Some users have reported display problems with the Apple IIGS and the RGB
monitor. Some packages mentioned included Wizardry, Chuck Yeager's Flight
Simulator, Reader Rabbit, and Bismark.
The problems sometimes occur only with text, and sometimes show up as
"bleeding" on the video display.
Programs that are written to run on non-RGB systems do not concern
themselves with where, or how, the display is generated -- in other words,
"video is video" for non-RGB systems.
With RGB video, there are other constraints, and many programs do not
adhere to them, even if they are modified to run on the Apple IIGS. Many
times the package reads "Runs on the GS in IIe emulation mode", which
indicates the video will be normal for composite monitors and NOT optimized
for RGB.
This usually indicates that it should be run with the system speed at
Normal--not at Fast.
(Wizardry was written for the Apple IIe a number of years ago; Chuck
Yeager's Flight Simulator is recent but still written for the Apple IIe --
and is not optimized for RGB.)
When a program is written for use on the Apple IIGS, it is usually
optimized for RGB, which looks fine when displayed on composite monitors.