2
1.1 Features
The MZ-80B
is
a compact personal computer with superb operability which features a variety
of
software and freely expandable hardware.
The CPU (Central Processing Unit) and the main memory form
the
nucleus
of
the
computer.
The
MZ-80B uses
the
Z80A microprocessor (equivalent
to
the LH0080A produced
by
Sharp),
one
of
the
best microprocessors currently available for central processing units. The main memory which can be
directly accessed
by
the CPU
is
constituted entirely
of
random access memory.
It
is
expandable
to
64K bytes. Consequently, no fixed programs
or
data reside in
the
main memory and any
type
of
system software can be loaded
into
it from an external file. This makes it possible
to
make
the
best
possible use
of
the
main memory area.
The
1/0
devices, timer, initial program loader, etc., support
the
CPU and main memory.
The
initial
program loader
is
automatically started when
the
power switch
of
the MZ-80B
is
turned on.
It
loads
programs from a cassette
tape
or
diskette file, then transfers control
to
the
program loaded.
A typewriter keyboard, numeric pad, special function keys, cursor control keys and cassette
tape
deck control keys are included
on
the
control panel. A variety
of
control commands and data can be
entered with these keys.
Both character display and graphic display are possible, allowing various forms
of
data representa-
tion.
FIGURE
1.1
Personal Computer MZ-80B
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