Where to begin piece of hand held history? The Neo Geo is a fifth generation console that was originally released in Japan in late 1998 and it’s performance was so bad that it was discontinued in 1999, it doesn’t say when in 1999 so there is a good chance it lasted less than a year before being discontinued. It was however succeeded by the Neo Geo Colour and this was only release in Japan and Hong Kong. Having only a short life it was host to some significant titles, Samurai Showdown and King Of The Fighters R-1 for example. Titles released for it include: Puzzle Link, Pocket Tennis, Neo Cup 98 plus, King of Fighters, Samurai Showdown, Neo Cherry Master, Baseball Stars. It was mostly forward compatible meaning that it could play most of the newer colour games. Although notable exceptions were Sonic The Hedgehog Pocket Adventure and SNK Vs. Capcom: Match Of The Millennium. The newer Neo Geo Pocket Colour was fully backward compatible and can play all games released on the Neo Geo Pocket. It has only in and around eighty-five titles available for it and that includes all regions of game release. Which a list of can be seen here: en.wikipedia.org/wiki/List_of_Neo_Geo_Pocket_Color_games
16 bit TOSHIBA TLCS-900H high performance core CPU 32 bit/16 bit register bank configuration at 6.144 MHz Virtual screen 256×256 - 16 palettes/plane, 64 sprites/frame Z80 8 bit cpu sound 12 bit DAC & 6 PSG tone simultaneous output I/O serial SIO 1 channel 19200 bit/s
It retailed at $69 and there were 2 million units sold.