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M > MICROACE > MicroAce     


MICROACE
MicroAce

A few months after Sinclair released its ZX-80, Microace of Santa Ana, California launched a clone of this computer.

It was exactly the same machine, but a minor modification made that it could be expanded to 2 KB of RAM.
The internal ROM was also a pure copy of the Sinclair's original. Sinclair thus sued Microace but met with large difficulties because the judge couldn't seee the ROM content!
Sinclair eventually won because the Microace keyboard was also identical to the ZX-80's and the judge could see it...

Microace then ceased the production of the 4 KB ROM machine but made later an agreement with Sinclair for a licenced version of the ZX-81 to be put on sale only in kit form and only in the USA. Microace also made a 'flicker-free board' for the ZX-80.

We need more info about this computer ! If you designed, used, or have more info about this system, please send us pictures or anything you might find useful.
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My first computer, built it from the kit. lot of soldering of chip sockets, resistors, etc. When I first connected it to my TV and turned it on WOW! I was in the computer age! Type in a basic program, save it to cassette tape and you could play it again and again. Hamurabi was one of my early favorites. Great memories!

          
Tuesday 16th August 2011
Joe Sangemino

My first computer was a Microace. The keyboard was always trouble. I built it into a homemade case using an Atari 800 keyboard. I also added the flicker free board and upgraded the ROM. That made it essentially a ZX-81 or Timex 1000.

          
Monday 12th March 2007
John Mullen (USA)

 

NAME  MicroAce
MANUFACTURER  Microace
TYPE  Home Computer
ORIGIN  U.S.A.
YEAR  1980
END OF PRODUCTION  1981
BUILT IN LANGUAGE  Sinclair Basic
KEYBOARD  Membrane keyboard, 40 keys, 1 SHIFT key
CPU  Z80
SPEED  3.25 MHz
RAM  1 KB, 901 bytes available (up to 2 KB on board)
ROM  4 KB
TEXT MODES  32 chars. x 22 lines
GRAPHIC MODES  64 x 44 dots
COLOrsc  Monochrome
SOUND  None
I/O PORTS  Z80 Bus, tape, TV/RF video
POWER SUPPLY  9v DC, external PSU
PERIPHERALS  16 KB RAM extension
PRICE  Unknown





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