Q35662: "Out of Memory" in MS-DOS 4.00, OK in MS-DOS 3.x; 30K Impact

Article: Q35662
Product(s): See article
Version(s): 4.00 4.00b 4.50
Operating System(s): MS-DOS
Keyword(s): ENDUSER | B_BasicCom | mspl13_basic
Last Modified: 16-DEC-1989

MS-DOS Versions 4.00 and later take 30K or more memory than MS-DOS
Versions 3.x. As a result, a memory-intensive application that
successfully compiled and executed under MS-DOS Versions 3.x may fail
to run under MS-DOS Version 4.00.

You can check if the problem is caused by memory limitations by adding
a SETMEM(-30000) to the beginning of the program and running under
MS-DOS Versions 3.x. If the program runs out of memory with this test,
it may fail with MS-DOS Version 4.00.

This information applies to Microsoft QuickBASIC Versions 4.00 4.00b
and 4.50 for MS-DOS, to Microsoft BASIC Compiler Versions 6.00 and
6.00b for MS-DOS and MS OS/2, and to Microsoft BASIC PDS Version 7.00
for MS-DOS and MS OS/2.

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