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.
What are the difference between the PC-1260 and 1251 ? Is it hardware or software (instructions) ?
Tuesday 18th July 2017
«downloadable versions of the programming/operations manual that is in English»: on the net you can find Enlish manual in PDF for PC-1251: operation is near identical to PC-1261 with only a few differences (I can tell you some of the differences).
Manual for PC-1251: http://pocketcomputerworld.free.fr/Manuals/PC-1251.pdf
Thursday 12th March 2015
I have a Sharp PC-1261 with CE-125 Printer and Microcassette Interface and all the manuals (3, English). Neither has had a lot of use. I wanted to use them recently but the PC-1261 no longer works correctly, most likely due to bad connections from the 2 segmented rubber strip LCD connectors used in this device. I''ve tried cleaning/re-seating them with very little success. I don''t hold out much hope of getting the 1261 operating again since those connector strips are not a commmonly available item.
I''d be interested in obtaining a working 1261 or 1262 in exchange for good copies of the manuals. Please e-mail if interested to email@example.com.
Friday 28th November 2014
tonymax2 (Columbus, Ohio area/USA)
PC-1260 PC-1261 PC-1262
BUILT IN LANGUAGE
Sharp Basic interpreter
52 keys, QWERTY caculator type with numeric key-pad