Re: HP 85 Serial Interface; INPUT Example? Message #2 Posted by Paul Berger (Canada) on 12 June 2013, 11:09 p.m., in response to message #1 by inaki
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.
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