Re: MMU prototyping

From: Mia Magnusson <mia_at_plea.se>
Date: Tue, 22 May 2018 14:08:39 +0200
Message-ID: <20180522140839.000042c6@plea.se>
Den Tue, 22 May 2018 13:20:44 +0200 skrev Michał Pleban
<lists@michau.name>:
> Hello!
> 
> smf wrote:
> 
> > A cartridge that adds c64 compatibility to the ultimax (with a
> > passthru) would be awesome, but I also think it might be
> > impossible :D
> 
> I don't think it should be so hard. You will have to do most of the
> memory decoding yourself, but a CPLD should be able to handle it.
> Otherwise it's just a matter of adding another CIA, 62 kB of memory
> and some clever way to capture writes to the I/O port in order to
> change the memory layout.

Is it possible to map out the internal I/O decode (and char rom?) on an
UltiMAX?

Otherwise it would probably work with most but not all software.

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Received on 2018-05-22 15:01:00

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