Bios; Rom-Bios Sockets; Standard Bios Rom; Eeprom Memory For Setup - DIGITAL-LOGIC Microspace MSM586SEN Technical User Manual

DIGITAL-LOGIC AG

5 BIOS

More details are available in the separate BIOS manual on our CD and homepage !
5.1

ROM-BIOS sockets

An EPROM socket with 8 Bit wide data access normally contains the board's AT compatible ROM-BIOS.
The socket takes a 29F40 EPROM (or equivalent) device. The board's wait-state control logic automatically
inserts four memory wait states in all CPU accesses to this socket.
The ROM-BIOS sockets occupies the memory area from C0000H through FFFFFh; however, the board's
ASIC logic reserves the entire area from C0000h through FFFFFh for onboard devices, so that this area is
already usable for ROM-DOS and BIOS expansion modules.
Consult the appropriate address map for the MICROSPACE MSM586SEV ROM-BIOS sockets.
5.2

Standard BIOS ROM

Core BIOS device:
VGA BIOS device:
MAP:
5.3

EEPROM Memory for Setup

The EEPROM is used for setup and configuration data, stored as an alternative to the CMOS-RTC. Option-
ally, the EEPROM setup driver may update the CMOS RTC, if the battery is running down and the checksum
error would appear and stop the system. The capacity of the EEPROM is 2 kByte.
Organisation of the 2048Byte EEPROMs:
Address MAP: Function:
0000h CMOS-Setup valid (01=valid)
0001h Reserved
0003h Flag for DLAG-Message (FF=no message)
0010h-007Fh Copy of CMOS-Setup data
0080h-00FFh reserved for AUX-CMOS-Setup
0100h-010Fh Serial-Number
0110h-0113h Production date (year/day/month)
0114h-0117h 1. Service date (year/day/month)
0118h-011Bh 2. Service date (year/day/month)
011Ch-011Fh 3. Service date (year/day/month)
0120h-0122h Booterrors (Autoincremented if any booterror occurs)
0123h-0125h Setup Entries (Autoincremented on every Setup entry)
0126h-0128h Low Battery (Autoincremented everytime the battery is low, EEPROM -> CMOS)
0129h-012Bh Startup (Autoincremented on every poweron start)
0130h Number of 512k SRAM
0131h Number of 512k Flash
0132h/0133h BIOS Version (V1.4 => [0132h]:= 4, [0133h]:=1)
0134h/0135h BOARD Version (V1.5 => [0124h]:=5, [0125h]:=1)
0136h BOARD TYPE ('M'=PC/104, 'E'=Euro, 'W'=MSWS, 'S'=Slot, 'C'=Custom, 'X'= smart-
Core or smartModule)
0137h CPU TYPE:
(01h=ELAN300/310, 02h=ELAN400, 05h=P5, 08h=P3, 09h=Elan520, 10h=P-M).
0200h-03FFh Reserved
0200h-027Fh Reserved
0400h-07FFh Free for Customer's use
29F040
29F010
E0000 - FFFFFh
C0000 - CBFFFh
CC000 - CFFFFh
MSM586SEN/SEV Manual V1.5E
(U111) socket
(U155) soldered
BIOS from INSYDE SOFT 128k
VGA BIOS from Chips & Technology 48k
Reserved
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