I'm attempting to run MenuetOS on a Dell Latitude XP 475D with a 75 MHZ processor, 40 mb Ext memory, and 37 mb XMS memory. Everything runs smoothly until I hit escape at "All set - press ESC to start." At this point, I see "Unmasking all IRQs" and the computer just hangs there. Any help would be appreciated. I'm rather new to anything but Windows.

I had the same problem when I booted from my HD into DOS, allowing all my TSR's to load. If you're trying to run menuet from your HD (as I did, no floppies :p) try booting _only_ DOS (Shift F5 / F8 -> MSDOS only).
That worked for me

Hello, I use Win98 and it has DOS that handles large hard drives.
WinME does also.
F7/F8 (DOS in a box) isn't the same as straight DOS.

I made a batch file that
IF EXIST AUTOEXEC.DOS GOTO DOS
WIN:
;write your Win code here
GOTO END
DOS:
ATTRIB -S -H -R +A MSDOS.SYS
so I could
REN MSDOS.SYS MSDOS.WIN
REN MSDOS.DOS MSDOS.SYS
ATTRIB +S +H +R MSDOS.SYS
REN AUTOEXEC.BAT AUTOEXEC.WIN
REN CONFIG.SYS CONFIG.WIN
REN CONFIG.DOS CONFIG.SYS
REN AUTOEXEC.DOS AUTOEXEC.BAT
:END

ok once you have made a DOS system file set from your Win files
the SOS.BAT Swaps your Opperateing System boot files for you.

I hope that helps some one some how.

Bitdog

http://bitdog.home.att.net/temp/swapos.zip

Menuet kernel wouldn't be even able to boot from Windows, because it reloads CR0 and CR3 which can't be accessed in V86 mode.
There's a problem somewhere in MenuetOS code (I think in SYS32.INC). Using TSSes for switching to/from interrupts is very slow (same speed as switching to another task). I wrote some debugging code that sends data to COM1 and IRQ0 isn't even started.