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EPC-9 Hardware Reference
F-12
F
F
U
Universal Serial Bus (USB): A new serial data bus that is intended to eliminate the
need for separate serial, parallel, mouse, keyboard, joystick, etc. ports on a
PC-compatible. These ports can be conceivably replaced by a few, daisy-
chained USB ports, all with identical connectors but capable of much higher
throughput, upwards of 12Mbs.
User Editable Drive (UED): A feature of the EPC-9’s Phoenix NuBIOS. When a
“User” type hard disk drive setting shows in the IDE Adapter Sub-Menu the
BIOS queries the hard disk drive for the purpose of retrieving disk geometry.
If the hard disk drive is capable of providing this information, the BIOS uses
it to automatically set up the drive for use with the system.
V
Video Electronics Standards Association (VESA): A group of hardware and
software vendors that define specifications for hardware and software
interfaces for a variety of devices.
Video Graphics Adapter (VGA): A popular PC graphics controller and display
adapter standard developed by IBM. The standard specifies, among other
things, the resolution capabilities of the display device. Display devices
meeting the VGA standard must be capable of displaying a minimum
resolution of 640 horizontal pixels by 480 vertical pixels with at least 16
screen colors.
W - X - Y - Z
Wait State: A period of one or more microprocessor clock pulses during which the
CPU suspends processing while waiting for data to be transferred to or from
the system data or address buses.
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