Computer (EPC) Index
EXM - EXpansion Module
EPC-26A / 27 Manuals
Inserting an EPC into an EXM
Note: Make sure that
power to your system is off. The EPC-26A / 27 is not
designed to be inserted or removed from a live system.
Notice: Use of any of
the files or information on this page is
AT YOUR OWN RISK. If you want
a guarantee on this stuff, seek out any repair / service
company that supports EXM / EPC devices.
If you have any files or experience with these devices, please reach to
27 CPU (-26A 486DX2-50, -27 486DX4-100
Enhanced, Pico Power chipset)
Optional Flash/SRAM Memory
H2 Reserved for future use.
H3 Use to enable writing to flash
H4 Do not use
H5 Forces a hosted re-flash of the BIOS.
Must jumper H3 also.
The EPC-26A/27 can have 128 KB of SRAM and 2 or 4 MB of
flash installed on it. The EPC Flash/SRAM is compatible with
the EXM-2A architecture and it appears to software as though
there was an integrated EXM-2A in the system.
Note: Software cannot
distinguish EPC Flash/SRAM from a separate EXM-2A card using
the same configuration. A system cannot enable both the
optional Flash/SRAM and an EXM-2A expansion module at the
Note that the XFORMAT program used to format flash memory is
also distributed with the EXM-2 and EXM-2A expansion
modules. Any references to the EXM-2 and/or EXM-2A are
intended to denote your flash memory.
Refer to the XFORMAT Software User’s Manual for more
information about formatting SRAM and flash memory.
FLASH and SRAM
Formatting the FLASH memory and creating a
bootable drive will take over as the C:, this prevents any
DE drive from working. Look in the EXM-2A files for XFORMAT
XFORMAT.EXE Flash formatting program
SRAMDISK.SYS SRAM device driver
Boot block files for DOS 5.0
Boot block files for DOS 6.0, 6.1, &
Booting From Flash Memory Conflicts
with IDE Drive
If you plan to boot from a non-IDE device, such as the
resident Flash memory, set the master drive as None and use
the BIOS extension. You cannot boot from Flash and
still have an IDE drive; the IDE drive must be drive
C: if it is to be used. Flash BIOS extensions are enabled
and configured in the Advanced Menu.
To use an EXM-HD or EXM-MX series mass storage unit, you
must configure a master adapter;
EPC-26A / 27 Memory Amounts
0MB Flash Memory, 4MB, 8MB, 16MB or 32MB SIMM, max 32MB.
2MB Flash Memory, 4MB, 8MB, 16MB or 32MB SIMM, max 32MB.
4MB Flash Memory, 4MB, 8MB, 16MB or 32MB SIMM, max 32MB.
Note: The Flash and SRAM
memory may be formatted, and each may act as a drive. The
Flash may be made bootable, but that prevents any IDE drive
from being C: To enable FlashROM to be used as a drive, go
to the Advanced menu.
To the best of my knowledge, Flash or SRAM can't be added to
the total memory.
Floppy Types Supported
360K, 720K, 1.2 MB, 1.44MB, and 2.88 MB. BUT... If you look
at the EMC-FDM, it appears to have a max 500Kbit/s transfer
rate, which suggests to me that it tops out at 1.44MB
Setup Please refer to Chapter 2, BIOS
Diskette can be internal EMC-FDM or external EXM -9 or -16.
EPC-26A / 27 supports 360K, 720K, 1.2 MB, and 2.88 MB.
EMC-FDM has a 16MHz oscillator, and tops out with 1.44MB.
Main > IDE Adapter Submenu
There appears to be issues with some levels of BIOS and
Main > Boot Sequence Submenu
Main > Numlock (Keyboard
Main > Advanced Menu
Integrated Peripherals Sub-Menu
- Configures COM ports on EPC CPU module.
Memory Shadow Copy
ROM into RAM
Large Disk Access Mode:
> 528 MB, [DOS] - DOS, [Other] - other operating
Built-in BIOS Extension
Configuration Enables Flash memory to
appear as a drive.
Main > Advanced > Integrated Peripherals Submenu
Configure COM ports on EPC CPU module.
Main > Advanced > Memory
Main > EXM Menu
Each EXM module has an ID, Option Byte 1 (OB1):/ Option Byte
Empty slots should show FF 00 00 indicating that
no EXM is present
The ID / OB1 / OB2 information is in Chapter 2 of each EXM's
Note: The system does
NOT populate these values!
You must enter them manually...
Main > Exit Menu