31 Aug
2007
31 Aug
'07
5:57 p.m.
On 31 Aug 2007 at 23:04, Tony Duell wrote:
Had it beren mine, I think i'd have made up a bit
of hardware to sort the
handshakes out, and set the plotter to 'Listen Only' mode (I think all
real HP ploters can be set ot do that). The PC would then certianly have
been none-the-wiser.
It took me exactly two evenings to work this out--one to work out the
cable and the second to write the TSR. I'd already converted my MDA
card for bi-directional operation, so it was pretty much a no-
brainer. The project came in handy a few months later when a friend
showed up on my doorstep with an HP GPIB-interface voltmeter and
wanted to know how to get the data into his PC. ISA GPIB host
adapter cards were available, but expensive.
I believe one odd aspect of the GPIB plotter that I used was that it
supported fewer commands than the serial version. All of that HPIB
protocol must've taken extra ROM space. Fortunately, Supercalc
didn't use the added command set, so I was fine.
Cheers,
Chuck