(Free42) tips & tricks: local flags

[Vincent Weber]

From HP key notes V6N2, may 1982:
"The new HP-IL Video Interface is all that is needed if you want just a convenient way to output data and programs in video. The HP-41 printer commands in this new module will allow all normal character output to occur in a very friendly manner. Flags 15 and 16 in the HP-41 will control the PRINT (output) mode to the video display. For example, when flag 15 is SET, it will make the video display act like a printer in TRACE mode; and when flag 16 is SET, it will make the video display act like a printer in NORMAL mode. And, when both flags are SET, they will put the video display into a new "TRACE WITH STACK OPTION" mode that will cause stack registers X, Y, Z, and T to be "printed" (displayed) after each operation. Now you'll be able to "see" how you left the stack and what is in it! (Very nice, yes?) Finally, with both flags CLEAR, the video display will be in MANUAL mode. "