Sharp PC-E500S

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Sharp PC-E500S
Sharp PC-E500S in RUN mode (BASIC programming)
Type Pocket computer
Introduced 1995
Predecessor Sharp PC-E500
Entry mode Infix, BASIC,
Precision 10 (single precision)
20 (double precision; not available in CAL, MATRIX, and STAT modes)
Display type LCD Dot-matrix
Display size 4×40 characters
Processor Sharp SC-62015
Frequency 2.304 MHz
Programming language(s) BASIC
User memory 32 KB (built-in), custom-expandable to 256 KB
Firmware memory 256 KB

1 vendor-specific (serial/printer/disk drive)

1 TTL-level serial communications port
Power supply 4 × R03 AAA
1 CR2016
Power consumption 0.09 W
Weight 340 g (including lid and batteries)
Dimensions 22×10.45×1.9 cm (lid closed)

The Sharp PC-E500S was a 1995 pocket computer by Sharp Corporation and was the successor to the 1989 PC-E500 model, featuring a 2.304 MHz CMOS CPU.


It was slightly wider, and the keys are slightly larger than the previous model. The display had more contrast, and the keyboard cover is a (removable) hinged lid (clamshell) instead of plastic slipcase. There were also four additional BASIC commands. Programs written on PC-E500 were executable on the PC-E500S.

It came with 32 kB of RAM which could be upgraded to 96 kB using memory expansion cards. The monochrome LCD had 240×32 pixels which could display four lines with 40 characters per line as well as graphics. The 256 kB system ROM the contained the BIOS, a diagnostic suite,[1] and the BASIC interpreter used to program the device.

ROM Diagnostic menu.
Diagnostic menu in ROM

An Algebraic calculation system was included. The Algebraic Expression Reserve (AER) Memory: Frequently used formulas or constants can be stored in memory and recalled for repeated use. The PC-E500 series also performed as a scientific calculator when switched into 'CAL' mode.

It also included an X<>Y exchange key for working with complex numbers and polar to rectangular conversions.


In addition things like amino acids and the periodic table of elements were available. These built-in programs were accessed through a menu system and special function keys. There was also an inbuilt menu editor to add new software to the menus or indeed replace some built-in software or formulas.

Operating Modes[edit]

Mode menu.
  • BASIC (programming and execution)
  • CAL (scientific calculator)
  • MATRIX (matrices calculations)
  • STAT (Statistics)
  • ENG (Engineering)


  • 10 digits (mantissa) + 2 digits (exponent) single-precision mode.
  • 20 digits (mantissa) + 2 digits (exponent) double-precision mode.
  • In the CAL, MATRIX and STAT modes, only the single precision mode can be used.

Memory Expansion[edit]

The Sharp PC-E500 series could store data and programs on Memory Expansion cards as well as the main RAM. Six cards were available.

  • CE-210M 2K
  • CE-211M 4K
  • CE-212M 8K
  • CE-2H16M 16K
  • CE-2H32M 32K
  • CE-2H64M 64K

These card used CR-1616 Lithium battery for backup.

The memory configuration was software switchable from the command-line. The RAM card could be appended to the system memory, replace the system memory or as a separate space to be used as a RAM-Drive (F:). The main memory could also be partitioned off to a RAM drive (E:)



  • CE-126P (de) Thermal printer & cassette interface.
  • CE-140F 2.5-inch pocket floppy drive
  • CE-130T RS-232 adaptor level converter.
  • CE-135T RS-232 adaptor level converter. (Macintosh)
  • CE-515 4-color X/Y plotter printer

The PC-E500S had a weight of 340g (with batteries) and was powered by four AAA batteries. It could, given its power consumption of 0.09 W, be used for about 70 hours on a charge.[2]


  • PC-E500 (English): 32 KB, engineer software, double precision, slipcase, rubber keys, black, 1988
  • PC-E500 (Japanese): 32 KB, engineer software, double precision, Kanji, slipcase, rubber keys, black, 1988[3]
  • PC-E500PJ / PC-E500-BL (Japanese): 32 KB, engineer software, game "HEAVY METAL mini" (by CRISIS Software) preloaded into RAM, double precision, Kanji, slipcase, rubber keys, blue, 1990, limited special edition by Pokecom Journal (PJ)[4]
  • PC-E500S: 32 KB, engineer software, double precision, high contrast display, clamshell, rubber? keys, black, 1989[5]
  • PC-E550 (Japanese): 64 KB, engineer software, no double precision?, Kanji, slipcase, rubber keys, white, 1990[6]
  • PC-E650 (Japanese): 64 KB, engineer software, double precision?, structured BASIC, Kanji, clamshell, plastic keys, 1993[7]
  • PC-1480U (Japanese): 32 KB, no engineer software, "coop uni", Kanji, slipcase, rubber keys, black, 1989[8]
  • PC-1490U (Japanese): 32 KB, no engineer software, "coop uni", Kanji, slipcase, rubber keys, black, 1990[9]
  • PC-1490UII (Japanese): 64 KB, no engineer software, "UNIV. TOOL", Kanji, slipcase, rubber keys?, black, 1991[10]
  • PC-U6000 (Japanese): 64 KB, no engineer software, "UNIV. TOOL", double precision, Kanji, clamshell, plastic keys, black, 1993[11]

See also[edit]