Message-ID: <01FD6EC775C6D4119CDF0090273F74A4021E69@emwatent02.meters.com.au>
From: "Da Silva, Joe" <Joe DOT DaSilva AT emailmetering DOT com>
To: "'opendos AT delorie DOT com'" <opendos AT delorie DOT com>
Subject: RE: Fonts & VCPI (was BASIC & EMS, nee Optimizing CONFIG.SYS...)
Date: Wed, 6 Dec 2000 17:28:50 +1100 
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Reply-To: opendos AT delorie DOT com

Don't worry folks, this message isn't yet more on the EMS/XMS debate ...
;-)

See below ...

Joe.

> -----Original Message-----
> From:	Patrick Moran [SMTP:pmoran22 AT yahoo DOT com]
> Sent:	Wednesday, 6 December 2000 8:44
> To:	opendos AT delorie DOT com
> Subject:	Re: BASIC & EMS (was: Optimizing CONFIG.SYS...)
> 
	----- snip -----

> with the two 16 bit program pointers. I hate having to use text to do
> this.
>  HTML is so much better.
> 
> Well I tried, and this piece of crap OE is just that a piece of crap and
> it
> fif what I expected. It looks great untin I save it. Then I looked at it
> again before I sebt it. I could not make heads or tails of the diagram I
> originally typed into the message. So I went to DOS and did it in a REAL
> text editor. I'll now try and import the text file. The last time I did
> that, the stupid piece of crap OE made FOUR copies of it! What a piece of
> crap, the only editor I have ever worked with that was a worse piece of
> crap
> was EDLIN! If it does not work, I'll just leave it the way it comes out so
> everyone can see what a piece of crap OE is and attach a small text file
> that works right.
> 
> 
> 
> 
>                       15                Offset               0
>                        |-------------------------------------|
>                        |             Base Pointer            |
>                        |------------------|------------------|
>                        |                  |                  |
>                        |                  |      Appended    |
>        15              |                  |  0<----zeros---->|
>         |---------------------------------|------------------|
>         |    Segment Register             |  | 0 | 0 | 0 | 0 |
>         |---------------------------------|------------------|
>        19                      ^          |         ^        0
>         |                      |          |         |        |
>         |                      |----|-----|---------|        |
>         |                           |     |                  |
>         |                           |     |                  |
>         |                        |--|-----|-----|            |
>         |                        |     Adder    |            |
>         |                        |------|-------|            |
>         |                               |                    |
>         |                               |                    |
>        19                               |                    0
>         |-------------------------------|--------------------|
>         |                  A19-A0  Address bits              |
>         |----------------------------------------------------|
>                               20 bit address
> 
> 
> 
> 
> 
> 
> The lower 4 bits of the Segment register is hardwaied to zeros inside the
> chip. the adder is where we need to look to see how the quirks occur. If
> you
> look at the above diagram, (probably won't come out worth a crap using
> text)
> 
	[da Silva, Joe]  

	OK, I'll simply assume that Outlook Express uses the same
	fonts as Outlook ... in which case the above diagram is displayed
	correctly if you choose any of the following fonts :

	- Courier
	- Fixedsys
	- Terminal

	----- snip -----

> > These allowed programs to access extended memory "behind the back" of
> > DOS.  Two standards developed for accessing protected mode:
> >
> > * VCPI (the Virtual Control Program Interface)
> > * DPMI (the DOS Protected Mode Interface)
> >
> > Because the latter had the marketing clout of MS behind it , it has
> > become the more common standard.  It is used by MS Windows, among other
> > programs.
> 
> Yes just like everything else Gates does he made it incompatible with
> Quaterdeck's VCPI which was developed first. BTW If you look at memory
> with
> a good memory program, it will show that DRDOS also uses VCPI. I have not
> checked to see if it is there without DPMI turned on, but as I understand
> it
> 
	[da Silva, Joe]  

	Yes, VCPI is definitely provided by DR-DOS's EMM386 when DPMI
	is turned off (that's the way I configure it ... for various
reasons).

	----- snip -----