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 21:04:07 +0100 Message-ID: <4EE50CB7.1070408@laosinh.s.bawue.de> · gerrit_at_laosinh.s.bawue.de

On 12/11/2011 08:28 PM, Spiro Trikaliotis wrote:
> Hello Gerrit,
>
> * On Sat, Dec 10, 2011 at 09:14:03PM +0100 Gerrit Heitsch wrote:
>> On 12/10/2011 08:51 PM, Segher Boessenkool wrote:
>
>> I don't plan on using the 6569R1 regularly. But it's nice to have a
>> really old C64 (includes real PLA and -02 Kernal ROM) handy when
>> checking software compatibility. The RAM test I use crashes on the
>> -02 ROM, plug in a -03 ROM and it works.
>
> Why does it crash on a -02 ROM? I mean, the differences between -02 and
> -03 are very small.

I asked myself the same thing but didn't see a reason to investigate in 
detail yet. The problem was reproducable though.

> Is the RAM test available somewhere?

Yes. It was posted on the forum64.de web site in 2008 with the notice it 
being freeware.

  Gerrit

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