> From: Guy Sotomayor
> I'm using FRAM. They have unlimited write cycles
Although I hear the latest flash have very, very large numbers of write
cycles. But if you can get large enough FRAMs, yeah, they seem like a better
alternative.
> I didn't want to have any sort of removable media as that bring its own
> sets of challenges.
Oh well, back to loading all the bits in over a serial line (although I
suppose if one has some other removable media drive, e.g. a RX02, one could
get the bits in that way).
>> (Or perhaps even a front-end running on a PC which is connected to
>> the MEM11 over the serial line.)
> That was my original thought (command front end) but that would mean
> writing/supporting a bunch of different programs for different
> OS/platforms
Well, probably only at most two (Windoze and Linux), and maybe only one (since
there are Windows emulation packages for Linux). Although if one stuck to a
line-oriented interface, something like CygWin would allow one to have only
one version.
> and I want the MEM11 to pretty much stand on its own
Oh, I agree that that's a worthy goal - the front-end would only be to make it
'user-friendly', instead of cryptic and terse.
> the realistic limit will be on the Unibus interface ICs. I have (at
> last inventory) enough for ~25 boards. After that I'll have to see if I
> can either source additional parts or re-design that part of the board
> to use something else.
Yes, that _is_ a problem...
Noel
Here's something you do not see every day.
There are four people interested in bringing a variant of PDP-8 to VCF
East next spring (April 17-19).
On the PDP-8 front, so far only David Gesswein is registered; others
will be soon.
It would be very cool if there were LOTS of PDP-8 computers at the show,
in honor of the original Straight-8's 50th anniversary. (We invited
Gordon Bell, who said he's unable to attend that weekend. Darn.)
So: if you've got a PDP-8 of any flavor, and you've always dreamed of
showing it off and/or attending a VCF, now's your chance. Paging all the
California and Boston people!!!! :)
Overall exhibits so far are here:
http://www.vintage.org/2015/east/exhibit.php -- we're expecting 30 or so
by April.
There will also be a dozen or more technical classes on Friday, April
17. So far only one is posted, but we've got most of the others almost
determined, and those will be posted soon.
Keynoters for the weekend are Ted Nelson (Saturday) and Bob Frankston
(Sunday).
The terminal controller board on my VT101 is not working, if it displays
anything it is random characters. I have used my scope to check the 8085
CPU. It has power, it is outputting a valid clock, but there is no activity
on the RD,WR and ALE pins. I am guessing the 8085 is bad, but before I go
replacing it I wanted to check if anyone knew of anything else that might
cause the 8085 to misbehave (ie am I seeing symptoms or a cause?).
It looks to be easy to get 8085s, if I replace it I will socket it at the
same time, but would rather avoid having to desolder it if the problem is
elsewhere.
Any advice gratefully received.
Thanks
Rob
PS Just to check that the rest of the terminal works, I substituted the
terminal controller board with one from a VT102 and it worked perfectly. So
the problem is definitely on the terminal controller board.
For any of you who are on more than one of these lists, I apologize
in advance for your getting multiple copies of this.
Now that I'm moved into the new place and the man cave (my basement)
is converging on a usable state and in recognition of the upcoming 50th
anniversary of the introduction of the PDP-8, I'm about to embark on a
project to restore a PDP-8/M I got a while back. Unfortunately, this one
is somewhat incomplete.. So I'm looking to start collecting some of the
bits I'll need before it's all said and done. The items I need are in descending
order of priority:
KK8E M8320 Bus load module
KL8E M8650 Async module
H851 Inter-module jumper blocks for the CPU boards
Memory
Storage device and controller
Power switch key
One front panel switch paddle
If you have any of those that you're looking to unload (especially
the M8320 or the M8650), let me know.
Obviously, I can live without the switch paddle and I should be able to
get a new key cut, but if anyone has extras lying around, I promise to
give them a good home. The truth is I don't expect to come up with
memory or storage devices for what I can justify spending. However,
it turns out I do have an Omnibus prototype board. So I'm planning
to use that to build a device to emulate a set of RK05s using an SD
card for storage, and if need be, I can put memory on there too.
Thanks in advance,
BLS
At 08:56 AM 8/11/2014, Jason Scott wrote:
>I'll work on finding and getting them on archive.org!
>
>
>On Mon, Aug 11, 2014 at 4:59 AM, Jacob Dahl Pind <rachael at telefisk.org>
>wrote:
>
>>
>> Does anyone by change have either of the following walnut creek cdrom,
>>
>> AB20 Amiga CD-ROM
>> Aminet CD-ROM disc, 6/93 , ( note this is not part of the aminet cds from
>> Urban D. Mueller)
I bet I have them both; the trick would be finding them.
- John
They seem to have broken it sufficiently now that nothing is returned after the end of October.
Is there anyone indexing Usenet that has a clue? It seems like all that is left is for-pay
services for searching alt.binaries.
hello all,
I'm in the process of repairing our 101 but i hit a solid wall finding
out whats wrong with it. are there people with a working copy who could
do some measurements on their copy?
Unfortunately i have no schematic of the electronics, only the mechanics
and PSU.
I have made a crappy video of the scope trace of the delay line input
and i'm very interested in a video of a working machine's delay line. :-)
The video is here: http://youtu.be/llpwjGeldt0
and a partially repairlog is here:
https://hack42.nl/wiki/Repair_Olivetti_Programma_101
als scematics are welcome as well. :-)
--
Met vriendelijke Groet,
Simon Claessen
drukknop.nl
Happy New Year, all!
Has anyone here gone through the process of reparing leaky NiCd damage
to an A4000 motherboard? I _thought_ I had removed the battery some
time ago but puttering around today, I cracked open the case to find
the battery still there and some damage around U891 (a 74F245) and
U850 (Bank 3 DIMM socket). I have washed off the residue but I may
have to pull a DIMM socket to get access to the vias under it.
I know the general process, but I'm curious if anyone has done this
specifically to an A4000 board and has any tips. As I said, I'm
probably going to have to pull the DIMM socket to get to all the
damage.
Barring success from running a dozen or so repair wires, would anyone
happen to have a lead on an A4000 motherboard? Everything else in the
machine should be good, the Daughter Card, the CPU card, etc...
It's my only A4000, so I'd like to get it back up and running, or
replace it if necessary.
Thanks for any tips,
-ethan
I need to connect an external 8" floppy drive to the FDADAP card.
I've found two drives: NEC FD1165A and Shugart SA851. I have to buy ine
of them.
I'm about to choose the NEC one, since it doesn't need an AC power
source.
The Shugart SA851 is targeted 115 VAC, and I live in Europe.
Beside power supply questions, are there other reasons why I should
choose the Shugart? Hard sectored disk support? I only have to
read/write IBM S/36 and 5120 floppy disks...
Thanks!
--
Vincenzo (aka Supervinx)
--==ooOoo==--
My computer collection:
http://www.supervinx.com/Retrocomputer
--==ooOoo==--
You can reach me at:
www.supervinx.comwww.facebook.com/supervinxhttp://www.youtube.com/user/supervinxhttp://www.myspace.com/supervinx
Does anyone know if at any time in the past thirty years if the material
used to make capstans has changed? I.E. can one be more confident of tape
drives manufactured after some era to have non-goo capstan or is it that all
tape drives (including ones manufactured now are ticking time bombs?
Also how do you guys check capstans? Just stick long Q-tip in there? Thanks.
-Ali
