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+--- Thread: HP-67 Card Operation Query (/thread-12562.html)
HP-67 Card Operation Query - teenix - 03-05-2019 12:21 PM
Hi All,
Can anyone help with a spare few moments and a working HP67 card reader?
While a program is running, you can position a card in the card reader slot ready to start reading during a Pause instruction. The motor switch will be tripped, but because the program is running it will be ignored until the Pause instruction executes.
I was playing with the 67 emulator and if I write a simple loop program like...
LBL A
7
Enter
Add
GTO A
If I press R/S to halt the program, the card is read into memory.
Just trying to find out if this is how a real 67 works?
cheers
Tony
RE: HP-67 Card Operation Query - Thomas Okken - 03-05-2019 12:57 PM
Yes, that is how the real 67 behaves. When program execution stops because of a PAUSE or R/S instruction, a RTN with no pending GSB, an overflow, or being interrupted by pressing R/S, the card will be read. When program execution stops because of an Error, the card is not read until the Error is cleared.
RE: HP-67 Card Operation Query - teenix - 03-06-2019 12:39 AM
(03-05-2019 12:57 PM)Thomas Okken Wrote: Yes, that is how the real 67 behaves. When program execution stops because of a PAUSE or R/S instruction, a RTN with no pending GSB, an overflow, or being interrupted by pressing R/S, the card will be read. When program execution stops because of an Error, the card is not read until the Error is cleared.
Awesome
Thanks for your effort :-)