IBM PC 300GL Types 6275, Техническое руководство

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Chapter 2. System-Board Features
Figure 3. Supported VGA Video Modes
Mode
(hex) Display
Mode Screen Resolution Colors Buffer Start
(hex) Dot
Clock
(MHz) Sweep
Rate
(kHz) Refresh
Rate
(Hz)
00 Text 40 x 25 characters 2 B8000 28.322 31.5 70
01 Text 40 x 25 characters 16 B8000 28.322 31.5 70
02 Text 80 x 25 characters B/W B8000 28.322 31.5 70
03 Text 80 x 25 characters 16 B8000 28.322 31.5 70
04 Graphics 320 x 200 pixels 4 B8000 25.175 31.5 70
05 Graphics 320 x 200 pixels 4 B8000 25.175 31.5 70
06 Text 640 x 200 pixels 2 B8000 25.175 31.5 70
07 Text 80 x 25 characters Mono B0000 28.322 31.5 70
0D Graphics 320 x 200 pixels 16 A0000 25.175 31.5 70
0E Graphics 640 x 200 pixels 16 A0000 25.175 31.5 70
0F Graphics 640 x 350 pixels Mono A0000 25.175 31.5 70
10 Graphics 640 x 350 pixels 16 A0000 25.175 31.5 70
11 Graphics 640 x 480 pixels 2 A0000 25.175 31.5 60
12 Graphics 640 x 480 pixels 16 A0000 25.175 31.5 60
13 Graphics 320 x 200 pixels 256 A0000 25.175 31.5 70
The video subsystem provides a 15-pin monitor connector on the system board. For information on
connector pin assignments, see “AGP Monitor Port Connector” on page 28.
Video Memory
The video memory interface is controlled by an S3 Trio3D graphics controller. Some models are shipped
with 4 MB SGRAM with the video subsystem, other models are shipped with 2MB SGRAM.
The video memory is 2 MB 256K X32 socket with 100MHz SGRAM. The video memory can be upgraded
from 2 MB SGRAM to 4 MB SGRAM with a 2 MB SGRAM 100 MHz SODIMM. The SODIMM can be
plugged into the SODIMM socket on the system board. For details, see
PC 300GL User Guide.
Audio Subsystem
Some PC 300GL models come with an ESS 1938 integrated audio controller. These models, which are
capable of playing and recording sounds, support SoundBlaster, Adlib, and Microsoft Windows Sound
System applications.
The device drivers for the preinstalled audio adapter are on the hard disk drive. The device drivers are
also available on the
Software Selections CD provided with all models.
If you connect an optional device to the audio adapter, follow the instructions provided by the
manufacturer. (Note that device drivers might be required. If necessary, contact the manufacturer for
information on these device drivers.)
3 An electronic device connected to the joystick/MIDI connector might require an optional adapter cable. For more information, refer
to the documentation that comes with the electronic device.
Chapter 2. System Board Features
9