The following is a copy of my CONFIG.SYS file. I managed to squeeze 637088 bytes (622.2K) out of MS-DOS 5.0 using Quarterdeck's QEMM-386 Memory Manager ver. 5.13. The system running this setup is a 386DX-25 with 4 Meg. of RAM, using AMI Bios and the C&T Chipset. No memory resident software is loaded through the AUTOEXEC.BAT file and it has therefore not been included. So far I have not encountered any problems with this configuration and all my software including Windows 3.0 works great. If you would like some help in getting the most out of your PC, please give me a call. I run a company called CMS Consulting, and we offer many services including: System Setup Software Sales & Installations Hardware Sales & Service Custom Software Development Training Courses and Much More... Feel free to contact me: Mike Sigmundt CMS Consulting 4 Carnwath Cres. Willowdale, Ont. Canada, M2P 1J5 (416) 730-1277 rem ========================================================================= rem === CONFIG.SYS file using QEMM-386 and MS-DOS 5.0 - by CMS Consulting === rem ========================================================================= rem === Install EMS and XMS memory manager and fill hi-memory with RAM DEVICE=c:\qemm\QEMM386.SYS RAM NR DMA=64 HANDLES=32 NOVIDEOFILL NOSORT rem === Screen driver for VGA (supports 132 column mode, ANSI.SYS does not) DEVICE=c:\qemm\loadhi.sys /r:1 c:\dos\vga\VANSI.SYS rem === DOS Version Program for Programs NOT Compatible with DOS 5.0 DEVICE=c:\qemm\loadhi.sys /r:1 c:\dos\SETVER.EXE rem === Hard Drive Cache Program, using 1 Meg. normally, only 256K in Windows DEVICE=c:\qemm\loadhi.sys /r:1 c:\dos\SMARTDRV.SYS 1024 256 rem === Install a 256K RAM disk, /E puts it into extended memory DEVICE=c:\qemm\loadhi.sys /r:1 c:\dos\RAMDRIVE.SYS 256 128 64 /E rem === Install Logitech ScanMan driver for PC Paintbrush IV + DEVICE=c:\qemm\loadhi.sys /r:1 c:\dos\scanner\LOGITECH.SYS /C3 /D /H280 /W rem === Install Microsoft Mouse driver DEVICE=c:\qemm\loadhi.sys /r:2 c:\dos\mouse\MOUSE.SYS /Y rem === Instructs DOS 5.0 to Load itself into High Memory (no UMB with QEMM386) DOS=HIGH rem === Enables control-c checking BREAK=ON rem === Specify last DOS drive LASTDRIVE=E rem === Specify no DOS stacks STACKS=0,0 rem === Allocate only 10 Buffers since SMARTDRIVE.SYS is being used BUFFERS=10 rem === Allow 60 DOS files handles, load 52 into hi-memory, 8 is DOS minimum FILES=8 INSTALL=c:\qemm\loadhi.com /tsr /r:3 c:\qemm\FILES.COM +52 rem === Install DOS command line editor INSTALL=c:\qemm\loadhi.com /tsr /r:2 c:\dos\DOSKEY.COM /INSERT rem === Install ATI VGA Screen Saver for 15 Minutes INSTALL=c:\qemm\loadhi.com /tsr /r:2 c:\dos\vga\VCONFIG.EXE SAVE 15 rem === Install print formfeed routine (CTRL-F to send formfeed) INSTALL=c:\qemm\loadhi.com /tsr /r:1 c:\extras\PFF.COM rem === Install QDisk Directory Pop-up Program (ALT-TAB to Activate) INSTALL=c:\qemm\loadhi.com /tsr /r:2 c:\extras\QDISK.COM rem === Where DOS finds command.com, /E increases environment variable space SHELL=c:\dos\COMMAND.COM C:\DOS\ /P /E:512 =============================================================================== Following is a dump of the MEM /C command included with MS-DOS 5.0: Conventional Memory : Name Size in Decimal Size in Hex ------------- --------------------- ------------- MSDOS 11120 ( 10.9K) 2B70 QEMM386 2416 ( 2.4K) 970 LOADHI 160 ( 0.2K) A0 LOADHI 160 ( 0.2K) A0 LOADHI 160 ( 0.2K) A0 LOADHI 208 ( 0.2K) D0 LOADHI 160 ( 0.2K) A0 LOADHI 160 ( 0.2K) A0 LOADHI 96 ( 0.1K) 60 LOADHI 96 ( 0.1K) 60 LOADHI 96 ( 0.1K) 60 LOADHI 96 ( 0.1K) 60 LOADHI 96 ( 0.1K) 60 COMMAND 2880 ( 2.8K) B40 FREE 96 ( 0.1K) 60 FREE 64 ( 0.1K) 40 FREE 636928 (622.0K) 9B800 Total FREE : 637088 (622.2K) Total bytes available to programs : 637088 (622.2K) Largest executable program size : 636496 (621.6K) 3620864 bytes total EMS memory 1654784 bytes free EMS memory 3145728 bytes total contiguous extended memory 0 bytes available contiguous extended memory 1654784 bytes available XMS memory MS-DOS resident in High Memory Area