LIM 4.0 Expanded Memory Boards/Drivers for Basic 7.0 (58547)




This article was previously published under Q58547

SUMMARY

Listed below are some memory boards/drivers that are within the specifications of the LIM 4.0 EMS (Lotus-Intel-Microsoft version 4.0 Expanded Memory Specification) standard for MS-DOS. One list below is for 80386 computers, and the other list is for 80286 computers.

This information is useful for owners of Microsoft Basic Professional Development System (PDS) version 7.0 or 7.1 for MS-DOS. The following features in Basic PDS 7.0 and 7.1 can take advantage of LIM 4.0 EMS expanded memory: ISAM file-handling, the QBX.EXE environment, and certain overlaid .EXE programs.

MORE INFORMATION

Below is a list of expanded memory boards and drivers for machines with an 80386 processor chip. (The 80386 is also known as the 386): 
Company        Address / Phone              Memory board / Driver
-------        ---------------              ---------------------

Teleware West  909 Electric Ave.            Above DISC
Inc.           Suite 102
               Seal Beach, CA 90740

Everex         48431 Milmont Dr.            RAM8000 / EMM.SYS
               Fremont, CA 94538
               (800) 821-0806
               (415) 498-1115

Intel          185 Berry                    InBoard 386 AT / Driver
               Suite 306
               San Francisco, CA 94107
               (800) 538-3373
               (408) 765-4512

Microsoft      One Microsoft Way            HIMEM.SYS
               Redmond, WA 98052            EMM386.SYS supplied with
               (800) 426-9400                 MS-DOS 5.0 and Windows
               (206) 882-8088                 3.0 and 3.1.

Orchid         45365 Northport              RamQuest XT / AT
               Loop West
               Fremont, CA 94538
               (415) 683-0300

Qualitas       7101 Wisconsin Ave.          n/a / 386MAX
               Suite 1386
               Bethesda, MD 20814
               (301) 907-6700

Quarterdeck    150 Pico Blvd                n/a / QEMM
               Santa Monica, CA 90405
               (213) 392-9851

Tall Trees     2585 East Bayshore Rd.       JRAM / JEMS
               Palo Alto, CA 94303
               (415) 493-1980

Techmar        6225 Cochran Rd.             MICRORAM 386
               Solan, OH 44139              MICRORAM (PS/2)
               (216) 349-1009

Toshiba        2441 Michelle Dr.            n/a / EMM386.SYS
               Tustin, CA 92680
               (800) 999-4273
               (714) 583-3000
Below is a list of expanded memory boards and drivers for machines with an 80286 processor chip. (The 80286 also known as the 286): 
Company        Address / Phone              Memory board / Driver
-------        ---------------              ---------------------

Teleware West  909 Electric Ave.            Above DISC
Inc.           Suite 102
               Seal Beach, CA 90740
               (714) 545-1181

AST            16215 Alton Parkway          Rampage Plus XT / AT
               Irvine, CA 92718             SixPak 286 XT / AT
               (714) 863-1333

Intel          185 Berry                    Above Board Plus / EMM
               Suite 306                    Above Board Plus 8 / EMM
               San Francisco, CA 94107
               (800) 538-3373
               (408) 765-4512

Microsoft      One Microsoft Way            HIMEM.SYS
               Redmond, WA 98052
               (800) 426-9400
               (206) 882-8088

Orchid         45365 Northport              RamQuest XT / AT
               Loop West
               Fremont, CA 94538
               (415) 683-0300

Qualitas       7101 Wisconsin Ave.          n/a / MOVE'EM
               Suite 1386
               Bethesda, MA 20814
               (301) 907-6700

Quarterdeck    150 Pico Blvd                n/a / QEMM(IBM ONLY)
               Santa Monica, CA 90405       n/a / QEMM 50/60
               (213) 392-9851

Tall Trees     2585 East Bayshore Rd.       JRAM / JEMS
               Palo Alto, CA 94303
               (415) 493-1980

Techmar        6225 Cochran Rd.             MICRORAM
               Solan, OH 44139              CAPTAIN 286
               (216) 349-1009

Toshiba        2441 Michelle Dr.            n/a / EMM.SYS
               Tustin, CA 92680
               (800) 999-4273
               (714) 583-3000

REFERENCES

The MS-DOS interrupts necessary to access LIM 4.0 expanded memory are documented in the following book:

"MS-DOS Extensions: Programmer's Quick Reference," Ray Duncan. Pages 25-68. Microsoft Press, 1989.
Modification Type: Minor Last Reviewed: 1/8/2003
Keywords: KB58547
©2002 Microsoft Corporation. All rights reserved.