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The computer has a [[6502]] compatible [https://ru.wikipedia.org/wiki/Sunplus Sunplus] SPLB32A-043 <ref>[https://www.schach-computer.info/wiki/index.php/SPLB32A SPLB32A] – [https://www.schach-computer.info/wiki/index.php?title=Hauptseite_En Schachcomputer.info Wiki]</ref> controller running at 5 MHz with integrated 512 kibi [[Memory#ROM|ROM]], 1215 byte [[Memory#RAM|RAM]], [https://en.wikipedia.org/wiki/Parallel_I/O parallel I/O], [https://en.wikipedia.org/wiki/Universal_asynchronous_receiver-transmitter UART], and [https://en.wikipedia.org/wiki/Pulse-width_modulation PWM]/[https://en.wikipedia.org/wiki/Digital-to-analog_converter DAC] for sound and [https://en.wikipedia.org/wiki/Speech_synthesis speech],
and features a [[Sensory Board|sensory board]] along with a [https://en.wikipedia.org/wiki/Liquid-crystal_display LCD] board, button panel and [https://en.wikipedia.org/wiki/PC_speaker speaker].
The [[Ron Nelson]] program was is a [[6502]] port of his former [[H8]] programs, removing [[Excalibur Mirage#AttackMaps|attack maps]] with respect to available RAM <ref>[http://www.spacious-mind.com/html/ivan_ii_the_conqueror.html Excalibur Model 712 Ivan II The Conqueror (2002) Electronic Chess Computer], [[The Spacious Mind]]</ref>.
=See also=
