Reading Private Program Cards - HP 82104A Owner's Handbook Manual

18 Card Reader Operations
When vou execute the function, either in a program or from the
keyboard, the HP-41C prompts you for the card with
CARD
If more than a single track is required to read the complete program, the
HP-41C prompts for each subsequent track with the standard prompt.
RDY kk OF nn
Again, you can insert the tracks in any order and the HP-41C will always
prompt you for the lowest numbered track not yet read.
Program Operation. When executed by a program, the simply
halts program execution, prompts for the cards, and when the read
session is complete, execution resumes with the line following the [rsue).
You can construct ALPHA prompts in your programs that appear in the
display instead ofthe initial CARD prompt. Here is an example:
01 LBL ABC
02TINSERT CARD
03 AVIEW
04 RSUB
The display will show |NSERT CARD instead of the standard prompt
when the is executed. After the first track of the card is read, all
subsequent tracks read are prompted by the RDY kk OF nn message.
Reading Private Program Cards
The procedure for writing private program cards is given on page
13. Once a program is written to a card using (wPrv], that program
cannot be viewed, altered or re-recorded onto another card through
normal operations.
To read a private program card, simply set the HP-41C to normal or
USER mode, press g (*J (] and insert the card. The HP-41C
prompts you for additional tracks when required just like with non-
private program cards.