Hardware Terminology - HP 330 Service Information Manual

Hardware Terminology
Hardware is used to define physical elements of these products. Different parts and locations of
hardware items are explained below.
Product Terms/Conventions
The following terms are used to describe products and their main parts and areas:
• Computer - A product containing the central processing unit (CPU) and other assemblies
such as RAM, interface, and video boards, and other accessory cards. Sometimes the
computer is referred to as the System Processing Unit (SPU).
• DIO Slots - The narrow slots for accessories in the back of the computer or expander.
Two or four slots are available as options for the computer and expander. Distinction
between these slots are:
• The top slot is an accessory card slot.
• The second slot down is an I/O card slot.
• System Slots - The wide slots in the computer or expander are for the processor, RAM,
video, or system interface boards.
• Internal (circuit) - A circuit, such as an interface, that is part of the processor board.
Internal does not mean 'inside the computer's case parts'.
• External (circuit) - A circuit that is located on an assembly other than the processor
board. External does not mean 'outside the computer's case parts'.
• Peripheral - A device external to the computer, such as a keyboard, monitor, disc drive,
plotter, printer, bus expander, etc.
• I/O :Expander - A device external to the computer that connects to the computer's DIO-II
bus. This device provides power to its installed accessory cards and pernlits more of these
cards to be used in the computer system. Sometimes they are called bus extenders. For
the Model :350 computer systems, the product name is Direct-Connect System Slot I/O
Expander.
• System - One or more computers with one or more peripherals connected together to run
an application for a desired end result.
PC Boards
PC boards in the computer and bus expander are made of several component parts. Identifying
terms used in this manual are:
• Cards - Boards installed in the DIO card cage slots.
• I/O Card - A card that outputs to and inputs from a peripheral device. They are
installed in DIO slots. For example, an RS-232 I/O card.
• Accessory Card - A card that only operates on the DIO bus and does not talk. to
a peripheral device. They are installed in either I/O or accessory card slots.
• Boards - Assemblies installed in the wide system slots or inside the product. Boards are
not usually removed or installed by users.
Product Information
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