DOS 5.0>>AST RAMpage card

[HENRY KISOR (SYSOP)]

   Having successfully installed DOS 5.0 on my Toshiba T-1200XE, I'm
now having a little trouble with it on my Zenith Z-248 with RAMpage
card. I can't get DOS 5.0 to load part of itself into high memory.
   All the memory on the RAMpage card (1024K) is expanded memory. I
tried using REX.SYS to change part of the expanded memory into
extended memory, but DOS 5.0 doesn't recognize that extended memory
and won't load part of itself into high memory.
   The alternative, of course, is to throw the hardware switches on
the RAMpage card to allocate 64K of its memory as extended memory. But
has anyone out there successfully used *software* switches with a
RAMpage card to load DOS 5.0 into high memory?