http://www.youtube.com/watch?v=OArZ9N0Ptg8
>Oops, I lied... Each 4-bit word represented a decimal digit between 0 and NINE >(1001), not 10. Jeez, I feel like a dufus! > >If we cannot afford to take care of Veterans, then we should stop making >them. >David C. Wilker Jr. >USAF (RET) > > ----- Original Message ----- > From: David Wilker > To: [email protected] > Sent: Thursday, December 03, 2009 9:33 PM > Subject: Re: kibimebigibi and Original Mac/UBUNTU > > > >The IBM 1620 used decimal arithmetic with 4 bit bytes limited to digits > 0-9 and plus and minus signs and what was effectively a space marking the end >of a number. It was called BCD coding. > > I used to teach Binary Coded Decimal to my students. It was basically > a shortcut, half Binary and half Decimal. You had four-bit words, but > they were only 0-10 (0000 - 1010) > > If we cannot afford to take care of Veterans, then we should stop making > them. > David C. Wilker Jr. USAF (RET) > On Thu, Dec 3, 2009 at 18:24, WhyOSX <[email protected]> wrote: > > Yes, 360 was the system they sent the Apollo project up with. > > The other IBM things are unknown to me. > > Born in '63 I've seen an after WW II world - > > we'll have to learn, always have to... > > > >>My first machine was a Control Data 1604 in 1961. Six bits per byte and 7 > >>track tape with a bit for odd parity. Programming was done in octal. All >caps Mine was a Sharp MZ80MB, CPM.2.2, twenty years later, but with datasette (not with the big one tape drives), and 5,25" drives. But this was really a different time... > >>RYRYRYRYRYRYRYRYRYRYRYRY -- ----- You received this message because you are a member of the Vintage Macs group. The list FAQ is at http://lowendmac.com/lists/vintagemacs.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to [email protected] To leave this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/vintage-macs Support for older Macs: http://lowendmac.com/services/
