Re: "Partner 128" by Timeworks Inc.

From: groepaz_at_gmx.net
Date: Mon, 03 Oct 2022 19:26:43 +0200
Message-ID: <2130300.ucGe3eQFbh_at_rakete>
Am Montag, 3. Oktober 2022, 02:58:17 CEST schrieb Segher Boessenkool:
> On Sun, Oct 02, 2022 at 07:57:09PM +0200, groepaz_at_gmx.net wrote:
> > Its really kindof weird. The cartridge has a circuit to listen to the
> > address bus. The button "arms" the circuit and issues a NMI, and when
> > there is $fffa it forces $de on the databus.
> 
> For only the fffa access or also the fffb one (and everything until the
> disarm I guess)?  So it then is executing code from IO1?

I couldnt figure out exactly how it does it, but its indeed forcing it long 
enough so the NMI vector turns into $dede, and that is indeed where it starts 
executing the freezer code

-- 

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<_shock>
Received on 2022-10-03 20:00:11

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