Re: Disabling memory refresh in UltiMax mode Re: 6510 handling of $00 and $01 registers

From: Gerrit Heitsch <*gerrit_at_laosinh.s.bawue.de*> Date: Sun, 11 Dec 2011 09:27:58 +0100 Message-ID: <4EE4698E.40704@laosinh.s.bawue.de> · gerrit_at_laosinh.s.bawue.de

On 12/11/2011 03:33 AM, Segher Boessenkool wrote:
>>> You could just switch the monitor to greyscale :-P
>>
>> That takes out the color effects that are part of the demo.
>
> I thought your goal was to identify a 6569R1 this way.

Well, that you can do  if you want. But since it can also be done by 
software, there is no reason anymore.

>> Back then the CIAs were also labled 6526R4. MOS dropped the 'R4'
>> later. Gives you an idea how long it took to get those working. :)
>
> Not terribly long IMO. They shipped earlier revisions than that.

Those must have had some kind of bug though, or why would MOS start a 
new revision? The oldest CIA I have so far is a 6526R4 with a 2383 datecode.

  Gerrit

       Message was sent through the cbm-hackers mailing list