10 Sep
2014
10 Sep
'14
8:10 p.m.
On Sep 9, 2014, at 2:02 PM, Tony Duell <ard at p850ug1.demon.co.uk> wrote:
hre are actualyl at least 3 RS232 interfaces for this machine. The 11205
is a half-duplex hardware device which could certainly be used ot drive a
terminal. The 11206 is a bit-banged one, and is pretty much useuless from
BASIC. The 11284 is a very nice hardaare device with synchronous mode too
(but good luck in finding one).
If I was to consider non-origianl hardware I could add a little circuti
to the built-in pritner interfce (Whcih is a paralell port simialr in
concept to Centronics) to output to a serial terminal.
I don't think there's any way to make the HP9830 use an external termianl
for the consle, but you can certainyl send/reciever data to a seiral port
Hang on though... An HP9830 + HP59405 HPIB
interfce should eb able to
tlak to an HP1350 'Graphics Translator' That would give it a vector
display. Given you only need a couple of keys for input, perhaps a few
sense switched wired up to a parallel interface unit would do. Now tht
would be an interesting project, but not one that owuld take a week?
Is there no way to interface a terminal to it and have the BASIC send
its output to the terminal, and then read from the terminal? Then all
you?d need to do is send the right cursor codes. from within a program (although you need an Extended
I/O ROM for many
applicaitons).
Maybe that would eb the simplest solution, althoguh it would involve
non-HP hardware i think.
-tony