HP Vectra VE5 2 Supplementary Manual page 7

• The desktop's backplane has one PCI slot, one combination ISA/PCI slot, one ISA slot
and one HP proprietary ISA slot for accessory boards.
New Features
• A completely upgradable Pentium-based system board (using system board
switches and voltage regulator module).
• A new keyboard supporting Windows 95 special key functions.
• Vectra Ergonomic Power Solution (VEPS): space bar power-on (under any
operating system), push-button status panel, and software shutdown from
Windows 95.
• HP's new style BIOS.
System Board
The main features of the system board are:
• A system board that can mount PENTIUM processors (with accompanying Voltage
Regulation Module) at several different clock speeds (75 MHz, 100 MHz and 133 MHz).
• A new type of main memory module called EDO (Extended Data Output) for faster
memory access times (60 ns).
• Optional 256KB of synchronous pipeline burst level 2 cache.
• A 64-bit host bus for PENTIUM processor, cache and main memory.
• A 32-bit Peripheral Component Interconnection (PCI) local bus for accessing the video
controller and IDE controller.
• An Industry-Standard Architecture (ISA) bus for ISA-compatible controllers (for devices
such as flexible disk drives, serial ports, parallel port, and audio card in multimedia
models).
• A dual password (administrator and user) security system that provides protection against
unauthorized use of the PC.
• A flash BIOS updating facility.
Microprocessor
The Pentium microprocessors used in the HP Vectra VE 5/xx series 2 use internal clock
multiplication, similar to that used by the 486 DX2 processor. The microprocessor's internal
clock is a multiple of the system clock. The Pentium 75 MHz and 100 MHz processors multiply
the 50 MHz and 66 MHz system clock by a factor of 1.5. The Pentium 133 MHz processor
doubles the 66 MHz system clock. The Pentium 150 MHz processor multiplies the 60 MHz
system clock by a factor of 2.5. To set the appropriate switches for each processor speed,
refer to the Pentium Processor table in the section System Board Switches in chapter 2.
The system board of the HP Vectra VE 5/xx series 2 has a Voltage Regulator Module (VRM)
which supplies the Pentium processor with the correct voltage. The VRM allows the processor
to be upgraded without replacing the system board.