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[tikbalang]

i'd like to correct myself a bit (although i have not experimented enough to verify this).

msdos622 can have xms3 support if an xms3 driver is used. the himem.sys that came with it only support xms2, so the likely candidates are himem.sys from msdos71 or pcdos71, himemx/jemmex by japheth, or xmgr by jrellis.

*pcdos71 supports fat32 and is available from ibm website as part of its "IBM ServerGuide Scripting Toolkit, DOS Edition, version 1.3.07". it came after pcdos2000 (pcdos7 rev1).