You can buy a new 6502 processor from the company Mouser Electronics. The original 6502 was the CPU in computers from Commodore, Apple, BBC, Acorn, Atari, Coleco, Dragon etc. The new version is pin compatible with the original, but the clock frequency is now 14 MHz. There are also new instructions added: BBR, BBS, BRA, PLX, PLY, RMB, SMB, STP, STZ, TRB, TSB and WAI.