Re: A few questions!

[mharris@hops.cs.jhu.edu (Matthew S. Harris)]

Henrik 'Ratte' Gudat (GUDATH@EZINFO.VMSMAIL.ETHZ.CH) wrote:
: In <01bc849f$25aa1020$1f7192cf@system1> "Dan writes:

: > I just picked up another //gs.  It included a very small card in slot 4. 
: > It says on it "Lego 9767" and "FOR EDUCATIONAL USE".  It has a Rockwell
: > 6522 chip on it, a 74LS74 and a 74LS245, and a ribbon cable.  The 6522
: > sounds familiar, but I can't recall what it is.  Serial?  Parallel?  

: Lego once made a kit for combining Lego elements with home computers. I believe
: these kits existed for C-64 (?), Apple II and PCs. I have never seen one but
: this is the only thing that makes sense to me.

I used one of those kits for the Apple II a long time ago.  That
sounds like the interface card from it.  I don't remember seeing the
actual card, but I do remember that it connected with a ribbon cable.
I'm pretty sure there was a version for the Commodore 64, but I don't
know for sure.

The 6522 is a "versatile interface adapter", basically a fancy
peripheral interface.  It sounded familiar to me, too, so I checked
the C64 schematics.  The C64 doesn't use it, but the 1541 and 1571
disk drives each use two.


Matthew Harris
mharris@cs.jhu.edu