Specifications

EPC-5A Hardware & Software Reference Manual
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Large Disk Access Mode
If a hard disk larger than 528MB is being used, this selection should be set to “DOS”
if running MS-DOS, or set to “Other” if using a different operating system. When set
to “DOS”, this selection causes the System BIOS to perform cylinder/head translation
if the drive is configured in Setup to have more than 1024 cylinders. The default is
“DOS”.
User BIOS Extensions
These items control the loading (shadowing) of BIOS extensions contained in the
FBD main block #3. Note that there are actually three groups of Setup items to
control the shadowing of up to three BIOS extensions. The screen graphic only shows
the first group.
Two extensions ship with the EPC-5A. The PicoFlash BIOS offset is 48000h, and the
size is 2000h. The vRom BIOS offset is 4A000h, and the size is 4000h.
BIOS Extension Offset in FBD
This option selects the source address of the BIOS extension located in the FBD. The
address is an offset from the base of the FBD. The offset range is between 46000h
through 5FFFFh in 8KB increments. The default is “Disabled”.
Destination Address
This option selects the target address of the BIOS extension which can range from
C0000h through DFFFFh in 8KB increments. The default is “C8000h”.
BIOS Extension Size
This option selects the number of bytes to copy from the FBD into shadow memory.
BIOS extension sizes can be selected in 8KB increments from 2000h through 10000h.
The default is “2000h”.