This page was last modified 21:54, 20 January 2021 by Mars2000you. Based on work by Gdx and Rderooy and others.
Gradiente logo



Gradiente is a Brazilian electronic products manufacturer founded in 1964.

Official website:

Although the head office is in the city of Sao Paulo, the production facilities are located far away in the city of Manaus.

The company started manufacturing home audio appliances. By acquiring competing companies and licensing products of foreign manufacturers, they entered in professional audio and video market. The company manufactured audio amplifiers, TV sets, VCRs and CD-Players, cordless phones, cassette players, released under several brands.

In the year of 1983, under the brand "Polyvox", a former professional audio amplifier manufacturer acquired in 1979, they started to make licensed ATARI products for the Brazilian market. It was the only ATARI licensed console maker ever.

In the year of 1985 they started to make MSX computers and peripherals, which had a great acceptance in the Brazilian market. It's believed that 250.000 MSX computers were manufactured by Gradiente, though this number is still unconfirmed.

The Gradiente captive clientele waited in vain for a MSX2 machine, but Gradiente never produced one and discontinued their MSX line by 1991, even though they were selling 80 columns cartridges that contained the MSX2 V9938 VDP.

Between the years of 1993 and 1996 they also sold licensed Nintendo products under the brand Playtronic.

In 1997 Gradiente signed with Nokia for manufacturing cellphones in Brazil, creating NGI Eletrônica. Later, in 2000, Nokia bought Gradiente's 49% share of NGI for 415 million USD.

Gradiente released a Multimedia PC called OZ, which had poor market acceptance.

Since then, Gradiente remained active in the manufacturing of smartphones, tablets and set-top boxes, more recently being remembered for the struggle with Apple over the "iPhone" brand.

Gradiente has registered the "iPhone" brand for Brazil in 2000 as "Internet Phone", although no related products were released. By considering this factor, the judge ruled in favour of Apple.



Model Year Region Model Year Region
MSX1 Gradiente Expert DDPlus 1989 BR Gradiente Expert Plus 1989 BR
Gradiente Expert GPC-1 1987 BR Gradiente Expert XP-800 1985 BR


Product Description
Gradiente JS-1 Joystick
Gradiente JS-2 Joystick

Network and I/O Interfaces

Product Description
Gradiente CT-80NET RS-232C interface + 80 column adapter
Gradiente DM-1 Modem
Gradiente TM-1 Telecom modem
Gradiente TM-2 Multimodem


Product Description
Gradiente DR-1 Data recorder


Product Description
Gradiente CT-80E 80 column adapter with built-in editor
Gradiente CT-80NET RS-232C interface + 80 column adapter
Gradiente MBW-12 12" green monochrome monitor
Gradiente TA-1 RGB to composite video/RF adapter