Paul Anderson <useddec(a)gmail.com> wrote:
> If you have an original 11/03, I have a dozen or so H780 power supplies,
> which are very hard to find. They are also used in the Vax 11/780 front
> end, the RKV11-D and possibly a few other items.
Wow, someone who actually knows about the RKV11-D!!! I've had DEC
people visit my place, see the RKV11-D, and proclaim that "DEC never
made that!". Since you know what it is, can you tell us anything about
how it came to be, and why it is so little-known?
I bought mine back in 1978 or so from Newman Computer Exchange for
my 11/03. I later added the missing wires (and chip) to enable 18-bit
addressing when I got an 11/73. I haven't used it since I moved to
Oregon six years ago, but it would take just a few hours to remove
the RK05 head locks and plug things in, assuming that all the
capacitors are still good.
It came in handy to prove to the RSX development group that RSX-11M
version 2.0 would run on an 11/73. :-)
Alan Frisbie
Now that I have my 18 bit retro computer working, I am thinking of
adding classic IO, like paper tape. Sadly I am a few decades too late.
Is there anything out there to replace a punch/reader used as 70's i/o?
Any good mag tape (cassete tape) replacements? I would love a tiny 9
track mag tape toy sized if they made one, like the wall hanging PDP8's.
On wish list, a flex writer or TTY video display replacement, ie
overstrike and underline in 2/3 size VT100 case.
Ben.
https://www.instructables.com/23-Scale-VT100-Terminal-Reproduction/
At 09:18 PM 3/11/2025, Jeffrey Brace via cctalk wrote:
>VCF West is back on August 1 & 2, 2025 at the Computer History Museum in
>Mountain View, California.
>
>We're partnering with the Sacramento Amiga Computer Club and AmiWest to
>celebrate the 40th anniversary of the Amiga and other special guests.
I'm considering attending this Amiga 40th anniversary celebration.
I was invited to speak on a panel on the topic of the experience of
early Amiga code development.
Who else might attend?
- John
I have a salvaged Epson 6110 tape punch on the bench, also it's interface card from a Data Dynamics Zip 30.
The 6110 is the shiny paper tape punch which was very common, at front left, on TTY etc in the 70's and into the 80's
I'm working on reverse engineering the Epson 6110's connector / interface, it's a "centronics" 24 pin.
Does anyone have or know of a spec for the Epson interface, or manuals for a system using it.
The basics are plain enough 24V power, ground connections, 8b+s, all low side drivers (54SN463's), one output (to a 7414) I presume Ready_n, and another two inputs I guess Enable_n and Advance_n (or maybe Reverse).
RevEng should get me there, documentation would ensure no possibility of magic smoke - excluding bad components.
Bring up plan is:
- apply 28 V and scope "connector"
- button up to suitable processor; ie interpose LoSide drivers between processor's LVTTL and the punch
VMTiA
Martin
Just a quick note/ update from my earlier post.
If you're looking for an option, please send me the board #.
Example:A DLV11 can be a M8017, M8027, M8028, or M8043 if my memory is
working tonight. My boards are basically in numeric order, and it takes
time to convert option # to part # and I don't want to ship anyone the
wrong part.
I have a few VT11's I will finally sell, along with a (believe it or not,
long story...)
VR17 which now has screen rot.
A few dozen BA350 and BA356 boxes and selection of power supplies and
drives.
50 or so "S" box handle boards including M3108, M3116, M3127 DESQA, M3134,
M5976 KZQSA, M7493, M7740 KLESI, M8086 LPV11, M8020 DPV11,
M7516 DELQA, M7504 DEQNA, M7504, M7554 CPU, Non DEC and more.
Also found a pile of DECMUXII , DECMUX300, decservers and that type of
stuff.
And something everyone needs, SC08s!!!
Please excuse any typos or messed up part #s.
Thanks, Paul
Per the link below, it mentions a reference manual to IBM's BASIC for the
System/3 as part number GC34-0001-1 but that no digital copies are known
to exist.
https://manx-docs.org/details.php/19,11119
I know at VCF East they've been trying to restore one of these. Not sure
if any functional system still exists (especially probably not the Model 6
with CRT and disk drive).
Anyway, if anyone happens to have the physical manual described above, I'm
just curious if in the first few pages was it publication date? (before or
after 1970?)
Also - since IBM went out of their way to re-use the BASIC from the
System/3, does that imply there was never a variation of BASIC written for
the IBM 360/370? (asking because from my understanding, the System/3 was
a lot more difficult to program and operate -- and yet someone wrote a
BASIC interpreter for it).
-Steve
