Thanks, now was with 613K of Convetional Memory Free... and with DOS
VPC's Guest Additions.

----- Original Message -----
From: "Japheth" <[EMAIL PROTECTED]>
To: <freedos-user@lists.sourceforge.net>
Sent: Saturday, December 29, 2007 4:17 AM
Subject: Re: [Freedos-user] Freedos x Virtual PC x Jemm



> Hi,
> 
>> You should have mentioned something 
about the context
>> instead of only throwing URLs at us ;-).
The first  URL
>> talks about making more low RAM free by
loading  things
>> high into UMB and by using fewer drivers.
The  second
>> URL talks about DR DOS. One thing that might be 
useful
>> for FreeDOS and JEMM is the EMM386 hint in the 
first:
>> It says you might be able to use:
>> 
>>  EMM386 ... I=B100-B7FF I=C600-C7FF I=CC00-CFFF I=e600-efff
>>  
>> In other words, the Virtual PC VGA BIOS is only
24k
>  
> it is 48 kB (C000-CBFF), but has holes. Using
I=TEST finds most of them  
> automatically, except the 4 kB
region C700-C7FF (because it has a  different 
> "last
byte").
> 
> OTOH, region CC00 seems to be  not
really free on VPC 2007, it contains a 2 kB 
> ROM. Jemm somehow
has  the opinion that this region is free, however, I don't 
>
know why. To be  safe, it should be excluded with X=CC00-CCFF.
>

> > and the mono  text mode buffer can be partially
used
> > for UMBs  (b100-b7ff).
> 
> My
experience tells that the buffer can be fully  used (B000-B7FF)
>

> > Unfortunately it does not tell  which
> > things are in the way at e000-e5ff and c800-cbff, do 
you
> > know more about that?
> 
> Tool
GetI15Ex (hxrt)  displays:
> 
> Int 15h, eax=E820h:
> addr 000000000, size  00009FC00, type 1 (available)
> addr
00009FC00, size 000000400, type 2  (reserved)
> addr 0000E0000,
size 000020000, type 2 (reserved)
>  addr 000100000, size
001EF0000, type 1 (available)
> addr 001FF0000, size  00000F000,
type 3 (ACPI)
> addr 001FFF000, size 000001000, type 4  (ACPI)
> 
> which tells that region E000-EFFF is NOT free. Examining
 it with DEBUG 
> confirms this.
> 
> So a
"good" Jemm line for  VPC 2007 might be:
> 
>
DEVICE=JemmEx.exe NOINVLPG NOVME FASTBOOT  I=TEST I=B000-B7FF I=C700-C7FF

> X=CC00-CCFF
> 
> It will  then install an EMS
frame buffer in D000-DFFF. If EMS is not needed, 
>  the NOEMS
will add 64 kB UMB.
> 
> What should be mentioned with 
VPC's Guest Additions: the binary VMADD386.SYS 
> must be loaded
before  Jemm in CONFIG.SYS and FSHARE.EXE is a buggy DOS TSR.
>

> 
> 
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