22 Nov
2006
22 Nov
'06
8:34 a.m.
For the TC08 and similar devices, the issue really
comes down to
the Posibus interface and the Blinkenlights. Both are key features
of the TC08, and both are very pin-hungry.
Lights can be serially multiplexed to an external holding register / light
driver on the panel.
A TC08 on an omnibus card would be useful too.
22 Nov
22 Nov
10:22 a.m.
From: "Al Kossow" <aek at bitsavers.org>
Sure. The TC08 is a Posibus Data Break device, though, and that's 72 pins
right there. There are 67 indicators, 15 connections to the drive, and 41
connections to various non-digital (think Gxxx and such) interfaces, for a
total of 195 "pins".
I also believe the Posibus itself is amenable to multiplexing, with some
latching drivers. There's some work to be done to get the thing down to
a reasonable pin budget for a non-BGA chip, though :-).
These issues come up if you try to push the CPU into an FPGA, too. All
the ones I've seen replace all the cool vintage intefaces with a screen
and a keyboard :-(.
For the TC08
and similar devices, the issue really comes down to
the Posibus interface and the Blinkenlights. Both are key features
of the TC08, and both are very pin-hungry.
Lights can be serially multiplexed to an external holding register / light
driver on the panel. A TC08 on an omnibus card would be useful too.
Nah, you just need yet more Posibus and Data Break cards for your
Omnibus machines :-).
I like Posibus because it works with more of the -8's, and can be
built without hard-to-find receivers and drivers.
Vince
11:02 a.m.
On Nov 22, 2006, at 11:34 AM, Al Kossow wrote:
Duh, I should read to the end of my mail spool before I reply. ;)
This is very much along the lines of what I suggested in my earlier
email, but I was envisioning the two sides of that serial link being
on the same board. Running a nice narrow cable carrying LVDS signals
up to the lamp panel is a very appealing idea.
For the TC08
and similar devices, the issue really comes down to
the Posibus interface and the Blinkenlights. Both are key features
of the TC08, and both are very pin-hungry.
Lights can be serially multiplexed to an external holding
register / light
driver on the panel. A TC08 on an omnibus card would be useful too.
*drooool* Oh yes. :-)
-Dave
--
Dave McGuire
Cape Coral, FL
3:19 p.m.
On 11/23/06, Pete Turnbull <pete at dunnington.plus.com> wrote:
Dave McGuire wrote:
Can I have one too, please? ;-)
If what's envisioned is a way to hook up a TU56 with a better
interface than the TD8E, I'm interested in one, too (I already have a
TD8E/TU56... it's OK, but a bit slow).
-ethan
On Nov 22, 2006, at 11:34 AM, Al Kossow wrote:
A TC08 on
an omnibus card would be useful too.
*drooool* Oh yes. :-)
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