C65 boot-up sequence

From: Marko Mäkelä <msmakela_at_gmail.com>
Date: Mon, 5 Dec 2011 21:49:24 +0200
Message-ID: <20111205194924.GA2830@x60s>
On Mon, Dec 05, 2011 at 04:18:07PM +0100, silverdr@wfmh.org.pl wrote:
>>>Doesn't the C65 boot up in 64 mode? If I remember the documentation 
>>>correctly, the KERNAL would do some VIC-III "register knocking" to 
>>>switch to the C65 mode.
>Since I don't have one, I find it hard to verify but from what I saw on 
>youtube, it boots into "native mode" and can be brought into C64 mode 
>in at least one way similar to C128: by issuing the GO64 command.

I have never seen a C65 either, but I seem to remember from the manual 
that I read in 1996 that the hardware boots up in 64 mode. The KERNAL 
would switch it to the "native" mode by writing some magic to the 
VIC-III registers. This was supposedly in order to improve compatibility 
with cartridges and the like.


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Received on 2011-12-05 20:00:09

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