Sistema 700

Sistema 700 was a personal professional microcomputer, introduced by the Brazilian computer company Prológica in 1981.^[1][2][3][4]

Sistema 700

Manufacturer	Prológica
Type	Microcomputer
Release date	1981; 44 years ago (1981)
Introductory price	US$399 (equivalent to $1,380 in 2024)
Discontinued	1985; 40 years ago (1985)
Operating system	DOS-700 (CP/M 80)
CPU	2x Zilog Z80A @ 4.0 MHz
Memory	64 KiB RAM
Storage	Audio cassette, Floppy disk
Display	80 × 24 characters text display; 12-inch monochrome CRT; PAL-M video out (built-in RCA connector)
Connectivity	Two RS-232 serial ports

General information

The machine was based on the Intertec Superbrain and had similar characteristics:^[5][6] based on the Zilog Z80A 8-bit, 4MHz microprocessor, it had 64 KiB RAM configuration and two 51⁄4-inch floppy disk drives with capacity for up to 320 KiB of storage.^{[7][8][9][10]}

Its operating system was DOS-700, a version adapted by Prologica's software engineering department from the CP/M-80.^[11][12]

It achieved relative commercial success in financial, database and engineering applications. Due to the compatibility with the popular CP/M system, various applications like Fortran ANS, BASIC compiler, COBOL ANSI 74 compiler, Algol, Pascal, PL/I, MUMPS/M, RPG, Faturol C could be used. Other applications like word processors (WordStar), spreadsheets (CalcStar) and databases (DataStar and dBase II) were also compatible. Your applications could be programmed in BASIC, Cobol-80 and Fortran.^[7]

Models

The third generation Sistema 700, named Sistema 700 Modular

Sistema 700 (1981)

Initial model announced in 1981, but never went into production (vaporware).^[1]

Super Sistema 700 (1981)

Final version with graphite-colored cabinet and rounded contours.^[1]

Sistema 700 Modular (1985)

In August 1985, Prológica released the third generation of the Sistema 700, named the Sistema 700 Modular. It had a larger and more durable keyboard, a built-in magnetic disk, and 10 function keys . It had 64 kilobytes of RAM and 4 kilobytes of EPROM storage. It was equipped with three microprocessors, one of which, an Intel 8035, was dedicated to controlling the keyboard. It was 10% cheaper than the previous model.^[13][14][15]

Data Storage

Data storage was done in audio cassette.^[7] Audio cables were supplied with the computer for connection with a regular tape recorder.^[7]

Accessories

P-720 Printer.^[16]

Bibliography

• Micro Computador – Curso Básico. Rio de Janeiro: Rio Gráfica, 1984, vol. 1, pp. 49–50.