:

   http://cbmrom.trikaliotis.net/

The "ugly" 1571CR changes can be found after $88F0 (cf.
http://cbmrom.trikaliotis.net/full/floppyrom.a65.full.html, lines
2371...). Beginning at $89B3 (lines 2526...), it becomes apparent that
most differences are because the WD1772 and the 5710 have to be
programmed very differently.

And: No, I have not done these changes with the linker that I spoke
about in the other mail yet. I have done some tests, and I know it is
working, but much is still missing. I hope I will be able to come back
to this in the not-so-far future.

I started this work with the C64/VIC20 sources, though.

Regards,
Spiro.

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

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Received on 2014-12-13 21:00:03

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