Specifications

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Glossary
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segment address 4 bits to the left and then adding the offset value. A real mode
address is a physical address.
Real Time Clock (RTC): Peripheral circuitry on a computer motherboard which
provides a nonvolatile time-of-day clock, an alarm, calendar, programmable interrupt,
square wave generator, and a small amount of SRAM. In the EPC-30, the RTC
operates independently of the system PLL which generates the internal system clocks.
The RTC is typically receives power from a small battery to retain the current time of
day when the computer is powered down.
Reflashing: The process of replacing a BIOS image, in binary format, in the flash
boot device.
Register: An area typically inside the microprocessor where data, addresses,
instruction codes, and information on the status on various microprocessor operations
are stored. Different types of registers store different types of information.
Register Location: A set up value in the EPC-30 BIOS which defines the base
location at which the configuration register block in an ATA PC card may be found.
Reset: A signal delivered to the microprocessor by the control bus, which causes a
halt to internal processing and resets most CPU registers to 0. The CPU then jumps to
a starting address vector to begin the boot process.
Resident Flash Array (RFA): The RFA represents flash memory that is resident on
the hardware platform that is utilized for OS or application purposes.
Rommable DOS: A special DOS designed specifically to load into and operate from
semiconductor ROM. Rommable DOS consumes much less memory space than DOS,
and because it resides in ROM, boots much more quickly than DOS.
ROM/RAM Disk: A feature of the Phoenix PicoBIOS allowing the use of RAM,
ROM, a PC card or other semiconductor memory storage devices to be accessed by
the CPU like a fixed disk in the same manner as a fixed disk.
RS-232: A popular asynchronous bi-directional serial communication protocol.
Among other things, the RS-232 standard defines the interface cabling and electrical
characteristics, and the pin arrangement for cable connectors.
Row Address Strobe (RAS): An input signal to an internal DRAM latch register
specifying the row at which to read or write data. The DRAM requires a row address
and a column address to define a memory address. Since both parts of the address are
applied at the same DRAM inputs, use of row addresses and column addresses in a
multiplexed array allows use of half as many pins to define an address location in a
DRAM device as would otherwise be required.
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Segment: A section or portion of addressable memory serving to hold code, data,
stack, or other information allowing more efficient memory usage in a computer