Changes

along with '''Olympiade''', '''Companion II''', '''Concord I, II''' and '''Electronic Chess Mark 8''', a series of [[Saitek|SciSys]] [[Dedicated Chess Computers|dedicated chess computers]] released from 1983 to 85.

The computers had the [https://en.wikipedia.org/wiki/Hitachi Hitachi] [[6800|HD6301V1]] [https://en.wikipedia.org/wiki/Microcontroller microcontroller] with 4 Kibi [[Memory#ROM|ROM]] and 256 byte [[Memory#RAM|RAM]] in common, running the [[6800]] branch of the [[LogiChess]] program by [[Kaare Danielsen]] at a [https://en.wikipedia.org/wiki/Clock_rate clock frequency] of 3.6 resp. 7.2 MHz.

The SciSys Explorer was Danielsen's '''first''' commercial LogiTech release <ref>[https://www.schach-computer.info/wiki/index.php/Danielsen,_Kaare Danielsen, Kaare] from [https://www.schach-computer.info/wiki/index.php/Hauptseite_En Schachcomputer.info Wiki]</ref>,

running at 3.6 MHz. The Explorer had an integrated travel sensory pegboard, while the other models were tabletops with press [[Sensory Board|sensory boards]].

The '''Companion II''' ran at 7.2 MHz and had [[Pondering|permanent brain]] implemented. The computer was released in 1984.

=Concord=

The rare '''Concord''' ran at 3.6 MHz, the '''Concord II''', released in 1985, at 7.2 MHz with [[Pondering|permanent brain]].