ErgoPro e-, x- and s- Series PC Specialist's Handbook
Page 44 First Edition, Release 4 - June 1998
BIOS
The system BIOS is always shadowed. The system and video BIOS (if system is provided with on-board video
controller) are stored in a Flash RAM, thus the BIOS is field upgradable with a floppy.
At boot-up a short copyright message is displayed indicating the BIOS version and unit ID (machine identifier).
ROM BIOS #53 Version Y.YY
(c) Copyright International Computers Limited 1993
The IDs are divided as follows:
PC-type Unit ID
e450/75, e451/651 (AC41659) 54
s450/133n, s650/133 (AC41655),
x251/451/651 (AC41658/687, with audio)
53
x451/166s, x651/166s (AC41682),
x251/451/651 (AC41681/689, w/o audio)
57
Shadow option proms
The video BIOS and ROMs on add-on boards can be shadowed, if shadowing is supported by the add-on board.
Shadowing ROMs on option boards gives better performance. Shadowing is done using the SETUP utility. The
"Shadow option PROMs" parameter displays (when enable is selected) a list indicating whether the board in
question can be shadowed in the following way:
Yes XAPI support, will be shadowed
No XAPI support, can not be shadowed
- No XAPI support, shadowed at your option
XAPI is short for ICL's proprietary eXtended APplication Interface.
BIOS modules
In the Resident Setup Utility (RSU), there is a menu called ADMIN/MODULE, which is used to handle the
addresses of the BIOS modules, and in some cases to exclude the module. When activating the SELECT
MODULE menu, the following table is shown.
Name Date Category # POST Discard Writable Size Segment Excl.
xrsCfg 1994-11-5 Setup 0 - Yes Always 04A0H 0000H No
HRA10IIb 19994-18 Video 0 Early No POST 0800H C000H No
SysOvl1 1995-1-20 System 1 Early No Never 0400H E400H No
Name & date: Name of the module and date when it has been written or updated.
Distrib: Handles the unpacking and shadowing of the BIOS modules. Does not reserve
memory.
xrsCfg: Includes the User config menu, Does not reserve memory.
xrsSec: Includes the User Security menu. Does not reserve memory.
xrsPower: Includes the User Power menu. Does not reserve memory.
Prodtest: Used for factory testing. Does not reserve memory.
MACH64CT: Onboard Video BIOS
AMDLAN: Remote boot Bios for Ethernet module
AMDSCSI: SCSI Bios for SCSI module
SysOvl1 : Chip set initialisation 1. This module is removed from the memory before loading
of the operating system.
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