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+--- Thread: Hp 65 user diagnostic program (/thread-9862.html)
Hp 65 user diagnostic program - Harald - 01-05-2018 10:19 PM
On the 65 the user diagnostic program looks different from other programs when viewed in w/prgm mode. It shows a "-" after the key codes. I wonder why it looks like that. Can anyone explain?
I started wondering when I compared an original 65 with Tonys emulation. On Tonys emulation there is a space on front of the"-", on the original there isn't.
Here is a picture:
![[Image: img_20180105_224146n7qro.jpg]](https://abload.de/img/img_20180105_224146n7qro.jpg)
RE: Hp 65 user diagnostic program - Dieter - 01-05-2018 10:26 PM
(01-05-2018 10:19 PM)Harald Wrote: On the 65 the user diagnostic program looks different from other programs when viewed in w/prgm mode. It shows a "-" after the key codes. I wonder why it looks like that. Can anyone explain?
I cannot say much about the HP65 diagnostics program, but the "-" on the HP65 is displayed when all 100 steps are occupied so that adding one more step would delete another one. Delete one step and the "-" disappears.
Dieter
RE: Hp 65 user diagnostic program - Harald - 01-05-2018 10:38 PM
(01-05-2018 10:26 PM)Dieter Wrote:(01-05-2018 10:19 PM)Harald Wrote: On the 65 the user diagnostic program looks different from other programs when viewed in w/prgm mode. It shows a "-" after the key codes. I wonder why it looks like that. Can anyone explain?
I cannot say much about the HP65 diagnostics program, but the "-" on the HP65 is displayed when all 100 steps are occupied so that adding one more step would delete another one. Delete one step and the "-" disappears.
Dieter
Ah, that's clever. Thanks for enlightening me!
Are there different rom versions that display the - in different positions?
RE: Hp 65 user diagnostic program - rprosperi - 01-05-2018 11:11 PM
(01-05-2018 10:38 PM)Harald Wrote: Ah, that's clever. Thanks for enlightening me!
Are there different rom versions that display the - in different positions?
The minus signs are explained at the bottom of p. 58 in the '65 Owner's Manual. a 2nd one is also shown on the left edge when at the 'bottom' of memory (step 100)
Thanks to Dieter for this (apparently) long-forgotten fact.