Sharp PC-G850V
The Sharp PC-G850V is a handheld computer from the Sharp company . It is possibly the last model of its kind and, like its predecessor models, was produced for the Japanese education market. It is the direct successor to the Sharp PC-G850S and belongs to a line of pocket computers with Z80 processors that began with the PC-E200. The PC-G850V has an alphanumeric keyboard and a graphic LC display with 144 × 48 pixels, on which six lines of text can be displayed and which offers a higher contrast compared to the previous models. A Z80-compatible processor with 8 MHz clock frequency works in the computer.
Equipped with all the usual functions, the device can initially be used like a scientific pocket calculator. In addition, programs can be written in the programming languages BASIC , C , CASL and Z80 - assembler , which are stored in the 32 KB static RAM. C and assembler programs are created in a text editor (TEXT mode) and can then be compiled or assembled. A simple hex monitor can be accessed from the BASIC system, which also provides a print function and the option of loading or sending machine programs via the serial interface. When compiling C programs, no machine code but a byte code is generated, which is then interpreted at runtime. The BASIC interpreter has a relatively extensive set of commands, including graphics and file functions. However, the piezo loudspeaker common in earlier devices is missing for sound generation using BEEP. The connections originally intended for this can be found on the main board of the computer.
As a special feature, the 256 KB ROM contains a PICmicro assembler which, in conjunction with additional hardware, enables the programming of PIC processors. The PC-G850V has an 11-pin interface on the left side of the housing, on which classic accessories such as the thermal printer CE-126P can be used. In addition, a serial RS-232 interface with CMOS level is integrated here (as has already been the case with the models of the PC-E2xx series) which, when using a suitable level converter or a USB interface, enables data exchange with a PC or Mac with up to 9600 baud enabled.
In addition, the interface can be configured as an 8-bit PIO and is also used to connect a PIC burner. A 40-pin system bus is available on the right side of the housing, which enables the connection of optionally available or your own system expansions.
Technical specifications
| CPU | Z80 with 8 MHz, 8-bit CMOS |
|---|---|
| R.A.M. | 32 KB static RAM, battery protected |
| ROME | 256 KB |
| programming language | BASIC, C, CASL, Z80 assembler , PIC assembler |
| Display | Graphic, six-line 24 characters or 144 × 48 pixels, monochrome LCD |
| Keyboard layout | QWERTY |
| Power supply | 4 × R03 1.5 V cells |
| Power consumption | 6.0 V DC at about 0.2 W. |
| Dimensions | 195 × 95 × 20 mm (without cover) |
| Weight | 336 g (including batteries and cover) |
Picture gallery
Sharp PC-G850V with PIC burner
Sharp PC-G850V with PIC burner and PIC application board
Web links
- Information on the PC-G850V (English)