I have a toshiba t1200 with an 8086 processor @ 9.54 MHz and 1 Mb (built-in) ram running dos 6.22 and windows 3.0 , 20 MB hard drive (Drivespaced) and a 720kb 3.5" floppy drive.

Dos only uses the first 640 kb of the ram and the rest could be used as a hard-ram disk.
When I select "hard-ram size 0 kb" in bios setup I should be able to use the rest of the ram as LIM-EMS, but it doesn't work.
How can I install and use the EMS?

How much ram do you have?

Post back contents of config.sys.

"Dos only uses the first 640 kb of the ram and the rest could be used as a hard-ram disk."

"""EMM386.EXE is a device driver for 80386 and higher systems with XMS memory"""

Maybe a better understanding of MS-DOS 6.xx memory management would help ?

http://support.microsoft.com/kb/95555

http://www.windowsitlibrary.com/Con...

This makes interesting reading:-

http://www.old-computers.com/museum...

Note the term expanded memory.
Early pc's had additional memory on expansion cards (as opposed to *extended* on mobo). For this I seem to recall a different driver was used.

Good Luck - Keep us posted.

I used to use the AST cards for added memory on 8088's. Of course it's been awhile since I've used any of that. Off the top of my head I thought he could just use emm386 but I see that's not allowed. The ems management may be in bios setup but I'm not familiar with what that looks like on that laptop. He might also need a driver from toshiba.

I have 1 M of built in memory. 640 kb is used as convectional memory and the rest I should be able to use either as a ram-disk or EMS.

The config.sys is written by me and contains no memmory handling routines.

I have run the bios setup and selected "Hard-ram size 0 kb". That would meen I can use the rest as EMS. I also selected "Build in expanded memory port 258H" (the default).
I have checked the site
http://209.167.114.38/support/downl...
but I havn't found any driver.

I REALLY need the EMS because I am running Windows and I sometimes get "Out of memory" messages.

***SOLVED***

I found an old device driver, emm.sys, on one of the floppies that I used for backing up the hard disk before upgrading from dos 4.01 to 6.22

Thanks for your help anyway!

You have no luck about your need as your PC runs a 8086 processor that means a native address space of no more than 1 MB with just 640 KB of conventional memory.

Probably you have a built-in expansion card holding 256 KB of EMS memory and a shadow RAM of 128 KB reserved for bios mapping into core storage. To resume

640K + 256K EMS + 128 K Shadow = 1 MB memory

What stated is based on my own knowledge of legacy systems based on 8086/80286 processors.

To access EMS you need Toshiba specif model driver as hard EMS can't be accessed by any other way. EMM386 emulates EMS by XMS (memory above 1MB) in 386 and higher processors.

Even if you can acces EMS that is of little help for memory shortage as expanded memory is block addressable and not suited to direct code execution.

Dear Mr 3d

Now you have found the driver, when you have it working, suggest you research:-

a) 'load high' usage in config.sys and autoexec.bat

b) mem manager in dos 6.22

Note:

Running (b) may well use/install (a) where required.

The memory driver may have to be the first loaded. If used previously, see original config.sys etc.

Good Luck - Keep us posted.