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MSB900/L Detailed Technical Manual V1.0

CMOS Map continued...

 

 

 

 

 

 

 

 

 

 

Location

Description

 

 

 

 

 

 

 

 

 

33h

Base Memory Installed

 

 

 

 

Bit 7

= Flag for Memory Size

 

 

 

 

0

=

640kB

 

 

 

 

1

=

512kB

 

 

 

Bits 6-0

= Reserved

 

 

 

34h

Minor CPU Revision

 

 

 

 

 

 

 

 

Differentiates CPUs within a CPU type (i.e., 486SX vs 486 DX,

 

 

 

vs 486 DX/2). This is crucial for correctly determining CPU input

 

 

 

clock frequency. During a power-on reset, Reg DL holds minor

 

 

 

CPU revision.

 

 

 

 

35h

Major CPU Revision

 

 

 

 

 

 

 

 

Differentiates between different CPUs (i.e., 386, 486, Pentium).

 

 

 

This is crucial for correctly determining CPU input clock fre-

 

 

 

quency. During a power-on reset, Reg DH holds major CPU

 

 

 

revision.

 

 

 

 

 

 

 

 

 

 

 

36h

Hotkey Usage

 

 

 

 

 

Bits 7-6

= Reserved

 

 

 

 

Bit 5

= Semaphore for Completed POST

 

 

 

Bit 4

= Semaphore for 0 Volt POST (not currently used)

 

 

 

Bit 3

= Semaphore for already in SCU menu

 

 

 

Bit 2

= Semaphore for already in PM menu

 

 

 

Bit 1

= Semaphore for SCU menu call pending

 

 

 

Bit 0

= Semaphore for PM menu call pending

 

 

40h-7Fh

Definitions for these locations vary depending on the chipset.

 

 

 

 

 

 

 

 

5.8.EEPROM saved CMOS Setup

The EEPROM has different functions, as listed below:

•Backup of the CMOS-Setup values.

•Storing system information (i.e., version, production date, customization of the board, CPU type).

•Storing user/application values.

The EEPROM will be updated automatically after exiting the BIOS setup menu. The system will operate also without any CMOS battery. While booting, the CMOS is automatically updated with the EEPROM values.

Press the Esc-key while powering on the system before the video shows the BIOS message and the CMOS will not be updated.

This would be helpful, if wrong parameters are stored in the EEPROM and the setup of the BIOS does not start.

If the system hangs or a problem appears, the following steps must be performed:

1.Reset the CMOS-Setup (disconnect the battery for at least 10 minutes).

2.Press Esc until the system starts up.

3.Enter the BIOS Setup:

a)load DEFAULT values

b)enter the settings for the environment

c)exit the setup

4.Restart the system.

The user may access the EEPROM through the INT15 special functions. Refer to that chapter in the GEODE LX800-LX900 manual on the Product CD.

The system information is read-only and uses the SFI functions. Refer to the GEODE LX800-LX900 manual.

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Image 34
Compaq MSB900L user manual Eeprom saved Cmos Setup, Bits = Reserved 34h Minor CPU Revision
Page 33 Page 35

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.
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