> -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Chuck Harris > Sent: Wednesday, February 20, 2008 8:12 PM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] favorite microcontroller module? > > Bob Paddock wrote: > > On Wednesday 20 February 2008 11:53:23 am Chuck Harris wrote: > > > >> I doubt it, the audience of these two devices is quite different. > >> The 6805 family could address 64K external RAM/ROM/IO. > > > > Not sure what device you are describing, but it is not a 6805. > > I had thought it did, but looking on google it appears that > it has a fixed RAM and ROM space... rather capacious compared > to my usual needs. >
There was ONE variant of the 68HC05, the original CMOS (as opposed to the NMOS 6805) which had an external address and data bus. It came in a 40 pin DIP package. I never used it but I saw it in equipment I was working with at the time. It had a few instructions that the NMOS parts did not have, but it was supplanted by the HC05. Didier KO4BB No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.20.9 - Release Date: 2/20/2008 12:00 AM _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.