From: Marko Mäkelä (marko.makela_at_hut.fi)
Date: 2002-06-16 16:37:22
Niklas Ramsberg wrote:
> I've never done this before, and none of my VICs are equipped to do
> it (no reset switch, etc.), but as it turned out, the cart had a
> monitor called TIM built in, so it was just a matter of finding out
> what addresses the ROMs were mapped to and then saving them to .prg
> files from inside the monitor. Said and done. To my surprise, it
> worked! :)
I remember a machine language monitor for the C64 that would not let its
own code to be accessed. Also, I remember a tape copying program that
would refuse to copy itself. In other words, you were lucky.
> I've tried loading them in Vice 1.9 with full memory
> expansion, and they work just fine.
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.
> A related topic: I only have a 16k and a 3k expansion, which sadly
> means that I can't use these files with expanded memory. Does anyone
> have a 32k memory expansion to sell (or trade)?
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.
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.
Marko
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