<J)
2K byte RAM
Work area of the sub CPU. Following information is stored.
1) User defined keys (512 bytes)
2) User defined characters (512 bytes)
3) 127 key stroke buffer (256 bytes)
4) Start program (512 bytes)
5) For future extension (256 bytes)
@
Parallel interface port
Port for interface with a printer, etc. It is constructed of CMOS IC shift
register and transistor array for buffer. Basically, it can handle only
8
parallel signal lines, BUSY signals and strobe signals. Communication
with a printer uses 15 pin parallel port, and it conforms to the
Centronics specifications.
®
Cassette interface
Interface for recording and playing back programs on a cassette tape. It
employs the FSK modulation method which converts data "1" to 2400
Hz and data
"O"
to 1200 Hz. Transmission rate is fixed at 1200 baud.
@
Serial interface
This is a 9-pin serial
110
port which conforms to the RS-232C
specifications. When used as a conventional communication port, the
transmission rate can be set from 100 baud to 8000 baud. When an
optical coupler is connected, the transmission rate can be set from 100
baud to 2400 baud. The signals are represented in T.T.L level (5V).
(fJ)
Buzzer interface
The buzzer interface is controlled with the BASIC BEEP instruction.
The speaker has 200 ohm impedance, and is driven by 50% of duty
cycle short waves.
103
Summary of Contents for X-07
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Page 8: ...1 Learning how to operate the X 07 2 Special functions and peripheral devices 3 Reference m ...
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Page 145: ...136 Instructions Others BEEP MOTOR REM Functions ABS FIX HEX INT SGN START TAB ...
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