Rossmoller Turboprocess article

From: Sam Laur (
Date: 2001-03-10 07:57:59

There seems to be something about it in GO64! issue 01/99 but
I don't have it (and it's one of the issues missing from GO64!

Anyway, I'll do a full translation of the C=Lehti 1/88 article
later, here are some of the more important (?) points in the 
article, about running the thing.

There are three trimresistors on the thing, one with a red knob
attached to adjust the module speed, and two to adjust 
synchronization to the C64. Note: They say they tested a 
preliminary "first" version of the card - what you have may
be different. 

Speed control: May be controlled via software, via the I/O-port
at address 1; bit 7 on = fast, off = slow. And when the screen
is switched off, bit 6 on will enable the thing to run "as fast
as it can" asynchronously. The speed can also be adjusted
through the 250k trimpot, in the range of 100kHz - 3.2 MHz.

The version of OS they tested had a disk turbo and some other
stuff. Won't support a cassette drive at all. 

The memory is battery backed-up, so that's what the Varta pack
is for. Beware: if you run a packed module game, it'll stick
to the backed-up RAM like chewing gum to hair :-)

And then there's another article from (of course) the gamer's 
viewpoint: lots of compatibility problems...
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