These small pocket computers were derived from the PC-1251. They
had same keyboard and size. The main difference was the larger display, which
now provided two lines with 24 characters, which was a great advantage,
especially for BASIC programming. The built-in BASIC interpreter was also close
to the PC-1251 interpreter.
In 1984, the PC-1260 and PC-1261 were released. The only difference between
these two was that the former had 4 KB RAM and the latter 10 KB. Internally,
they were operated by the SC61860 CPU (8 bits), which was clocked 33% faster
than in the PC-1251.
The CPU was mounted on the main PCB, together with the two display driver chips SC43536. Memory was incorporated on a second small PCB. The PC-1260 had the SC613256 ROM plus two HM6116 8K x 8 RAM ICs. The PC-1261 had the
same ROM, but five "naked" RAM chips, i.e. chips without DIL case, mounted
directly onto the PCB.
Two years later, the PC-1261 was re-released as the PC-1262. It was identical in functional terms, but had a different case color scheme. Internally, it was
based on the same main PCB, but the memory PCB was now equipped with a SC623257 ROM, a HM6264 8K x 8 RAM, and a LH5116 2K x 8 RAM.
The picture represents a PC-1261 mounted on a CE-125 micro cassette recorder and thermal printer unit.
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I had what seems to be quite a common problem. After the battery replacement, the device was restored to what is likely a default Japanese set up. I tried the hard reset a couple of times, but they were not close enough, and instead two consecutive hard resets switched the keyboard perfectly to the English character set. I am very grateful the those who proved this workaround was successful.
When you have eliminated the impossible, whatever remains, however improbable, must be the truth. â€“ Sir Arthur Conan Doyle, stated by Sherlock Holmes
Monday 12th December 2022
I had the same issue with the Sharp PC-1260. It came up in japanese mode after a battery change.
I managed to get it to switch back to ASCII mode by pressing reset a couple of times.
Thursday 8th December 2022
I got a pc-1262 and every time i change batteries get the japanese. After several push in the reset it get to EU/USA characters. Also the programs gone out. i tried reset pressing a key but programa alwats gone. In the manual came to csave prior to battery replacemen.
Sunday 13rd November 2022
PC-1260 PC-1261 PC-1262
BUILT IN LANGUAGE
Sharp Basic interpreter
52 keys, QWERTY caculator type with numeric key-pad