When I went to school there was a seperate course for PDP-11 assembly language, another was then already using Z-80s (ooh, aah) with HP emulators. I LOVED it! -----Original Message----- From: Alan B Pearce [mailto:A.B.Pearce@RL.AC.UK] Sent: Thursday, April 20, 2000 1:43 AM To: PICLIST@MITVMA.MIT.EDU Subject: Re: [OT] Ah yes those were the days (but this is now)... >I think it used a 12 bit word? The PDP11 family were all 16 bit words. The earlier PDP8 family used a 12 bit word.