[comp.sys.ibm.pc] Magitronic XT mainboards + their magic 384K

rreiner@yunexus.YorkU.CA (Richard Reiner) (10/03/90)

Some XT mainboards from Magitronic are populated with 1Mb of RAM;
640Kb is in the 8086 address space, and the rest is not.  The only way
to use the other 384Kb is as a ramdisk, using a device driver (cdisk.sys)
supplied with the boards.  However, I'd like to use it as EMS.

Magitronic does not document how to get at the top 384Kb, and I don't
much feel like dissassembling their device driver.  Does anyone have
an EMS driver for these boards, or at least some documentation on the
port addresses (or whatever) one uses to get at that 384Kb?

Thanks.