HP97 The journey begins

[teenix]

Hi all,

Still working on the 19C. My son has asked me to help him out nearly every day lately, so I haven't had much spare time.

I've implemented these new program steps. None of the HP microcode has been altered, it still does its thing, but my code monitors it while running and changes data here and there. The key sequences (or program steps as text) are listed on the display and the printer prints the new steps. [f][f] is used as a prefix because there are no spare key functions on the 19C.

[f][f][0] RAND
[f][f][1] CONS
[f][f][2] BEEP
[f][f][3] DATS
[f][f][4] FILE

RAND
generates a random number >=0 and < 1

CONS
allows constant storage and recall - 10 constants max

BEEP
sounds the beeper once

DATS
swaps the Primary and Secondary memory
14 registers total, Primary 0 (I register) and Primary 1 stay as is.

FILE allows 3 functions to access any of the 400 storage locations
load a program file from memory, then start from the program beginning or from LBL 0 - 9
load a data file into Primary memory
save Primary memory to a data file
this should provide a lot more steps and storage memory to play with.

There could be up to 8 errors generated during a FILE command, like trying to load an empty file etc. If one occurs, the HP microcode does its normal error thing and the error number is displayed as well, similar to Spice. Eg "Error 7"

cheers

Tony