Changing the amount of conventional memory
Many DOS and Windows programs require conventional memory to run. At the same time, many device drivers and TSR (Terminate and Stay Resident) programs may be loaded into conventional memory. If you find that you do not have enough conventional memory to run some of your DOS or Windows programs, take the following steps.
To increase Upper Memory Block (UMB) space to 122K instead of 64K, add the following line to your CONFIG.SYS file:
DEVICE=C:\WINDOWS\EMM386.EXE
To load DOS into the UMB (also known as high memory), also add the following to your CONFIG.SYS file:
DOS=HIGH, UMB
Insert the LOADHIGH (LH) command before all TSRs and device drivers in the AUTOEXEC.BAT file. For example:
LH C:\DOS\SMARTDRV.EXE /X
This will load these programs into UMB. If you run out of UMB space, you may see an error message like this during the startup (boot) process:
Run time error R6009
In this case, remove LH from TSRs and device drivers one or two at a time, and try again until the error message does not appear.
If you issue a DOSCLIP copy command while using Harvard Graphics 3.0, the PC environment crashes when you quit Harvard Graphics. To prevent this, use the steps outlined above, making sure that SMARTDRV is one of the drivers preceded with LH.
IMPORTANT To prevent the system BIOS from becoming damaged when the PC environment is configured for 2 MB of memory, set the switch in the CONFIG.SYS file to turn memory testing off:
DEVICE=C:\DOS\HIMEM.SYS /TESTMEM:OFF
