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The X-Philes (2nd Revision)
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The X-Philes Number 1 (1995).iso
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hp48hor2
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iotest.doc
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1995-03-31
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Author: hpfcso.FC.HP.COM [Ray Depew]
Date: Thu Dec 19 1991
In comp.sys.hp48, robf@mcs213g.cs.umr.edu (Rob Fugina) writes:
> I just bought the serial interface kit, and I can't get anything to work!
> I set the right port, speed, and parity on the computer, and I set the
> 48 to wire, ascii, and the same baud and parity as the computer. Nothing
> seems to happen! The only thing that I can get to happen (sometimes) is
> when the computer is in terminal mode and I put the 48 in server mode,
> the computer will receive 4-6 characters (that I recognize as the 48
> telling the computer it's in server mode). Is there any way to test the
> connection? Does the computer's com port need to be set for DCE or
> something??? HELP!!!!!!!!!!
>
> Rob robf@cs.umr.edu
1) To test the connection without Kermit getting in the way, type "connect"
at the 'Kermit >' prompt on your computer, or use a dumb terminal.
a) To test the computer->48 connection:
- press OPENIO on the 48.
- type HELLO on the computer and press RETURN/ENTER/whatever.
- press BUFLEN on the 48 (last pg. of the I/O menu).
- you should see two numbers on the stack.
Level 1 is a flag: 1 := data transferred o.k.
2 := framing error or UART overrun
Level 2 is the number of characters received from the computer.
- press DROP to remove the flag and put the # of char's into Level 1.
- press SRECV on the 48 (last pg. of the I/O menu).
- you should see two numbers on the stack.
Level 1 is a flag: 1 := data transferred o.k.
2 := unsuccessful receive. (press ERRM for
more detail)
Level 2 should be the string received from the computer.
b) To test the 48->computer connection:
- (Assuming you already pressed OPENIO)
- put a string like "HI BACK" on Level 1 of the 48.
- press XMIT on the 48 (last pg. of the I/O menu).
- if data transfer is successful, you will see a 1 on Level 1.
- if part of the string failed to transmit, you will see a 0 on
Level 1 and the unsent portion of the string on Level 2.
2) Remember to press CLOSEIO when you've finished.
Regards
Ray Depew
Hewlett Packard Co, Fort Collins, Colorado
rrd@hpfitst1.fc.hp.com