On Fri, Mar 10, 2017 at 5:15 PM, Jay West via cctalk <cctalk@classiccmp.org> wrote: > Local electronics place has a HP 9815A for sale, the appearance from a 10 > foot distance was "fair" or slightly less than fair condition. If someone is > serious about it, let me know and I'll inquire further. >
No I don't want to try and get it over here... This machine is interesting from at least 2 respects. It is, IMHO the only HP desktop machine to be truely RPN. It has the 4 level stack with automatic lift/drop like the handhelds. The older HP desktops with the 3 level stack (9100, 9810) don't have automatic lift and drop so in my opinion are not true RPN machines. The other interesting aspect is that this is the only HP desktop calculator (as opposed to computer) to use a standard microprocessor. Earlier machines used a TTL-based bit-serial thing, slightlty later ones (HP9825, etc) used an HP custom processor. But the 9815 has a 6800 in it. -tony
