RCA CDPl8S693 User Manual page 7

6 ____ User Manual for Microboard Computer Development System CDP18S693 & CDP18S694
The cassette tape interface cable connects the
CDPl8S652 controller board to the cassette drive
mechanism. Wire markers identify plugs "M IC ,"
" REM ," and "M ON" at each end of the cable
assembly. The "REM" plug at each end of the cable is
smaller than the other plugs and is to be plugged into
the "REMOTE" jack at the tape recorder end. Plug
"MON" is plugged into the "MONITOR" jack and
plug "M IC" into the "M IC"jack. The other end of the
cable is then plugged into the correspondingjacks of
the tape controller board CDPl8S652 at the tape 0 or
the tape l interface. The cassette cable can be attached
or removed with power on the system.
To start the system, the user should first make sure
that the various units are connected as shown in Fig. l,
that the volume control on the cassette recorder unit is
set at maximum (l0), and that the tone control is set at
maximum (l0). The user should then place the
RESET/ RUN switch in the reset position and plug in
the power supply and the cassette tape system power
cable. Next, place the RESET/ RUN switch in the run
position. Press the carriage return key on the terminal
and the system should respond with an asterisk (*)
indicating that the system is ready to accept user
commands. If an asterisk prompt is not received, the
user should examine all connections and restart the
system with the RESET/RUN switch and then press
the carriage return key.
The following brief tests of the system operation
utilize the Insert(I) and Display(D) instructions of the
monitor program and indicate whether the monitor
program is operational. The carriage return key (CR)
signifies the "end of transmission" to the system when
it is waiting for a specific response. (H indicates
hexadecimal notation)
Test l —Display
Type:
E>8000 4 (CR)..Display 4 bytes at memory 8000H
System Response:
8000 7100 F880
Test 2—Insert and Display
Type:
10000 11223344(CR) ..Insert bytes 11, 22, 33
System Response:
*
Type:
D0000-0003(CR) . .Display memory contents from
. .0000H through 0003H
System Response:
0000 11223344
The Insert and Display instructionsjust illustrated
are discussed in detail in the next section along with
other features of the monitor program.
. .44 into memory at 0000H