DIGITAL-LOGIC AG

MSB900/L Detailed Technical Manual V1.0

5.8.1.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.

Organization 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

Boot errors (Auto incremented if any boot error occurs)

0123h-0125h

Setup Entries (Auto incremented on every Setup entry)

0126h-0128h

Low Battery (Auto incremented every time the battery is low, EEPROM -> CMOS)

0129h-012Bh

Startup (Auto incremented on every power-on start)

0130h

Reserved

0131h

Reserved

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 use

5.9.Memory & I/O Map

5.9.1.System Memory Map

The X86 CPU, used as a central processing unit on the MICROSPACE, has a memory address space which is defined by 32 address bits. Therefore, it can address 1 GByte of memory. The memory address MAP is as follows:

CPU GEODE

Address:

Size:

Function / Comments:

 

 

 

000000 - 09FFFFh

640 kBytes

Onboard DRAM for DOS applications

0A0000 - 0BFFFFh

128 kBytes

CGA, EGA, LCD Video RAM 128kB

0C0000 - 0C7FFFh

32 kBytes

VGA BIOS

0C8000 - 0CFFFFh

32 kBytes

Free for user

0D0000 - 0DFFFFh

64 kBytes

Free for user

0E0000 - 0EBFFFh

32 kBytes

Bios

0EC000 - 0EFFFFh

16 kBytes

BIOS extensions

0F0000 - 0FFFFFh

64 kBytes

Core BIOS

100000 - 1FFFFFFh

31 MBytes

DRAM for extended onboard memory

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Compaq MSB900L user manual Memory & I/O Map, Eeprom Memory for Setup, System Memory Map

MSB900, MSB900L specifications

The Compaq MSB900 and MSB900L are noteworthy entries in the realm of personal computing, particularly for their cutting-edge features and innovative technologies that defined their era. Positioned as versatile desktop solutions, both models have garnered attention for their robust performance and user-friendly design.

The Compaq MSB900 is equipped with a powerful processor that enhances multitasking efficiency. Its architecture supports a range of demanding applications, making it suitable for both professional and everyday use. Users can expect a seamless experience whether working on complex spreadsheets or engaging in casual gaming.

In terms of memory, the MSB900 boasts expandable RAM options, allowing users to enhance their system's capabilities as needed. The availability of multiple RAM slots provides flexibility for upgrades, ensuring the system can keep pace with future software requirements. Storage solutions in the MSB900 include high-speed hard drives, which contribute to fast boot times and robust data retrieval.

The MSB900L variant steps up the performance with additional features tailored for power users. It incorporates advanced graphics capabilities, offering superior visual experiences for gaming and multimedia applications. The dedicated graphics card provides a substantial boost in rendering performance, making it a worthy choice for graphic designers and video editors.

One of the standout characteristics of the MSB900 and MSB900L is their commitment to connectivity. Both models come equipped with a wide array of ports, ensuring compatibility with various peripherals. This includes USB ports for modern devices, Ethernet ports for wired networking, and legacy connections for older technology, catering to a diverse user base.

Energy efficiency is another key feature of these models. Designed with power-saving technologies, the Compaq MSB900 and MSB900L aim to reduce energy consumption without compromising performance. This focus not only helps to lower operating costs but also aligns with growing consumer preferences for environmentally conscious products.

In summary, the Compaq MSB900 and MSB900L offer a compelling combination of performance, expandability, and connectivity. Their innovative features and user-friendly design make them suitable for a wide range of users, from casual consumers to professional power users. As a testament to Compaq’s legacy, these models continue to be regarded as reliable choices in the personal computing landscape.