[OT] GEM, Blitter, and Atari ST (was: RE: Debian and SqueakL revisited again)
Andy Stoffel
Andrew.Stoffel at jenzabar.net
Thu Nov 1 16:07:50 UTC 2001
> I recently got an Atari ST emulator running on my laptop and
> noticed something curious...there was a menu option on the
> desktop called "Blitter" which IIRC sped up the graphics display.
> I wonder if anyone here knows if this has any relationship to BitBlt?
This feature is much newer than the programming related hardware/etc
documentation I have (from 1986/87) on that machine but in the owners
manual for MegaSTe (from 1990)
[ Ahh... for the days when an owner's manual had things like IO port
pinouts.....]
it says:
"BLiTTER
The BLiTTER co-processor chip in the MEGA STe computer
greatly improves the speed of text and graphic displays."
[etc.]
There are Atari web sites you can search if you really want to know this
stuff...
and in fact, you can find information to answer your question here:
http://www.atari-st.lovely.net/atari-st-docs/hardware/BLITTER.TXT
which says, in part,
"The Atari ST Bit-Block Transfer Processor (BLiTTER) is a hardware imple-
mentation of the bit-block transfer (BitBlt) algorithm. "
etc. including a reference to Smalltalk.
Hope this helps :-).
-Andy-
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