Re: MAX Machine PLA equations (correct this time)

From: Michał Pleban <*lists_at_michau.name*> Date: Mon, 05 Sep 2016 12:47:23 +0200 Message-ID: <57CD4D3B.1020905@michau.name> · lists_at_michau.name

Hello!

smf wrote:

> A 4066 in an ultimax? The c64 is supposed to (badly) emulate an ultimax,
> not the other way round :-)

The Ultimax already has a 4066 (for switching between the paddles and
SID) and the C64 emulates it in this regard :-)

> What is different about the PLA equations you wrote and the ones you
> dumped?

The ones I dumped are partially incorrect. At least, the GAL programmed
with these equations did not work properly (the MultiMAX cartridge
displayed RAM test error). I think the PLA did not read correctly in my
EPROM burner - sometimes reading the chip several times would yield
different results, etc. Maybe the PLA is too slow for the burner which
expects a faster EPROM. Later I will dig my old Willem burner which
allows setting arbitrarily fast (or slow) chip reading, and will try to
read it again.

Regards,
Michau.

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