AS-1000

The AS-1000 was a Brazilian clone of the Sinclair ZX81 introduced by Engebrás Eletrônica e Informática Ltda in October 1983.^{[1][2][3][4][5][6][7][8]} The main differences regarding the ZX81 are the internal power supply and larger RAM. The machine had an initial retail price of Cr$ 195 000.^[3]

Manufacturer	Engebrás Eletrônica e Informática Ltda
Type	Home computer
Release date	October 1983; 42 years ago (1983-10)
Introductory price	Cr$ 195 000
Operating system	Sinclair BASIC
CPU	Z80 at 3.25 MHz
Memory	16 KB (64 KB max.)
Display	Monochrome display on television; 24 lines × 32 characters; 64 × 48 pixels semigraphics mode
Backward compatibility	ZX81

The computer came with 16 KB of RAM, but could be fitted with 32 or 48.^[1] There were 8KB of ROM and a 40-key membrane keyboard.^[1][9] A regular TV set was used as monitor, with the computer displaying 32 x 22 text characters in monochrome. By using semigraphic characters, it was possible to simulate a 64 x 44 resolution display.

There was one expansion slot at the back of the machine, with the TV RF-out, audio in/out and joystick ports located at the side.^[4][10][1] Storage was by means of audio cassette, with a data transfer speed of 300 bauds.