Serial/Parallel Ports; Graphics/Integrated Video - HP Vectra VL5 4 Technical Reference Manual

SERIAL/PARALLEL PORTS

The Super I/O chip supports two serial ports and one bidirectional parallel port. The serial ports
are high speed UARTs with 16 Byte FIFOs, and can be programmed as COM1, COM2, COM3,
COM4, or disabled.
The parallel port can operate in four modes:
• Standard mode (PC/XT, PC/AT, and PS/2 compatible)
• Bidirectional mode (PC/XT, PC/AT, and PS/2 compatible)
• Enhanced mode (Enhanced Parallel Port or EPP compatible)
• High speed mode (MS/HP Extended Capabilities Port or ECP compatible).
It can be programmed as LPT1 (378h, IRQ7), LPT2 (278h, IRQ5), or disabled.

GRAPHICS/INTEGRATED VIDEO

The integrated video subsystem is composed of a PCI bus video controller and a DRAM array.
The Vectra VL 5/xx series 4 PC uses the S3 Trio 765 64V+ or S3 Trio 764 video controller.
These video controller embed a RAMDAC, and supports video resolutions of up to
1280 x 1024.
Video Controller
The S3 Trio 765 64V+ and S3 Trio 764 video controllers offer full compatibility with VGA. In
addition, the features are enhanced beyond Super VGA by hardware which accelerates
graphical user interface operation in environments such as Microsoft Windows or OS/2.
NOTE
The enhanced features include:
• direct connectivity to PCI bus
• true acceleration for 8, 16 and 32-bit pixel depths
• 60 MHz clock for video memory
• fully programmable Pixel Clock Generator up to 135 MHz
• supports 2 MB DRAM
• fast linear addressing with full software relocation.
Video DRAM
The Vectra VL 5/xx series 4 PC is supplied with 1 MB of video DRAM as standard. An
additional 1 MB video DRAM accessory can be installed, to give a total of 2 MB video DRAM.
The upgrade consists of two 512 KB video memory chips.
Video Resolutions Supported
A table detailing all the video resolutions supported can be found in chapter 5 of this manual.
The S3 Trio 765 64V+ and S3 Trio 764 video drivers
are not compatible.
D3xxxA models use the S3 Trio 765 64V+.
D3xxxB models use the S3 Trio 764.