Liam Proven said: > No, you cannot use UMBs on anything less than an 80386. > Emulated or not makes no difference. While he has more DOS experience than me, AFAIR UMBs were memory blocks between 640Kb and 1Mb, part of the real mode address space and could be used in any PC, as long as physical RAM did exist there . They were not in DOS user space, so were not allocated to "normal" user programs, but did not have any other restrictions. Many expanded memory managers map RAM above 1Mb to UMBs when physical UMBs are unavailable.
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