HP 85 Serial Interface; INPUT Example?



#2

Hi.
I have been testing the HP85 serial interface. It works nicely as OUTPUT. However, I have been unable to get any input from the PC side to the HP85. Basically I have been playing with ENTER command.

For instance the following simple sentence does not get any input:
ENTER 10;X
However the following output sentence works well:
OUTPUT 10;X
The value of X is printed on the PC side.

I have been playing with different settings (baudrate, flow control,etc) with same result.

Am I missing something here?


#3

Since you seem to have the ENTER and OUTPUT commands available I am guessing you have an I/O ROM, if you do not you will need one.

Make sure you understand the switch setting in the card they will define the default serial port settings, for instance both my serial cards default to 9600,N,8,1 so SW2 1-4=0 and 5-10=1. The switch settings are documented in the 82939A manual.

Set you terminal to match the serial port setting and enable XON/XOFF, as per manual XON/XOFF is highly recommended for input so that you do not overrun the input buffer. When you have done that the terminal program on Pg 34 of the 82939A manual or page 139 of the I/O Programming manual should work. Read the text that goes with it it should give you some hints about input to the serial card. If you don't have the I/O programming manual I would look for a copy online, it has a lot of useful information in it.


Possibly Related Threads…
Thread Author Replies Views Last Post
  DIY HP 30b WP 34s serial flash/programming cable Richard Wahl 2 2,591 12-04-2013, 11:14 AM
Last Post: Barry Mead
  INPUT for HP Prime Eddie W. Shore 3 1,699 11-17-2013, 04:46 PM
Last Post: Michael de Estrada
  HP Prime Tutorial #4 is up (CASE/CHOOSE/INPUT) Eddie W. Shore 1 1,345 11-15-2013, 07:32 AM
Last Post: Davi Ribeiro de Oliveira
  HP Prime Programming Tutorial #3: WHILE, INPUT, KILL, REPEAT, GETKEY Eddie W. Shore 5 2,502 11-07-2013, 12:25 AM
Last Post: Han
  HP PRIME: command to read the SERIAL ? Joseph Ec 9 5,924 11-01-2013, 12:43 AM
Last Post: Joe Horn
  minor visual bug in INPUT Han 0 981 10-03-2013, 01:13 PM
Last Post: Han
  HP48GX Interface to a PC John W Kercheval 7 2,863 09-29-2013, 10:53 AM
Last Post: John W Kercheval
  HP Prime "Symb" interface (bug?) Han 8 2,565 09-13-2013, 12:48 PM
Last Post: Chris Tvergard
  Oldest HP 41c aka earliest Serial Number Gene Wright 23 6,032 09-05-2013, 03:45 AM
Last Post: Geoff Quickfall
  Input syntax on the Prime Gilles Carpentier 6 2,276 08-23-2013, 04:31 AM
Last Post: Gilles Carpentier

Forum Jump: