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'''Excalibur LCD Chess''', (Excalibur 375-1 LCD Computer Chess)<br/>
a [[Dedicated Chess Computers|dedicated travel chess computer]] by [[Excalibur Electronics]], released in 2000 <ref>[http://www.hiarcs.net/forums/viewtopic.php?t=7591&start=8 Chess Products Ron Nelson designed/programmed] by [[Ron Nelson|ChessChallenger]], [[Computer Chess Forums|Hiarcs Forum]], January 11, 2016</ref>.
The computer consists of a [https://en.wikipedia.org/wiki/Samsung_Electronics Samsung] KS57C21516 controller with a [[SAM|SAM47]] 4-bit core <ref>[https://www.digchip.com/datasheets/parts/datasheet/409/KS57C21516.php KS57C21132 Single-chip CMOS Microcontroller]</ref> at 1.5 MHz with 16 KiB [[Memory#ROM|ROM]] and 544 [[Nibble|nibbles]] of [[Memory#RAM|RAM]], and a [https://en.wikipedia.org/wiki/Liquid-crystal_display LCD] board and button panel including the central eight-direction rocker button to [[GUI|interact with the user]].
The program and the new housing was developed and designed by [[Ron Nelson]] during a [https://en.wikipedia.org/wiki/Sabbatical sabbatical] in late 1999 <ref>[http://www.hiarcs.net/forums/viewtopic.php?t=6768&start=108 Ron Nelson] by [[Ron Nelson|ChessChallenger]], [[Computer Chess Forums|Hiarcs Forum]], December 23, 2015</ref>.
The minimalistic 4-bit program performed sophisticated [[PV-Move|PV move]] and [[Killer Move|killer move]] [[Move Ordering|ordering heuristics]] <ref>[http://www.hiarcs.net/forums/viewtopic.php?t=6768&start=102 Ron Nelson] by [[Ron Nelson|ChessChallenger]], [[Computer Chess Forums|Hiarcs Forum]], December 23, 2015</ref>,
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'''[[Engines|Up one level]]'''
[[Category:SAM47SAM]]
[[Category:6502]]
[[Category:Commercial]]
