bradley.grigor@canremote.uucp (BRADLEY GRIGOR) (02/25/90)
mlord@bnr-rsc.UUCP (Mark Lord) writes:
mP>In the course of tracking down another problem, I ran 'strings' on
mP>QEMM.SYS, and, Lo and Behold, it has several undocumented
mP>command-line options.
mP>Does anybody KNOW what these actually do? (My 90-day warranty is up,
mP>so I'm not supposed to bother Quarterdeck with such questions).
mP>Option Abbreviation
mP>----------------------------
mP>IGNOREA20 IA
mP>NOXBDA NXY
mP>VGA VG
mP>NOROM NR
mP>TASKS TA
mP>These are NOT in the documents for my version (v4.23) of QEMM.
mP>Does anybody KNOW what these are for?
Paraphrasing (NOT copying of course!) from the QEMM-386 V5.00
manual:
OPTION ABBR FUNCTION
---------- ---- --------
IGNOREA20 IA disables trapping of the 8042 ports, which
QEMM.SYS does by default to detect programs
that attempt to manipulate the state of the
A20 line in order to access extended memory
and which sometimes causes keyboard
problems. IA disables support of HIMEM.SYS
for example, but may also eliminate certain
keyboard related problems. Besides, with
QEMM-386 loaded, who needs HIMEM.SYS?
NOXBDA NX do not move the eXtended BIOS Data Area. On
machines that have one, the XBDA presents an
obstacle to proper memory management, so
QEMM moves it. However, some software might
become confused to not find the XBDA at the
default 639K address, so NX disables the
relocation. Appropriate on PS/2 model 80.
VGA ??? ???
NOROM NR disables the remapping of the reboot page of
the system ROM, which QEMM normally (but
needlessly) does to detect reboots. Using
NR saves 4KB of memory.
TASKS=n TA=n sets the number of internal data structures
used by QEMM.SYS to handle interrupts out of
protected mode. There are 16 by default,
each of which requires 384 bytes of extended
memory.
bradley.grigor@canremote.uucp : ALEX is coming to Toronto in April.
Newmarket, Ontario, Canada : TelePoker will be there - will YOU?
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