Re: Alternate Display Mode?

[tsetse@trance.helix.net (tsetse)]

David Empson (dempson@atlantis.actrix.gen.nz) wrote:
: In article <3o4pdd$98h@gap.cco.caltech.edu>,
: Nathan Mates <nathan@cco.caltech.edu> wrote:
: > 
: >    That's where the Alt Display Mode comes from. It sets up a
: > background task to copy the page to the memory where it's displayed
: > from so it looks right. If you must view this display area, it's a

: One point that you didn't mention: the above only applies with the
: original IIgs (ROM 1).  The 1MB motherboard (ROM 3) has hardware
: support for shadowing text page 2, which is usually turned off.  On
: the ROM 3, turning on Alternate Display Mode simply changes the
: hardware shadowing bit, and there is no speed penalty.

turning on alt display mode (at least on a rom 1) is also a subtle way to 
slow the computer down a bit while playing games (if you like cheating 
that way.)

--
It is not possible that the possible and the   |    tsetse@helix.net
impossible are both possible  - Babble 123     |  +oO      Vancouver.CA