4M expanded memory cards

From: Steve Thatcher <melamy_at_earthlink.net>
Date: Thu Mar 20 15:53:00 2003

actually history wise, there was a memory specification called
LIM (Lotus/Intel/Microsoft) that used a 16K/32K/64K memory slot
in the 1 meg real memory region where the 8088 could access it
to bank switch blocks of memory in and out of the window area.
Lotus 123 was a big user of the Expanded Memory because of the
typical size of spreadsheets would quickly eat up normal memory
and require disk access that would slow down the spreadsheet
even more. Memory boards that were referred to as extended memory
were the ones that could be accessed by 286 and above processors
by having the processor go into protected mode.

best regards, Steve Thatcher

>--- Original Message ---
>From: Ethan Dicks <erd_6502_at_yahoo.com>
>To: cctalk_at_classiccmp.org
>Date: 3/20/03 11:15:43 AM
>
--- TeoZ <teoz_at_neo.rr.com> wrote:
>> I remember paying close to $400 for 4 x 4mb 30 pin sims for
my 386/40
>> homebuilt machine so it would scream using windows 3.0.
>> Funny how memory prices have gone to hell over the last few
years.
>
>As someone already pointed out - prices only drop drastically
per meg for
>new technologies. For old memory, the price drops slowly, then
it rises
>a bit once it's old enough to be legacy. Try and find some
largish 30-pin
>memory now - it's not the $25-$40/meg it once was, but some
places still
>get a lot for it (not that they *sell* a lot ;-)
>
>> What was the point of the ISA memory addon boards, people
running
>> windows/286 and OS/2 1.x/2.x?
>
>Yes, that and productivity apps that needed more space than
640K
>(spreadsheets, CAD packages, etc.) plus games. There were plenty
>of DOS games that needed more than ~500K.
>
>-ethan
Received on Thu Mar 20 2003 - 15:53:00 GMT