4.10 Acoustic Coupler
With an acoustic coupler, you can connect the PX-8 to a computer (such as
another PX-8, Epson QX-IO
or
a large computer) in another place using the
telephone line.
Data
is
transfered through the RS-232C interface.
Acoustic
Coupler
The TERM and
FlUNK
utility programs described in Chapter
3,
enable com-
munications to be handled with a minimum
of
effort. More information
is
given
under these programs.
Such communication can also be achieved in BASIC.
Cable
#
724
is
required to attach to
an
acoustic coupler with a DB25 connector.
The acoustic coupler models available differ from country to country.
See
your
Epson dealer for detailed information.
4-42
Chapter 5
THE
SYSTEM
INTERFACE
The operating system
of
the PX-8
is
an expanded version
of
the
CP
1M
operat-
ing system, version 2.2. This chapter deals with the more advanced aspects
of
using the PX-8 and will be
of
more use to programmers
than
any other users.
It
contains information on subroutines which can handle peripheral devices and
files. Familiarity with assembler programming
is
a prerequisite for using these
subroutines and functions. You must purchase an assembler such as MACRO-80
and other program development tools from your dealer for using these BDOS
and
BIOS subroutines.
Users who are not interested in assembler programming may skip this chapter.
Further information on the operating system will be published as a separate
manual.
5.1 The CP
1M
Configuration
The configuration
of
the expanded
CP
1M
is
as follows:
Fig. 5-1
5-1
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