5.25 286 486 3020 amstrad apple apple 2 apple ii auction basic chip chips commodore compaq computer computer chips controller cp/m dec dos ega eisa et-3400 everex flash floppy for sale future games gridcase gwbasic ibm isa kansasfest kaypro kfest laptop mac macintosh manual memory microsoft modem monitor msx2 network omnibook pdp-8 pentium portable powerbook ps/2 s-100 sale sell serial terminal sharp software spectrum tandy terminal trade trs-80 vga vintage wang wanted windows working z80