User`s guide
033- How can I get a display of IIgs speed?
You can use SpeedGS. This is a STARTUP program selector for ProDOS-8 on the
Apple IIgs which features display of Boot Volume, Date/Time, and current Speed.
Speed is shown as a rounded multiple of 'Normal'-- i.e. 1MHz. For download
sites, see Csa21MAIN4.txt .