DIGITAL-LOGIC AG

MSB900/L Detailed Technical Manual V1.0

CMOS Map

Location

Description

 

 

00h

Time of day (seconds) specified in BCD

 

 

01h

Alarm (seconds) specified in BCD

 

 

02h

Time of day (minutes) specified in BCD

 

 

03h

Alarm (minutes) specified in BCD

 

 

04h

Time of day (hours) specified in BCD

 

 

05h

Alarm (hours) specified in BCD

 

 

06h

Day of week specified in BCD

 

 

07h

Day of month specified in BCD

 

 

08h

Month specified in BCD

 

 

09h

Year specified in BCD

 

 

0Ah

Status Register A

 

Bit 7

=

Update in progress

 

Bits 6-4

=

Time based frequency divider

 

Bits 3-0

=

Rate selection bits that define the periodic

 

 

 

interrupt rate and output frequency.

 

 

0Bh

Status Register B

 

Bit 7

=

Run/Halt

 

 

0

Run

 

 

1

Halt

 

Bit 6

=

Periodic Timer

 

 

0

Disable

 

 

1

Enable

 

Bit 5

=

Alarm Interrupt

 

 

0

Disable

 

 

1

Enable

 

Bit 4

=

Update Ended Interrupt

 

 

0

Disable

 

 

1

Enable

 

Bit 3

=

Square Wave Interrupt

 

 

0

Disable

 

 

1

Enable

 

Bit 2

=

Calendar Format

 

 

0

BCD

 

 

1

Binary

 

Bit 1

=

Time Format

 

 

0

12-Hour

 

 

1

24-Hour

 

Bit 0

=

Daylight Savings Time

 

 

0

Disable

 

 

1

Enable

 

 

0Ch

Status Register C

 

Bit 7

=

Interrupt Flag

 

Bit 6

=

Periodic Interrupt Flag

 

Bit 5

=

Alarm Interrupt Flag

 

Bit 4

=

Update Interrupt Flag

 

Bits 3-0

=

Reserved

 

 

0Dh

Status Register D

 

Bit 7

=

Real Time Clock

 

 

0

Lost Power

 

 

1

Power

 

 

 

 

Continued...

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Compaq MSB900L user manual Cmos 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.