Re: Detect a C128 from C64 mode

From: Spiro Trikaliotis <*ml-cbmhackers_at_trikaliotis.net*> Date: Thu, 23 May 2013 20:08:12 +0200 Message-ID: <20130523180812.GB9312@trikaliotis.com> · ml-cbmhackers_at_trikaliotis.net

Hello Greg,

* On Thu, May 23, 2013 at 10:17:23AM -0400 Greg King wrote:

> >Unfortunately, I don't think any of these work; they all set
> >the test-mode bit (bit 1) to 1 (on)?
> 
> Does that matter?  The original test bit (in $d016) crashed the
> system because it disabled the dynamic RAM refresh (therefore, it
> was removed).

You mean: There are chip revisions where the test bit actually does
something? On my 6569 (datecode from early 1983), it was a no-op.

Regards,
Spiro

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