Back to home page

DOS ain't dead

Forum index page

Log in | Register

Search:  
Back to the forum
Board view  Mix view

Jemm v5.66 : exception 09 on Intel P4 w/ Ultra IDE BIOS ext. (DOSX)

posted by Japheth Homepage, Germany (South), 07.09.2007, 08:02

> My aunts' HP Pavillion (HP BIOS v3.21 ?, Intel Pentium 4, 2 Ghz, 512 MB
> RAM) doesn't like JEMM at all (my FreeDOS bootdisk #1) except with
> the ultra conservative X=A000-FFFF NOHI NOINVLPG NOVME. Everything
> else I tried resulting in a constant stream of reg dumps immediately after
> loading, even before finished booting (I think ... too fast to read, Pause
> key doesn't work, Ctrl-Alt-Del won't work either). Other computers are
> much more reliable with JEMM (esp. P166 and 486, work fine). I almost want
> to speculate, but I won't. :-P

Jemm has inherited the scan method for free upper memory blocks from FD Emm386. (One addition has been made: it checks for RAM and excludes such regions automatically.) This method is not always sufficient. You can use the GETI15EX tool from HXRT, which displays the reserved regions returned by int 15h, ax=E820h. Usually this gives a good hint what part of the E000-EFFF region is used by the BIOS and hence shouldn't be used. Then exclude this region for Jemm with parameter X=.

---
MS-DOS forever!

Post reply
 

Complete thread:

Back to the forum
Board view  Mix view
22049 Postings in 2034 Threads, 396 registered users, 299 users online (1 registered, 298 guests)
DOS ain't dead | Admin contact
RSS Feed
powered by my little forum