From: Niklas Ramsberg (niklas.ramsberg_at_swipnet.se)
Date: 2002-06-16 17:11:59
Marko Mäkelä <marko.makela@hut.fi> wrote on 2002-06-16 16:37:22:
>
>The images are now also available at
>http://www.funet.fi/pub/cbm/vic20/roms/tools/16k/. I optimized the
>scans with jpegtran, but that didn't make them much smaller.
Thanks! It's nice to finally be able to contribute something to the
Commodore community after only downloading stuff for a few years.
I'm sorry about the size of the scans, but I didn't want to
compromise on the quality. If I had chosen a lower resolution, the
text would have become almost unreadable.
>According to the PCB scan, the cartridge has six 2114 chips, which
makes
>me suspect that it has a built-in 3-kilobyte RAM expansion.
When I plug it in to my VIC, it says "3071 Bytes free" just like it
should do according to the manual. Wouldn't it show more free memory
if there was a 3k expansion in there? Or do you think part of the
program is copied from the ROMs into RAM?
>Alternatively, you could try remap the 16k expansion from BLK1+BLK2
to
>BLK3+BLK5, but you'd still need to plug in both the 16k expansion
and
>the 3k expansion simultaneously, or the program won't work.
I've thought about that, but I don't think it's worth the trouble. I
think I'll go for Ruud's or Adam Bergström's internal 32K expansion
instead (or wait for your cartridge to become available).
To MagerValp: I have already read your article, but I don't like the
idea of putting a soldering iron directly onto the VIC's chips.
I do live in Gothenburg (Mölndal to be precise). I'll ask Tema
Elektronik what they have.
/Niklas
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