website/content/museum/sharp-pc-1250-pc-1251.md

title, categories, types, origins, years, cpus, params

title	categories	types	origins	years	cpus	params
Sharp PC-1250 PC-1251	Computers	Pocket	Japan	1982	CMOS SC61860	name image company company_name specs tabs forum_thread photos emulators links docs related oc_id source PC-1250 PC-1251 /media/museum/photos/sharp_pc1251_system_s1.jpg /companies/sharp Sharp label value NAME PC-1250 PC-1251 label value MANUFACTURER Sharp label value TYPE Pocket label value ORIGIN Japan label value YEAR 1982 label value BUILT IN LANGUAGE BASIC interpreter label value KEYBOARD 52 keys, QWERTY calculator type with numeric key-pad label value CPU CMOS SC61860 (8 bits) label value SPEED 576 kHz label value RAM 4 KB label value ROM 24 KB label value TEXT MODES 1 line x 24 char. 5x7 dot matrix label value GRAPHIC MODES None label value COLORS Monochrome LCD label value SOUND CPU controlled piezo buzzer, fixed frequency and duration via BASIC statement label value SIZE / WEIGHT 135 (W) x 70 (D) x 9.5 (H) mm / 115 g (with batteries) label value I/O PORTS Proprietary 11-pin expansion bus label value POWER SUPPLY 6 volts, 2 x CR 2032 lithium cells label value PERIPHERALS CE-126P thermal printer\ CE-124 Tape recorder interface\ CE-125 Thermal printer and micro cassette recorder label value PRICE About 340 (Germany, 09.1982) photos emulators links docs 1061 title subtitle text image LARGE VIEW /media/museum/photos/sharp_pc1251_system_s2.jpg title subtitle text image FRONT VIEW /media/museum/photos/sharp_pc1251_frontview_s1.jpg title subtitle text image BOTH SIDES Note the contrast adjustment button on the right side and the 11-pin expansion connector (covered by a plastic lid) on the left side. /media/museum/photos/sharp_pc1251_sides_s1.jpg title subtitle text image BACK SIDE /media/museum/photos/sharp_pc1251_back%20side_s1.jpg title subtitle text image IN ITS PLASTIC CASE /media/museum/photos/sharp_pc1251_incase_s1.jpg title subtitle text image COMPLETE SYSTEM Complete system in its carrying case, with the CE-126P - printer and cassette interface. The small housing alowed to carry the AC adaptor, spare cassettes tapes and paper rolls. /media/museum/photos/sharp_pc1251_compsystem_s1.jpg title subtitle text image THE ELECTRONICS The components side of the main card actually faces the plastic part and memory card. **(1)** Reset switch\ **(2)** Battery cell connectors\ **(3)** LCD contrast button\ **(4)** SC43536 display driver\ **(5)** 11-pin expansion connector\ **(6)** SC61860 CPU\ **(7)** Piezzo buzzer\ **(8)** Memory card connector Memory card:\ **(9)** Toshiba TC5517 2Kx8-bit RAM chips (HM6116 equivalent)\ **(10)** LH532916 24 KB ROM chip. Holds the BASIC interpreter. /media/museum/photos/sharp_pc1251_inside_s1.jpg title subtitle text image PC 1253 The PC 1253 was an OEM version of the PC 1251. It had a reduced keyboard and ran a pre-installed program. This French model was used to draw up estimates in the building trade. A PC-1252 (similar desing but 2 KB of RAM) was also released. /media/museum/photos/sharp_pc1253_system_s1.jpg title url platform text POEMS http://sourceforge.jp/projects/poems/ Unix / Linux PC-12xx, 14xx & 13xx emulator title url platform text PockEmul http://pockemul.free.fr/ Multiplatform Emulates nearly all Sharp pocket computers! title url text Web Wiz CAPTCHA http://www.webwizcaptcha.com title url cover text SHARP PC-1251 - INSTRUCTION MANUAL http://www.usersmanualguide.com/sharp/calculator/pc-1251 /media/museum/docs/couvs/sharp-1251_user-manual.jpg [**SHARP PC-1251 - INSTRUCTION MANUAL**](http://www.usersmanualguide.com/sharp/calculator/pc-1251)written by Sharp  type of document : PDF\  size : 3.65 MB\  source : [UsersManualGuide.com](http://usersmanualguide.com) title url cover text SHARP PC-1250/CE-125 APPLICATION SOFTWARE PROGRAM EXAMPLES null /media/museum/docs/couvs/pc1250ap.jpg **SHARP PC-1250/CE-125 APPLICATION SOFTWARE PROGRAM EXAMPLES**\ written by Sharp  compiled/archived by James L. Dunlap, Jr\  type of document : PDF\  size : 1,8 MB **... READ THE ONLINE VERSION BY CLICKING BELOW :** /museum/sharp-pc-1210-1211-1212 /museum/sharp-pc-1245 /museum/sharp-pc-1260-pc-1261-pc-1262 /museum/sharp-pc-1401-pc-1402-pc-1421 /museum/sharp-pc-1403-h /museum/sharp-pc-1500-pc-1500a /museum/sharp-pc-2500 1091 url date https://web.archive.org/web/20230608151812/http://www.old-computers.com/museum/computer.asp?c=1091 2023-06-08

With the PC-1251, Sharp started off their product range of really tiny pocket computers. It was the third original design after the PC-121x and PC-1500 series.

Contrary to its predecessors, it was really pocket sized, measuring only 135 x 70 x 9.5 mm. Nevertheless, it featured a 24 character display, and with 4 KB RAM it even outclassed the PC-1500 basic version. The major drawback of the new design was that the tiny keys are only compatible with pointed fingers.

The PC-1251 was based on a new 8-bit CMOS micro processor, the SC61860, which was mounted on the main PCB together with the display driver chip SC43536. On an additional small PCB, 24 KB ROM (LH532917) and 4 KB RAM (two HM6116 2k x 8 chips) were located. A new feature was the so-called "reserve memory" which allowed to assign often used BASIC commands or functions to 18 of the alphanumeric keys.

Together with the PC-1251, the CE-125 thermal printer and micro cassette recorder unit was introduced. With integrated NiCd accumulators, it was fully mains independent and made the 1251 into a very compact mobile computing system. The CE-125 also featured an additional tape interface for external tape recorders.

The PC-1250 was the same machine as the PC-1251 but with only 2 KB of RAM.

Thanks to Roman von Wartburg and his site for information and picture.