Ultimax questions

From: Michał Pleban <lists_at_michau.name>
Date: Sun, 13 Oct 2013 14:15:12 +0200
Message-ID: <525A8ED0.2050402@michau.name>

I have obtained an Ultimax from Japan recently. Upon unpacking, I
noticed that its keyboard features "Shift Lock" and "Restore" keys.

I was wondering how they are supposed to work? The Shift Lock key is
just a normal membrane key and does not have any "locking" mechanism, so
some custom electronics would be required to make it work. But I don't
see any on the schematics. Similarly, I don't see any NMI line coming
from the keyboard so how can the "Restore" key work? Maybe they are both
just fakes?

There is a MAX BASIC cartridge with the machine. Is there any ROM dump
of it? Is it the same BASIC as in C64 / VIC-20, or was it modified
further (apart, of course, from the memory management stuff)?


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Received on 2013-10-13 13:00:08

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