RK11-C indicator panel inlays?

Henk Gooijen henk.gooijen at hotmail.com
Mon Dec 6 09:13:09 CST 2021

Van: David Bridgham via cctalk<mailto:cctalk at classiccmp.org>
Verzonden: maandag 6 december 2021 15:52
Aan: General Discussion: On-Topic and Off-Topic Posts<mailto:cctalk at classiccmp.org>
Onderwerp: Re: RK11-C indicator panel inlays?

On 12/5/21 4:43 PM, Henk Gooijen via cctalk wrote:

> I am definitely interested. Never saw the RK-11C (except once on eBay some 15 years ago)!
> However, I have *two* DX11 front panels with the 144 lamps & 4 ”paddle” connections boards.
> I developed a 100x160 mm (Euro-card size) PCB with a PIC18F252 and 10 MCP23S17 ICs.
> You serially send a command to the PIC and the PIC controls the MCP23S17 outputs.
> Per command you control 8 lamps. On the PCB is one difficult part: a 4 position one-slot block
> to put the 4 paddle boards in.

Fun.  That's a way to get some more lights into your life.  I like it.

> Given you have 144 lamps panel with the RK11-C front, what would you do to light up the lamps?

I think the only reason to have an RK11-C inlay is if you have an
RK11-C.  Otherwise I can't see that it makes much sense.

The one other place I might, maybe, possibly see one being used is along
with one of our QSICs or USICs.  I could add an option to drive an
RK11-C inlay if someone really thought that was what they wanted but the
RK11-F inlay that we came up with really is a better match and more
functional (which is why we came up with it) as well as supporting the
RP11 implementation that I'm sure I'll get working any day now (snort).


If this RK11-C “blinkenlight” panel would also become available in a 60% scaled format,
I would buy it immediately. It would be an “übercool” addition to the PiDP-11/70 and
my 60% scaled (“working”) RK05 drive. I only modified the files pdp11_cpu and pdp11_rk05,
and added my own code to handle the 2 switches, 8 indicators and the door / disk loading.
see https://www.pdp-11.nl/pidp1170/rk05/rk05startpage.html (at the bottom of the page).
I will check whether it could be scaled to 60% using standard 3 mm (warm-white) LEDs
(if those exist, else I would probably use yellow-ish).

Henk, PA8PDP

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