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 just got the same problem described here: Changed batteries and the Sharp PC-1262 came up in Japanese mode instead of European/US mode. I tried several things, but to no avail. In the end, I tried this: - remove batteries - set the on/off switch to Pro (or RSV, I''m not sure) - put the opened PC-1262 upside down in it''s plastic hard cover (to avoid to accidentally press a key - $ new batteries, but do not slide the battery compartment cover at this moment - press and hold the all reset switch, at the same time slide the battery compartment cover over the batteries
For me, that worked fine. The PC-1262 came up in European/USA mode again. However, I am not sure about the position of the on/off switch I used.
Wednesday 14th October 2020
Hi, I recently got a Sharp pc-1261, and everything so far seems to work...although it''s in Japanese. When I use the Help feature, all the basic terms are in english. There must be a way to switch to English, the reset button doesn''t see to do it.
Friday 10th April 2020
What are the difference between the PC-1260 and 1251 ? Is it hardware or software (instructions) ?
Tuesday 18th July 2017
PC-1260 PC-1261 PC-1262
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Sharp Basic interpreter
52 keys, QWERTY caculator type with numeric key-pad