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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.
 Sharp PC-E500S in RUN mode (BASIC programming) | |
| Type | Pocket computer |
|---|---|
| Introduced | 1995 |
| Discontinued | 2003 (last known production run so far: 2001) |
| Predecessor | Sharp PC-E500 |
| Calculator | |
| 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 |
| CPU | |
| Processor | Sharp SC62015 |
| Frequency | 2.304 MHz |
| Programming | |
| Programming language(s) | BASIC |
| User memory | 32 KB (built-in), custom-expandable to 256 KB |
| Firmware memory | 256 KB |
| Interfaces | |
| Ports | 1 vendor-specific (serial/printer/disk drive) 1 TTL-level serial communications port |
| Other | |
| Power supply | 4× AAA 1× CR2016 |
| Power consumption | 0.09 W |
| Weight | 340 g (including lid and batteries) |
| Dimensions | 22×10.45×1.9 cm (lid closed) |
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 (Multiline IF ... ENDIF, WHILE ... WEND, REPEAT ... UNTIL, SWITCH ... CASE ... ENDSWITCH)[1]
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 that contained the BIOS, a diagnostic suite,[2] and the BASIC interpreter used to program the device.
An algebraic calculation system was included. The Algebraic Expression Reserve (AER) memory: Frequently used formulas or constants could 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 a built-in menu editor to add new software to the menus or indeed replace some built-in software or formulas.
The Sharp PC-E500 series could store data and programs on memory expansion cards as well as the main RAM. Six cards were available:
These cards used a CR1616 lithium battery for memory 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 act 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:).
The PC-E500S had a weight of 340 g (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.[3]
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