Re: 6702 chip

From: Rhialto <>
Date: Fri, 22 Feb 2013 12:16:07 +0100
Message-ID: <>
On Fri 22 Feb 2013 at 02:31:14 +0100, Pavel Zima wrote:
> Hello.
> I've drawn layers of 6702 based on die shot published on visual6502.

Great to see continuing activity on this front!

On the software side I also have something to report. I had posed about
the 6702 on my livejournal, including the source code for the emulation
and the C version of the dongle checker. A "mr_z" posted a reply that he
had discovered that the multiplication done in the dongle checker
doesn't really have a special relation with the hardware. It is used
merely as a convenient pseudo-random number generator. And indeed, if
you replace that bit in the C code with real random numbers (as long as
they're odd), the check still passes.

___ Olaf 'Rhialto' Seibert  -- The Doctor: No, 'eureka' is Greek for
\X/ rhialto/at/    -- 'this bath is too hot.'

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Received on 2013-02-22 12:00:03

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