Re: Different Timer-Speed with diff. CPUs!?

Edward Di Geronimo Jr. (edwdig@davinci.bergen.org)
Wed, 18 Sep 1996 10:29:46 -0400 (EDT)

> I'm using a TimerEvent-Message (to be send every second) for getting the
> same speed on every PC.
> But some users (8086-8286-owners) said that the program is too slow while other
> ones (486dx4-, pentium-,...-owners) were complaining about a too-fast-program.

The GEOS timer uses the 2nd timer on the 8253 chip. On some PC's it
generates an interrupt every millisecond. On some it does every other
millisecond. It can be set to either one. My guess is that GEOS is
assuming it's set to 1 millisecond but not ensuring that it is.

Can anyone confirm/deny that?

- -------------------------------------------------------------------
| "You never really understand a person until you consider things |
| from his point of view----until you climb into his skin and |
| walk around in it." |
| -- Atticus Finch, Harper Lee's "To Kill a Mockingbird" |
- -------------------------------------------------------------------
| Edward Di Geronimo Jr. edwdig@bergen.gov |
- -------------------------------------------------------------------