HP HP-67 - Page 297

Card Reader Operations 293
These operations are used the same way as part of a program as you
would use them from the keyboard. If you desire to merge data or a
program from a magnetic card into the calculator, a merge instruction,
8 , must be executed as an instruction or pressed immediately
before the magnetic card is passed through the card reader. In
addition, for a merged data load from a card, the proper address
must be first placed in the I-register at some point, whether from
the keyboard or as part of the program.
To use to load a program or data from a magnetic card into
the calculator while a program is running:
1. a. Place an[@ instruction at the point in the program
where you want to load the data or program.
b. If the data or the program from the magnetic card is to be
merged with that in the calculator, insert a B (MERGE] instruction
immediately preceding the [ instruction.
c. If data is to be merged into the registers, ensure that the
proper address number has been placed in I, either from the
keyboard or from the program.
2. Slide the W/PRGM-RUN switch wrram [lll[IruN to RUN.
3. Initialize and run the program.
You may go ahead and insert the leading edge of the first side to
be read into the card reader now, while the program is running.
(Insert the tip of the card firmly into the right card reader slot,
but do not attempt to force the card in. This may take practice.)
You need not hold the card, merely allow it to rest in the card
reader slot.
4. Using a(PAUSE] | when the calculator pauses, the side of the card
you have previously inserted in the card reader slot will
automatically be read during the (PAUSE]. If more data or
program instructions are to be loaded from the card, the
calculator will stop and prompt you with a display of
Crd