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Pocket computer
PC-1350 is a small calculator-size pocket computer, introduced in 1984 by
Sharp Corporation in Japan. The device is powered by two button cells and
runs at 768 kHz. It has a built-in BASIC interpreter and features a display
with graphical capabilities.
Between 1985 and 1988, it was used in East-Germany
as part of the WSA-6 spy radio set.
It was superseded in 1987 by the PC-1360.
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The device measures 182 × 72 × 16 mm and weighs just 190 grams, batteries
included. Unlike a regular calculator, where each mathematical function has
its own button, the PC-1350 is programmed in BASIC,
allowing the use of complex
looped and nested calculations (FOR/NEXT).
The basic 4KB of memory can be expanded by installing a 8KB or 16KB RAM card
at the rear of the device. Each RAM card has a built-in backup battery, so
that the contents are retained when the card is removed.
Apart from BASIC, it can also be programmed in Machine Language (ML).
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The image below shows the top surface of the PC-1350, with a quick overview
of the functions. At the top left is the clear Liquid Crystal Display (LCD),
which can shows 4 lines of text with 24 characters each.
It can also display graphics – for example a bar chart – with a resolution of 150 × 32 pixels.
Below the display are the alphabetic keys (A-Z) in QWERTY order.
At the right is a numeric keypad with the basic calculation functions
(add, subtract, multiply and divide).
At the top right is the power switch. When unused, the device enters sleep mode
after ~ 11 minutes.
At the right side of the device
is a 15-pin expansion connector with a serial RS232 port,
which can be used for the connection of a printer, plotter,
modem or any other device that communicates via RS232.
To its right is a recessed knob
for adjustment of the display contrast. Further expansion is possible via the
11-pin connector
at the left side of the device (not visible here).
The device has a 4KB CMOS programming memory (RAM) of which the contents
are retained by the battery when the device is switched off. The programming
memory can be expanded to 12KB or 20KB, by installing an 8KB or 16KB RAM
expansion card behind a lid at the bottom. The expansion bay is visible in
the image above. Each expansion card has a built-in
battery to retain its contents when the card is removed from the device.
Also behind the lid at the bottom, are the two CR-2032 button cell batteries
that power the device. Slide the bracket to the left to access the batteries.
The instruction panel above the battery bay shows how this should be done.
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Error messages are displayed in the format:
'ERROR 3 IN 30' , in which '3' is the error number and '30' is the line
number at which it occurred.
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- Syntax error
- Calculation error
- Illegal function argument
- Too large a line number
- NEXT without FOR, or RETURN without GOSUB
- Memory overflow
- PRINT USING error
- I/O device error
- Other error
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Shield FG Frame Ground TXD SD Transmit Data (out) RXD RD Receive Data (in) RTS RS Request To Send (out) CTS CS Clear To Send (in) DSR DR Data Set Ready (in) GND SG Signal Ground CD CD Carrier Detect (in) - - unused Vcc PWR External gate power (out) RR RR Receive Ready (out) - - unused Vc Vc For 1350 drive (in) DTR ER Data terminal ready (out) - - unused
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11-pin expansion connector
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BZ ? FG Frame ground (shield) Ack Acknowledge Din Data in Xout ? - Busy
Dout Data out Vgg +V GND Signal ground MT2 ?
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Device Pocket computer Purpose Programming, calculating, communication Model PC-1350 Manufacturer Sharp Country Japan Year 1984 Successor PC-1360 Memory 4 KB (expandable to 12 KB or 20 KB) 1 ROM 40 KB CPU 8-bit CMOS SC61860 Speed 768 kHz Languages S-BASIC, Machine Language Display 4 lines × 24 characters, 32 × 150 pixels Sound Beep Interfaces 11-pin expansion, 15-pin serial I/O Power 6V/DC: 2 × CR-2032 lithium button cell Consumption 0.03 W Temperature 0°C to 40°C Dimensions 182 × 72 × 16 mm Weight 190 gram (batteries included)
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By adding a 8 KB or 16 KB RAM card.
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CE-201M 8 KB RAM expansion (battery backed) CE-202M 16 KB RAM expansion (battery backed) CE-203M 32 KB RAM expansion (only 16 KB usable) CE-126P Thermal printer CE-140P 4-colour ink-jet printer CE-515P 4-colour pen plotter (needs CE-516L cable) CE-516P 4-colour pen plotter (needs CE-516L cable) CE-124 External tape interface CE-126P External tape interface CE-152 Tape recorder CE-127R Mini tape recorder RD-720 Tape recorder CE-130T RS232 interface (level converter in external case, DB25/F) CE-131T RS232 interface (requires null-modem cable) CE-132T RS232 interface (level converter in 25-pin DB25/F connector) CE-133T RS232 interface (level converter in 15-pin SIO connector, DB25/F) CE-135T RS232 interface (level converter in 15-pin SIO connector, mini DIN-8) CE-136T ? CE-137T RS232 interface (DE9/M, no cable) CE-140T RS232 interface (level converter in 15-pin SIO connector, DB25/F)
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Type Asynchronous Speed 300/600/1200 baud Prity Odd/even/none Format 7/8 bits, 1/2 stop bits Level TTL 4-6V Signals TXD, RXD, RTS, CTS Cable CE-140T (RS232 cable)
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© Crypto Museum. Created: Saturday 24 May 2025. Last changed: Tuesday, 10 June 2025 - 19:56 CET.
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