On this episode Man vs Machine : what chess can Teach is about AI warfare. sega replacement console and mini pc and Atari sales and memory ROM/RAM upgrades : rare Japanese retro computers: collector worries SCSI controller for CD TV and Commodore PET repairs : CD drive w controllers and preserving vintage technology Commodore 64, ZX Spectrum, NES, Gameboy Advance, Gameboy Color, Super NES, SNES, Genesis, Neo Geo Pocket Color, and the Nintendo DS.