Juniper Systems Allegro DOS Manual - Manual (Page 107)

Allegro DOS Owner’s Manual 107
Disk-On-Chip (Hard Disk)
A disk-on-chip is a solid state disk drive. The C: drive on the Allegro
is a disk-on-chip. It can be read from and written to just like the hard
drive on a PC but has no moving parts and does not require power
to maintain contents.
Kilobyte
One kilobyte (K or KB) is thought of as one thousand bytes (the
actual fi gure is 1,024 bytes).
Megabyte
One megabyte (M or MB) is thought of as one million bytes (the
actual fi gure is 1,048,576 bytes). The Allegro comes with 16 M of
RAM and 24 M of disk storage.
PCMCIA Card (PC Card)
PCMCIA is an acronym for Personal Computer Memory Card
Interface Association. When the proper software (device drivers) is
installed on the Allegro, an SRAM card or ATA FLASH card may
be inserted in the slot provided. A PC card may also be a modem,
RF transceiver, GPIB interface or several other possible devices. The
Allegro device drivers automatically detect these devices when they
are installed in the PC card slot.
RAM (Random Access Memory)
RAM is often referred to as the computer’s workspace. This is where
programs are executed or run. RAM can be written to, read from,
erased, etc. Its storage ability is temporary in nature, only holding
information while the system has power.
ROM Disk (Read Only Memory)
ROM disks are different from RAM disks in that they are written to
only once; upon original creation. Thereafter, they can only be read
from much like a write-protected fl oppy disk. If you attempt to write
to a ROM disk the Allegro displays an error message. The ROM
drive in the Allegro is the A: drive.
MS DOS
MS DOS ™ 6.22 is Microsoft Corporation’s version of DOS. It is
embedded in the Allegro’s ROM (Read Only Memory) and can run
entirely from within ROM.
▲
▲
▲
▲
▲
▲
▲