plim@hpsgpa.HP.COM (Peter Lim) (11/30/89)
I have two questions on QEMM-386 and 80387.
I noticed that QEMM-386 seems to have problem with the way some program
initialize the 80387. More specifically when I run SST.EXE (a benchmark
program) after booting with QEMM.SYS, an exception #0013 was detected
when SST tried to look for the 80387. The BIOS (I think it is the BIOS)
catch the error and offer the option to Continue, Terminate or Reboot.
Choosing to continue hangs the machine. Similar problem also happens
when I run ISPICE, but this program just abort and drop back to DOS
with no other consequence. Actually, for ISPICE, the error is something
to do with Stack Frame being not in the same segment (at least this is
what the Intel micro-processor handbook says). Well, I suppose QEMM-386
is not totally to blame for this, because all the other programs work well.
So, what did these two programs do wrong ? Anyone ???
I also heard about CMOS 80387. Lately, there's an advertisement at the
end of the latest BYTE magazine (I think it is the PC-Special issue)
which advertised a C387 for about US$40 more than 80387 of the same
clock rate. So, I presumed it can't be very much better than the Intel's
80387, right ? Anyway, today on this note group, somebody said there were
rumor that the CMOS 80387 actually runs about 10 times faster than Intel's.
Any truth in this ? I would be very interested if it will just run 3 times
as fast !
Dying to find out the answers .........
Regards,
Peter Lim.
HP Singapore IC Design Center.
E-mail address: plim@hpsgwg.HP.COM
Snail Mail address: Peter Lim
Hewlett Packard Singapore,
(ICDS, ICS)
1150, Depot Road,
Singapore 0410.
Telephone: (065)-279-2289