🚀 go-pugleaf

>Rainbow EchoMail Digest                         Oct 28, 1990
>From:     DAVID MAROUN
>
>Unaided MS-DOS recognizes 655 000 characters of that.

	This is a white lie.  MS-DOS on a IBM-PC only recognizes 640K
of memory, but MS-DOS on the Rainbow will recognize up to 896K.  The
rest of the memory on clones is reserved for hardware access to cards.

>From:     GEORGE THEALL
>
>DM>Now the question is:  Will utilities that allow use of extended memory
>DM>on other machines work on Rainbows?
>
>   David, please note that "extended" memory in the area of PC
>compatibles has a rather specific meaning - memory whose addresses lie
>above 1024KB (ie, 1MB) - and as such requires a 286 or better. As I
>don't believe the memory board from SS requires a 286, I doubt it
>contains so-called extended memory.

	No, it doesn't contain extended memory.  No, it doesn't need a
286 to work.  The card from SS (RAMbow?)  Uses 1Meg chips and just
throws away the extra (as near as I can tell).

	I seem to recall[%] that expanded memory uses interrupts to
map different parts of the extra memory into a "page" that was part of
the 1Meg address space of the 8088.  As such, I've seen a program that
were supposed to allow you to setup a virtual area of memory that
really lived on disk.  I've never tried to run this on my Rainbow, so
I don't know if the program will work.  This program was posted to
comp.binaries.ibm.pc a while back.

Warner
---
% From reading a book from The Waite Group, so I don't know how
reliable the information is.  I never do quite trust the information
in Waite Group books.  Their C++ book had so many obvious bugs in
their examples that I stopped reading it after a couple of chapters.
--
Warner Losh		imp@Solbourne.COM
How does someone declare moral bankruptcy?