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Panasonic CF-51, USB Devices in Real-Mode (Announce)

posted by Brian_extended(R), 05.09.2016, 14:19

A follow-up, and solved an old mystery for me.

Most of the computers used over (almost) 20 years: DOS 7.1 (Win95B, win98,win98se) booted into realmode have no problem handling more than 64MBytes of memory. The Panasonic CF-50- loaded with 1GByte, no problem using all memory with Phar Lap extenders.

The CF-51: I had to load HIMEM.SYS to use memory above 64MBytes. Maybe Phoenix BIOS reverted back to an older version of DPMI when implementing native USB support?

HIMEM.SYS and Phar Lap "get along", so my image processing code is working again on the CF-51.


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