[rescue] Scoop on IBM Dials and Buttons boxes?
ttlchaos at randomc.com
Fri Feb 22 20:42:11 CST 2002
On Thursday 21 February 2002 04:03 pm, you wrote:
> I just finished tracing the interface out, and I believe I can say
> with certainty that it's capable of RS232. The units I came
> across have a 9-pin mini-din connector on the back.
What? Try 8-pin. The tablet ports and the ports on the Graphics Input
Adapter all have 8 pins, not 9.
> I traced out the wiring, and pins 2 and 3 of the DB25 go to the
> appropriate I/O pins on the Max232 chip. DCD, CTS, and DSR are
> tied high via 2k resistors, so they apparently don't use any
> sort of hardware handshake.
No offense, but I wonder why you went through so much trouble when I've so
far found the tablet port and the GIA port listed in the IBM manuals. For
anyone who doesn't know, the "Adapters, Devices and Cable Information" book
for MCA devices is a wonderful reference. I found tablet port pinouts for my
7012 in the service guide at work, though I never did that one book through
digging on the web. This is what I have:
Tablet port on 7012
2 dc return (Gnd)
5 RX from device
6 TX to device
Graphics Input Adapter MCA card (Type 6-1, FRU 22F9758)
1 Signal Return
2 DC return
4 Selective reset to device
5 RX data from device
6 TX data to device
7 Diagnostic selective reset from device
The GIA runs at 9600 bps, either 5,6,7 or 8 bits per character.
> I suspect that
> they could probably plug into a "special" mini-din port on the
> back of an RS6000 which may have supplied power along with data,
> or they could be used with other IBM systems via the RS232 cable
> and a power brick adaptor.
Precisely. There was a feature that came out after these things had been out
that has an 8-pin mini-DIN on one end and a DB-25 on the other. There is a
six-pin header, presumably for +5Vdc. Supposedly, there was a monitor (6091
or 6093, can't remember) that had a power output for these kinds of devices.
The tablet port provides +5Vdc as well.
> Again, any info would be appreciated on the command set for this
> critter. I'll know if it responds to "h", "?" or any other typable
> character :-) in a day or so, soon as I rig up a power supply.
I'm still digging this up. In fact, I found my Dials at work and hooked it
up to a 7012-390's tablet port, loaded tons of filesets, but could never get
it to be found. I also tried the serial adapter but of course I didn't have
the +5vdc input, so it would likely have failed anyway.
My goal is to get the device working under an old copy of Catia and start
tracing RS-232 perhaps.... I am also looking for support directly under
graPHIGS, so tracing could be made easier.
Sridhar -- you might be able to help a little here. I first loaded fileset
devices.mca.edd5.com (Dials/Lighted Program Function Keyboard), but then
found several others that looked useful:
devices.mca.edd5.X11 184.108.40.206 # AIXwindows Graphics Input Ad...
devices.mca.edd5.diag 220.127.116.11 # Graphics Input Adapter and D...
devices.mca.edd5.rte 18.104.22.168 # Graphics Input Adapter Softw...
devices.serial.tablet1.X11 22.214.171.124 # AIXwindows Serial Tablet Inp...
(being installed automatically; required by filesets listed above)
devices.serial.gio.diag 126.96.36.199 # Serial Graphics Input Adapte...
devices.serial.gio.rte 188.8.131.52 # Serial Graphics Input Adapte...
I'm going to check my cables and then try another machine and see if it
detects the dials device. I fear that you may need the LPFK before it'll
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