Presario 1200 Series

Models: XL101-XL113, XL115, XL118-XL127

Code

 

Beeps

 

POST Routine Description

12h

 

 

 

Restore CPU control word during warm boost

13h

 

 

 

Initialize PCI Bus Mastering devices

 

 

 

 

 

14h

 

 

 

Initialize keyboard controller

 

 

 

 

 

16h

 

1-2-2-3

 

BIOS ROM Checksum

 

 

 

 

 

17h

 

 

 

Initialize cache before memory autosize

 

 

 

 

 

18h

 

 

 

8254 timer initialization

 

 

 

 

 

1Ah

 

 

 

8237 DMA controller initialization

 

 

 

 

 

1Ch

 

 

 

Reset Programmable Interrupt Controller

 

 

 

 

 

20h

 

 

 

Test DRAM refresh

 

 

 

 

 

22h

 

 

 

Test 8742 Keyboard Controller

 

 

 

 

 

24h

 

 

 

Set ES segment register to 4 GB

 

 

 

 

 

26h

 

 

 

Enable A20 line

 

 

 

 

 

28h

 

 

 

Autosize DRAM

 

 

 

 

 

29h

 

 

 

Initialize POST Memory Manager

 

 

 

 

 

2Ah

 

 

 

Clear 512 KB base RAM

 

 

 

 

 

2Ch

 

 

 

RAM failure on address line xxxx*RAM failure on data

 

 

 

 

bits xxxx* of low byte of memory bus

 

 

 

 

 

2Eh

 

 

 

Enable cache before system BIOS shadow

 

 

 

 

 

2Fh

 

 

 

RAM failure on data bits xxxx*of high byte memory bus

 

 

 

 

 

30th

 

 

 

Test CPU bus-clock frequency

 

 

 

 

 

32h

 

 

 

Initialize Phoenix Dispatch Manager

 

 

 

 

 

33h

 

 

 

Warm start shut down

 

 

 

 

 

36h

 

 

 

Shadow system BIOS ROM

 

 

 

 

 

38h

 

 

 

Autosize cache

 

 

 

 

 

3Ah

 

 

 

Advanced configuration of chipset registers

 

 

 

 

 

3Ch

 

 

 

Load alternate registers with CMOS values

 

 

 

 

 

3Dh

 

 

 

Initialize interrupt vectors

 

 

 

 

 

42h

 

 

 

POST device initialization

 

 

 

 

 

45h

 

 

 

Check ROM copyright notice

 

 

 

 

 

46h

 

 

 

Check Video configuration against CMOS

 

 

 

 

 

48h

 

 

 

Initialize PCI bus and devices

 

 

 

 

 

PRESARIO NOTEBOOK MAINTENANCE AND SERVICE GUIDE 1200XL SERIES

TROUBLESHOOTING 35

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Compaq XL101-XL113, XL115, XL118-XL127 manual Bits xxxx* of low byte of memory bus

XL101-XL113, XL115, XL118-XL127 specifications

The Compaq XL series of monitors, including models XL101 through XL127, represents a significant era in display technology, offering a blend of performance and functionality to meet diverse user needs. Launched in the late 1990s and early 2000s, these monitors were designed primarily for business and professional use, providing reliable, high-quality visual output.

One of the standout features of the Compaq XL series is their size and resolution capabilities. Models such as the XL118 and XL127 typically feature larger screen sizes, which enhance the viewing experience for multitasking and detail-oriented tasks. With resolutions advancing in the series, users could enjoy clearer text and vibrant images, making them ideal for applications ranging from graphic design to data analysis.

Technology-wise, Compaq equipped these monitors with advanced CRT (Cathode Ray Tube) displays. While CRT technology is considered outdated today, during the time of its release, it offered excellent color reproduction and contrast ratios, contributing to an overall immersive viewing experience. The XL series monitors also featured anti-glare screens, which minimized reflections and made them more suitable for brightly lit office environments.

In terms of connectivity, the XL series provided a variety of input options, enabling seamless integration with various computers and peripherals. Standard VGA connections were common, ensuring compatibility with most desktop systems of the time. Additionally, some models offered advanced features such as adjustable refresh rates, allowing users to optimize their display settings for smoother motion during video playback or gaming.

Another characteristic of the Compaq XL series was the ergonomic design of the monitors. Many models included height and tilt adjustments, ensuring comfortable viewing angles that could reduce eye strain during extended use. The sleek styling complemented modern office setups, making the XL series not only functional but also aesthetically pleasing.

Finally, these monitors were built with durability in mind. Compaq's reputation for quality hardware ensured that the XL series could withstand the rigors of daily use in demanding environments. Overall, the Compaq XL118-XL127 and XL101-XL113 models provided a solid foundation for many users, balancing performance, reliability, and user-friendly features that defined a generation of computer monitors.