Maybe the 8008? Not the 8080. As I already posted the 8080 would turn into a simple counter when it saw all ones (FF hex) as an instruction. Truly. we used to removw the EPROMs to debug the address bus on the Q8000 FDM (Functuonal Data Module) we built for INTEL to test the 8080s they manufactured. We (Megatest ) sold INTEL hundreds of these units, and eevery single one was tested this way. I know. I tested 90% of them.
Eric Thompson S/V Procrastinator South San Francisco [email protected] ----- Original Message ----- From: "Walter Knopf" <[email protected]> To: <[email protected]> Sent: Saturday, February 19, 2011 6:29 AM Subject: Re: [Liveaboard] Punch tapes > The byte size instructions and addresses were expressed in octal, so the > eight bit RST7 was 377 as compared to FF in hex. > This was the early 8080 from Intel as used on the Altair computer. Intel > later switched to hex. > > >> PDP-11 or something like that, I take it? > > Whoops - of course not. You'd already said it was an Intel chip. The > "octal" > part had me confused; I'd never heard of an Intel CPU that had a 12-bit > word. You may well be mistaken about that. Intersil, possibly? > > > Ben > > > _______________________________________________ > Liveaboard mailing list > [email protected] > To adjust your membership settings over the web > http://liveaboardonline.com/mailman/listinfo/liveaboard > To subscribe send an email to [email protected] > > To unsubscribe send an email to [email protected] > The archives are at http://www.liveaboardonline.com/pipermail/liveaboard/ > > To search the archives > http://www.mail-archive.com/[email protected] > > The Mailman Users Guide can be found here > http://www.gnu.org/software/mailman/mailman-member/index.html _______________________________________________ Liveaboard mailing list [email protected] To adjust your membership settings over the web http://liveaboardonline.com/mailman/listinfo/liveaboard To subscribe send an email to [email protected] To unsubscribe send an email to [email protected] The archives are at http://www.liveaboardonline.com/pipermail/liveaboard/ To search the archives http://www.mail-archive.com/[email protected] The Mailman Users Guide can be found here http://www.gnu.org/software/mailman/mailman-member/index.html
