> Wasn't the 8089 an I/O chip? > The 8089 was a smart DMA Controller which was able to follow programmed instruction sequences. So you could see it as a very specialized processor. MfG, Do.PE. -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads