Operation (Compaq Tru64 UNIX)

7.3.1.2 Indirect Contexts, GLXPixmaps, and the Software Renderer

The following section only concerns those who run applications that require GLXPixmap rendering support. Most applications do not fall into this category. Where GLXPixmaps are used for multi-buffering, they should be replaced by OpenGL double-buffering if possible. But if your application requires GLXPixmap support, this section describes how to enable it.

Follow these steps to enable a generic software OpenGL renderer for indirect rendering contexts in the X server, opposed to the hardware-accelerated driver:

1.Login to the system as root. Ensure that no other user is currently working locally at the X console or connected remotely to the X server. You may choose to reboot the system in single-user mode before continuing.

2.Edit the file /var/X11/Xserver.conf. Save a backup copy.

3.Find the line containing PowerStorm 300/350 X server command-line arguments. Search for the text “ PowerStorm 300/350 Server args start” and proceed to the next line where the arguments reside.

4.Append a –Iargument to the list if one is not already present. This indicates the beginning of device-dependent arguments.

5.Append the –riGLXuseSWindirectargument to the list as follows:

! PowerStorm 300/350 Server args start

-pn –su –bs –nice –2 –I –riGLXuseSWindirect

! PowerStorm 300/350 Server args end

6.Save your changes to the /var/X11/Xserver.conf file.

7.Restart the server:

> /sbin/init.d/xlogin restart

To disable the synchronization, follow these same steps, but remove the

-riGLXuseSWindirectargument. If no other device-dependent arguments are present, you may also remove the –Iflag from the end of the list.

In addition, you must indicate to the client library that indirect rendering contexts are allowed. Set the ALLOWINDIRECT environment variable in your application’s environment before running it, as shown (assuming a csh compatible shell):

> setenv ALLOWINDIRECT

In most cases, the performance of indirect rendering contexts and the generic software renderer does not come close to that of hardware-accelerated direct rendering. Therefore its use is only recommended when GLXPixmap support is an absolute requirement.

7–6PowerStorm 300 AGP and 300/350 PCI Graphics Controllers

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Compaq 300 manual Indirect Contexts, GLXPixmaps, and the Software Renderer
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300 specifications

The Compaq 300, introduced in the early 1990s, marked a pivotal moment in personal computing, combining cutting-edge technology with user-centric design. This desktop system was targeted at both business professionals and home users, reflecting the growing demand for powerful yet affordable computing solutions.

One of the main features of the Compaq 300 was its robust Intel processor. It originally shipped with various configurations of Intel's 80486 microprocessor, which provided a significant performance boost over its predecessors. The 486 architecture enabled users to run more complex applications, enhancing productivity and making it suitable for tasks ranging from word processing to graphics editing.

In terms of memory, the Compaq 300 supported up to 16MB of RAM, which was substantial for its time, allowing seamless multitasking of programs. The system typically included a 120MB IDE hard drive, which facilitated ample storage for documents and software, a critical aspect for users who needed to manage large volumes of data.

The Compaq 300 featured an integrated graphics card based on the popular VGA standard, enabling clear display quality for applications and gaming. Notably, its 14-inch CRT monitor that accompanied the system offered crisp visuals and an optimal viewing experience for users.

Another characteristic of the Compaq 300 was its expandability. The desktop came equipped with several expansion slots, allowing users to easily add components such as sound cards, network cards, or additional storage drives. This feature provided users with the flexibility to upgrade their systems as technology evolved, ensuring longevity in a rapidly changing landscape.

The Compaq 300 also showcased advanced connectivity options for its time. It included multiple serial and parallel ports, providing versatile connectivity with peripherals like printers, scanners, and modems. This adaptability was crucial, especially as businesses began to integrate more technology into their operations.

Durability and reliability were hallmarks of Compaq's design philosophy, and the Compaq 300 was no exception. Its solid construction and dependable components appealed to users who required a trustworthy system for daily tasks.

Overall, the Compaq 300 epitomized the intersection of performance, expandability, and reliability in desktop computing. Its innovative features and thoughtful design paved the way for future developments in the personal computer industry, making it a noteworthy entry in the history of computing technology.
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