HP HP-65 - Page 8

through your program, use in W/PRGM
mode (See 156). You will see the successive pro-
gram codes in the display. = To insert a step
below the currently displayed step, just key in
the new operation in W/PRGM mode. (See
132). To delete a step or correct a mistake,
press 8 in W/PRGM mode (See 121).
Both overflow and underflow of a register will
stop a program.
1110. Using Magnetic Cards
Reading a Pre-recorded Card. = Set
W/PRGM-RUN switch to RUN. = Insert the
card in the right lower slot, = If the card does
not read properly, display will flash and program
memory will be cleared (but, with no effect on
registers). Press and reinsert the card.
Recording (Writing) on a Program Card. =
Set W/PRGM-RUN switch to W/PRGM. =
Insert unprotected (unclipped) card in right
lower slot. = Protect the card by clipping the
notched corner.