Compaq MSB900L user manual Disable Password

Page 33

DIGITAL-LOGIC AG

MSB900/L Detailed Technical Manual V1.0

CMOS Map continued...

Location

 

Description

 

 

 

 

 

 

 

 

 

 

 

 

Byte 3

 

 

 

 

22h

 

Bits 7-6

= Reserved

 

 

 

 

 

 

 

 

Bits 5-0

= Upper 6 bits of Write Precompensation

 

 

Byte 4

 

 

 

 

23h

 

Bits 7-0

= Number of Heads

 

 

 

 

 

 

Byte 5

 

 

 

 

24h

 

Bits 7-0

= Sectors Per Track

 

 

 

 

25h - 2Ah

 

Custom Drive Table 1

 

 

 

 

These 6 Bytes (48 bits) contain the following data:

 

 

Cylinders

 

10bits

range 0-1023

 

 

Landing Zone

 

10bits

range 0-1023

 

 

Write Precompensation

10bits

range 0-1023

 

 

Heads

 

 

8bits

range 0-15

 

 

Sectors/Track

 

8bits

range 0-254

 

 

 

 

 

 

 

 

 

Byte 0

 

 

 

 

25h

 

Bits 7-0

= Lower 8 bits of Cylinders

 

 

 

 

 

 

 

 

 

 

 

 

 

Byte 1

 

 

 

 

26h

 

Bits 7-2

= Lower 6 bits of Landing Zone

 

 

 

 

Bits 1-0

= Upper 2 bits of Cylinders

 

 

 

 

 

 

 

 

 

 

Byte 2

 

 

 

 

27h

 

Bits 7-4

= Lower 4 bits of Write Precompensation

 

 

 

 

Bits 3-0

= Upper 4 bits of Landing Zone

 

 

 

 

 

 

 

 

 

Byte 3

 

 

 

 

28h

 

Bits 7-6

= Reserved

 

 

 

 

 

 

 

 

Bits 5-0

= Upper 6 bits of Write Precompensation

 

 

Byte 4

 

 

 

 

29h

 

Bits 7-0

= Number of Heads

 

 

 

 

 

 

 

 

 

 

 

 

 

Byte 5

 

 

 

 

2Ah

 

Bits 7-0

= Sectors Per Track

 

 

 

 

 

 

 

 

 

 

2Bh

 

Boot Password

 

 

 

 

 

Bit 7

= Enable/Disable Password

 

 

 

 

0

=

Disable Password

 

 

 

1

=

Enable Password

 

 

Bits 6-0

= Calculated Password

 

2Ch

 

SCU Password

 

 

 

 

 

Bit 7

= Enable/Disable Password

 

 

 

 

0

=

Disable Password

 

 

 

1

=

Enable Password

 

 

Bits 6-0

= Calculated Password

 

2Dh

 

Reserved

 

 

 

 

 

 

2Eh

 

High Byte of Checksum - Locations 10h to 2Dh

 

 

 

2Fh

 

Low Byte of Checksum - Locations 10h to 2Dh

 

 

 

30h

 

Extended RAM (kB) detected by POST - Low Byte

 

 

 

31h

 

Extended RAM (kB) detected by POST - High Byte

 

 

 

 

 

32h

 

BCD Value for Century

 

 

 

 

 

 

 

 

 

Continued...

33

Image 33
Contents SBC MSB900/LMSB900/L Detailed Technical Manual About this Manual and How to Use ItTable of Contents 10.1 Trademarks PrefaceDisclaimer Environmental Protection StatementLimited Two Year Warranty Recycling InformationTechnical Support CE Conformity Explanation of SymbolsApplicable Documents and Standards RoHS Commitment For Your SafetyRoHS Compatible Product Design RoHS Compliant Production ProcessWeee Application Swiss Association for Quality and Management Sys- tems Swiss QualityUnique Features Standard Features of the MSB900/LOverview DMAMSB900 Block Diagram MSB900/MSB900L specifications Standard AT Interfaces Specification Name Mass Storage SpecificationPeripheral Extension Specification Power Supply SpecificationRelated Application Notes Examples of Ordering CodesMSB900/L Dimensions & DiagramsDIGITAL-LOGIC AG DIGITAL-LOGIC AG DIGITAL-LOGIC AG MSB800CON Part Nr Board / Version Unit Tolerance Date / AuthorMm millimeter + / 0.1mm 25.10.2006 / BRR High Frequency Radiation to meet EN55022 MSB900/L Incompatibilities to a standard PC/ATBUS Signals Battery-LifetimeExternal battery assembling for the MSB900L Addressing PCI DevicesVersion Date Status Modifications This Bios history is not for the following productsBoot Time Power RequirementsTest environment for power consumption measurement Detailed System DescriptionInterfaces CPU, Boards and RAMsSerial Ports COM1-COM2 ControllersFloppy Disk Interface Interrupt ControllersProgrammable Timers Timers and CountersROM-BIOS Sockets RTC Real Time ClockCmos RAM Map Bios Cmos SetupDevice MapCmos Map Cmos Map Bit = Internal IDE Controller Disable Password Bits = Reserved 34h Minor CPU Revision Eeprom saved Cmos SetupEeprom Memory for Setup Memory & I/O MapSystem Memory Map Addr Function Size Comment System I/O mapIf KEL Memory Offset 100h0 = LPC MSB900/L Detailed Technical Manual MapMSR bit enables/disables into I/O Resolution Col. Dept Frequency VGA/LCD Controller of the Geode LX900Graphic Modes Connector Structure Pin Remarks Description of the ConnectorsVideo Input Flat cableTop view of the MSB900/L Bottom view of the MSB900/L Power Supply Pin Signal Shield Power supply Pin SignalX14 X15 Operator Panel / Flat Panel bottom side GND LVDSYAP1 LVDSYAM1 GND LVDSYAP0 LVDSYAM0GND LVDSYAP2 LVDSYAM2 GND Lvdsclkam LvdsclkapConnector and Adapter Mini- DIN PS/2 6 PC Remarks X31 Keyboard PS/2 and Mouse Utility ConnectorX33 10/100 BASE-T Interface Connector Pin Signal CAT X34 10/100 BASE-T Interface Connector Pin SignalX39 Serial Port COM2 Header onboard SUB connector Signal X50 USB 1 Connector Dual-USB Pin Signal RemarksX51 USB 2 Connector Dual USB Pin Signal Remarks X52 USB Udoc not assembled X60 IDE Interface Pin SignalPin Power supply GND Dlag boards have them as NC not connected X110 LPC-Port X101 PCI-104 BUS Interface PinX230 JTAG-Port Pin Signal X301 VGA Monitor CRT-Signals 15pins High-Density DSub PinTCK TMS TDI TDO Disabled Reload Default Bios SettingsJumper Locations on the Board Jumpers on MSB900/LDIGITAL-LOGIC AG Hard Disk Cable 44pin Cable InterfacesPin Signal COM1 9pin D-Sub male Pin Signal LPT1 25pin D-Sub femaleCOM1/LPT Serial Interface Cable COM2 Serial Interface Cable Pin Signal COM2 9pin D-Sub maleThermal Specifications Thermal Analysis for Case IntegrationMHz Uin MSB900/L Assembly ViewsDIGITAL-LOGIC AG Mechanical Dimensions PXE-BOOT and PXE-SETUP in the Bios Combined standard Dhcp and redirection servicesSeparate standard Dhcp and redirection services DIGITAL-LOGIC AG Product Currency Circle one PXE-LICENSE OrderMPC20 USD CHFCmos Bios CmosDram EMI / EMCROM-BIOS RTC SQSUdoc USB VGA

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.