HP Vectra VL800, Technical Reference Manual, Page: 90 / 147

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4 Interface Cards
SCSI Adapter Cards
• Includes 8 KB of internal RAM for SCRIPTS instruction storage to reduce
or eliminate instruction fetches over the PCI bus.
• Provides data reliability and cable distance of differential SCSI without
cost of external differential transceivers.
• Improves connectivity (up to 15 LVD devices) and cable lengths (up to 12
meters with LVD SCSI bus). Longer cables may be possible in point-to-
point connections.
• Supports SURElink (Ultra 160 SCSI Domain Validation) to ensure link
integrity at Ultra 160 transfer rates and to renegotiate to lower speed and
bus width if necessary.
PCI connector
• One 64-bit universal connector (supports both 5 V and 3.3 V signaling).
• Configured as a 15 W board (PRSNT1 and PRSNT2 grounded).
• The SCSI Adapter Card sink current on the 5 V power supplies lines. The
3.3 V is supplied by an on-board regulator.
PCI Bus
• Complies with PCI Specification 2.2.
• Supports 64-bit, 33 MHz PCI Bus.
• Supports PCI write and invalidate, read line and read multiple commands.
• Functions as full 64-bit PCI DMA Bus Master.
• Operates on 3.3 V or 5 V PCI buses.
Terminators
• Three multi-mode SE/LVD active, auto-terminating terminators
• Auto-termination: terminators are active when one of the tow connectors
is used. If both connectors are used at the same time, terminators will
automatically switch to high impedance mode.
• The terminator will automatically detect the bus type (LVD or SE) and
switch to the right mode.
Flash memory
The flash memory stores the SCSI BIOS. Refer to the following section for
information about the Symbios SCSI Configuration Utility.