user manual
ND-20292
CHAPTER9
APRIL, 1990
The CPM-DOS disk contains the Disk Operating
System and the m Host Program which is listed as
file named ADMI.DO.
The MS-DOS@ disk does not contain a disk operating
system; it does contain a Communication Application
Program and the BAA Host Program, both listed in a
file named COMLINK.
910.2 PC-8300 PERSONAL COMPUTER
The PC-8300 is an NEC portable laptop personal
computer containing 128K ROM and 64K RAM. It
uses an 8085 microprocessor and CMOS components
for low power consumption. It comes equipped with an
RS232C serial I/O port and a Centronics parallel
printer port. When connected to the RAA-E via
modems, the PC-8300 can be used to program the
system from a remote location. ( See Figure 910-l.)
A PC-8201A (expanded to 64K RAM), IBM PC XT,
IBM AT, NEC APCIV, NEC Powermate, Datavue’s
Sparks Laptop, NEC Multispeed or NEC Prospeed,
may be used instead of the PC-8300.
910.3 PC-8231A MICRO FLOPPY DISK DRIVE
The PC8231A is an NEC micro floppy disk drive unit
designed to work with NEC’s PC-8300 and PC8201A
computers. This disk drive unit uses a single, 3.5 inch
single sided, double density, 320K diskette. It is not
required when using the IBM compatible computers.
910.4
PC-8295A-01 RS-232C CABLE - NORMAL
The NEC PC-8295A-01 cables are standard RS-232C
jack-to-jack (male to male) cables used to connect the
computer and RAA-E Units to modems. This cable
uses pins 1 through 820, and 22.
910.5 PC-8295A-02 RS-232C CABLE
REVERSED
The PC-8295A-02 cable is an RS-232C jack-to-jack
(male to male) cable which has several wiring
reversals as compared to a standard RS-232C cable.
This cable is sometimes called a null
modem
cable.
The following leads which are used with the RAA-E
are reversed within the cable: 2 and 3; 4,and 5; and 6
and 20. Pins 1 and 7 are
not
reversed. This cable is
used when the RAA-E unit is connected directly to the
computer (without a modem). This arrangement can
be used to test the RAA-E Unit with the computer or to
familiarize oneself with the operation of the computer
in conjunction with the RAA-E.
910.6
MODEMS
Two modems are required for programming via the
Remote Administration Adaptor. The first modem is
connected to the RAA-E Unit located at the job site
where the system being programmed is located. The
second modem is connected to the computer located at
the distant location, from which the actual data entry
is being made. (See Figure 910-l).
The modems must be locally provided. They must be
asynchronous type modems capable of transmitting/
receiving data at 300, 600, 1200 or 2400 baud. Both
modems and the RAA must be set at the same baud
rate.
The RAA-E Unit uses 8 bit ASCII Protocol with 2
start/stop bits and no parity.
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Figure 910-l RAA-E Block Diagram Hook Up & Signal Flow
900-2