HP86 problem

[vassilisprevelakis]

(07-04-2019 07:12 PM)rprosperi Wrote:  Actually, HP BASIC (and likely many others, but I don't have access to them to check) allows commands such as "3 + 3 [END LINE]" as valid, as there is an implied DISP command inserted by the OS. So typing that should return 6.

Yes this is true. In fact the Series 80 keyboard has a key (RESLT) which brings up the result of the previous calculation.

So 3+3 ENTER
gives 6
if you then press RESLT you will get 6 inserted at the cursor position.
Very useful for quick calculations.

I believe that the 9825 also had this facility with the added bonus that you could do calculations while the computer was running a program (live keyboard).

Anyway back to the HP-86. What prompt do you get? Have you tried running other commands to see if BASIC is present? Maybe there is some other ROM that is interfering with the boot process. Is there anything connected to the expansion slots in the back?

Some pictures of the unit will definitely be useful.

**vp

http://www.series80.org