Re: basic1-patch from vice in a real PET

From: Francesco Messineo <francesco.messineo_at_gmail.com>
Date: Thu, 8 Feb 2018 21:06:07 +0100
Message-ID: <CAESs-_x9iFWQX42ZTnKYktjgnL-6DYzD37FXWo06SAvP4U-pGA@mail.gmail.com>
On Thu, Feb 8, 2018 at 9:00 PM, vossi <vossi@ceffy.de> wrote:
> I have to take a 2532 and activate it if BA11=low or (BA11=High and BA4,5,6 =
> low) (no PIA/VIA accessed).
> I have space for the additional code in E800 to E80F, E900 to E90F and so on
> - thats enough for the 64 bytes from Andre!

Look at the schematic. There should be a signal called X8XX (I don't
remeber if active low or high) and there should also be /SELE,
so you would just need to place your ROM where /SELE is asserted and
X8XX is not.
Anyway, I would not place any ROM where it was not intended to be, I
would use the option ranges from 9000, A000 etc.
But I know, we like to hack...


Frank

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Received on 2018-02-08 21:00:03

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