Well . . . it seems to work, now that I've fiddled with the broken jumper
wire. The wire was broken but the insulation wasn't, and it was done so
neatly, I couldn't initially believe it was a user-installed jumper wire.
Now that that's done, I can put it in the "works" box . . .
Thanks for the help.
Dick
-----Original Message-----
From: Marvin <marvin(a)rain.org>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Thursday, June 03, 1999 7:04 PM
Subject: Re: VECTOR GRAPHICS 64K DRAM Card - switch settings?
> Richard Erlacher wrote:
>
> Would anyone be able to help me with this VECTOR GRAPHICS 64K DRAM BOARD's
> switch settings? The signals seem to be OK, but no data propagates from
> the thing. I'm not anxious to count through the combinations of
> settings.
According to the schematics for the Rev-3 board, S1 is the Bank Select with
positions 0 - 7 (or probably labeled 1 - 8) corresponding to D0 - D7. D0 -
D7 go through 74175 Quad D latches and come out on the Not Q outputs. These
are then all anded together (U41 - 74ls30) to output the Bank Select signal.
Hmmm, interesting, it looks like the inputs are left floating when the
switch is open, and I have a hard time believing that with LS type
circuitry.
There is a note indicating:
Jumper Memory Enabled
1 to 3 0000h - FFFFh
5 to 3 0000h - DFFFh
4 to 3 0000h - BFFFh, E000h - FFFFh
2 to 3 0000h - BFFFh
Would anyone be able to help me with this VECTOR GRAPHICS 64K DRAM BOARD's switch settings? The signals seem to be OK, but no data propagates from the thing. I'm not anxious to count through the combinations of settings.
thanx
Dick
Well . . . I'm going through all these piles of S-100 boards, see, and I put
the working ones in that box over there, see, and then I put the ones that
don't over in this box.
I've got this Jade Memory Bank and don't seem to have the doc's for it any
more either. . . and it has THREE switch blocks along with over a dozen
jumpers . . . it even seems to have an IC missing. . . .
Does anyone of you guys have any detailed doc's on this one?
Dick
-----Original Message-----
From: Erik Brens <ebrens(a)dds.nl>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Thursday, June 03, 1999 6:26 PM
Subject: Re: DEC pdp11/70 console docs
>
>> documentation for the console board was not included :/
>
> ^^
>Hello again,
>
>by "console board", I actually meant the front console panel (the thing
>with the switches on it).
>
>> Thanks in advance,
>> Erikb.
>>
>
I have a friend (Yes, Virginia, I have two friends) who's been a DEC
repairman for many years. He now wants to get rid of the accumulated a lot
of stuff in his barn, and has asked me to help get rid of it.
I'm not sure I have the time to make a complete catalogue of all his stuff.
Anyway, I know squat about big iron, and therefore don't know what's
valuable to people.
Please, therefore, email me with your wants -- anything from, "I'll take
anything" to "keep an eye out for this widget". I have no idea what he wants
for all of this, bit I doubt he's out to gouge.
manney(a)hmcltd.net
pgphoto(a)ragemail.com
P Manney
"Y1K caused the Dark Ages."
Thousands of discounted photo items at http://www.hmcltd.net/pgphoto
-----Original Message-----
From: Colan Mitchell <cdrmool(a)interlog.com>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Wednesday, May 26, 1999 4:37 PM
Subject: confidential info on old harddrives.
>
>If this is a ? thats been dealt with before I joined the list my
>apologies.
> I repeatedly come across personal and confidential information on
>discarded computers. I sit and shake my head in shock. Lawyers seem to
>be the worst. I have considered contacting the original owners and
>educating them about practicing safe hex but, especially in the case of
>lawyers and women, don't want to have them freak out and think I'm being
>weird and calling the police. On the other hand I feel that I should do
>something. In the end I just format the drives and forget about it.
> Has anyone experienced contacting an original owner? What was the
>response. This is something that I've not read about in the media as Y2K
>and Hackers get all the press but I suspect this is a bigger potential
>problem.
>
>
>Colan
>
>
>
>
>
> > Hi
> > Let me see, that is 384 machine pin sockets in 2102's alone.
> > Do you have a special discount that you might share?
>
Sorry to butt in, but I have a suggestion.
I use collet pin carries, these are metal carriers with machined
pins attached to them. You solder them on the board, remove the carrier,
then you have 16 nicely placed machined pins free standing. This allows much
easier inspection of the final solder joint since you don't have a plastic
dip case in the way, I buy them by the 1000 at about 5 cents each (14 pin
carriers, but you can get them any size) and that satifies all my socket
needs. If I need 16 pin,20 pin or 40 pin (rare) sockets I simply remove the
pins from a couple carriers and manually solder them. Also works well for
transistors, caps, resistors or what have you.
steve
>
> What percentage of your space is taken up by the hardware and how much
> by everything else? What is the ratio of actual computers to all the
other
> stuff that goes along with them? Please tell me the catagory(s) of
computer(s)
> you collect (mainframe, etc.), and what your percentages are.
>
> Thank you very much.
>
------------------------------------------------------------------------
----
.
Kevin,
I collect both micros and minis.
I'd estimate that a microcomputer constitutes about 40% of the bulk. The
documentation, software, and other pieces would account for the remaining
60%.
For a mini, the computer with necessary peripherals (drives, etc...)
probably account for about 80% of the bulk. Documentation, backup media,
and other stuff taking the remaining 20%. Often times, the "other stuff"
can be kept on top of the mini without impairing it's function. That
generally doesn't work with a micro.
Of course, I don't have the original shipping containers, pallets or
packing material for a mini. That would skew the numbers a LOT! :-)
Steve Robertson - <steverob(a)hotoffice.com>
If this is a ? thats been dealt with before I joined the list my
apologies.
I repeatedly come across personal and confidential information on
discarded computers. I sit and shake my head in shock. Lawyers seem to
be the worst. I have considered contacting the original owners and
educating them about practicing safe hex but, especially in the case of
lawyers and women, don't want to have them freak out and think I'm being
weird and calling the police. On the other hand I feel that I should do
something. In the end I just format the drives and forget about it.
Has anyone experienced contacting an original owner? What was the
response. This is something that I've not read about in the media as Y2K
and Hackers get all the press but I suspect this is a bigger potential
problem.
Colan
Has anyone ever tried ProComm?
It's a DOS terminal emulator that I use on an old Zenith SupersPORT 8088.
Here's the different terminal that it can emulate:
VT-100
TVI 920
TVI 950
VT-52
LS ADM5
HEATH 19
ANSI-BBS
ADDS VP
WYSE 100
IBM 3101
It's a pretty useful program, and doesn't take up too much space. I have it
on all of my old laptops.
///--->>>
-Jason Willgruber
(roblwill(a)usaor.net)
ICQ#: 1730318
<http://members.tripod.com/general_1>
I find myself without the necessary doc's to rewrite the BIOS for a system
using a small in capacity but 8" in size HDD. Would any of you kind and
resourceful souls have the necessary data on hand to help me out with this
task?
Thanx
Dick
