3 Feb
1998
3 Feb
'98
2:33 p.m.
<example, certainly is. I'm not saying we don't need 15 pins; I say we ne
<15 THICKER pins, and since this connector is typically the only connecto
<on the back of a VGA adapter, there's plenty of room.
Par of the resoning was that it should have a connector that is not like
any other. if it were a standard db9 or db15 you'd have people plugging
into the serial port screaming it don't work. It's bad enough that you
have people that will force things no matter what.
Allison
3 Feb
3 Feb
3:10 p.m.
Allison J Parent wrote:
<example, certainly is. I'm not saying we don't need 15 pins; I say we ne
<15 THICKER pins, and since this connector is typically the only connecto
<on the back of a VGA adapter, there's plenty of room.
Par of the resoning was that it should have a connector that is not like
any other. if it were a standard db9 or db15 you'd have people plugging
into the serial port screaming it don't work. It's bad enough that you
have people that will force things no matter what.
Allison
Especially from the experience of the AT&T (Olivetti) 6300 video
interface using what looked liked a standard DB-25, but with one
line carrying 70vdc to power the monitor. A guy with a standard
PC printer cable discovered the only way I ever heard of to kill
a Radio Shack Daisy Wheel Printer II (a tire iron wouldn't!). It
also killed the 6300, but at the time they were easier to find.
--
Ward Griffiths
Dylan: How many years must some people exist,
before they're allowed to be free?
WDG3rd: If they "must" exist until they're "allowed",
they'll never be free.
7:11 p.m.
Allison J Parent wrote:
Big snip!
Allison
Especially from the experience of the AT&T (Olivetti) 6300 video
interface using what looked liked a standard DB-25, but with one
line carrying 70vdc to power the monitor. A guy with a standard
PC printer cable discovered the only way I ever heard of to kill
a Radio Shack Daisy Wheel Printer II (a tire iron wouldn't!). It
also killed the 6300, but at the time they were easier to find.
--
Ward Griffiths
Dylan: How many years must some people exist,
before they're allowed to be free?
WDG3rd: If they "must" exist until they're "allowed",
they'll never be free.
4 Feb
4 Feb
5:31 a.m.
jpero(a)cgo.wave.ca wrote:
70vdc in that thing!? Hee hee hee...I'm sure it burnt out one or 2
buffer chip if the printer is decent enough but I'm assured that
printer is hosed if it's recent made.
I have no idea why some guys would need 70vdc for unless it is for
color but that current draw is too much via 1pin?
That was the sole power to the monitor, there was no external power
cord for it.
--
Ward Griffiths
Dylan: How many years must some people exist,
before they're allowed to be free?
WDG3rd: If they "must" exist until they're "allowed",
they'll never be free.
Allison J Parent wrote:
Big snip!
Allison
Especially from the experience of the AT&T (Olivetti) 6300 video
interface using what looked liked a standard DB-25, but with one
line carrying 70vdc to power the monitor. A guy with a standard
PC printer cable discovered the only way I ever heard of to kill
a Radio Shack Daisy Wheel Printer II (a tire iron wouldn't!). It
also killed the 6300, but at the time they were easier to find.
--
Ward Griffiths
Dylan: How many years must some people exist,
before they're allowed to be free?
WDG3rd: If they "must" exist until they're "allowed",
they'll never be free.
4:32 a.m.
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10:43 a.m.
Tony Duell wrote:
Well, that's what my hardware guy at the store said back when we got
the news, back when I was still doing retail software support. I'll
admit that I've never measured it myself nor owned one -- my AT&Ts
are all 7300/3B1 series. If he told me wrong or made a mistake, it
wouldn't be unique in my experience. I did see the CPU and printer
in the store -- it looked like all of the magic smoke had escaped
Especially from the experience of the AT&T
(Olivetti) 6300 video
interface using what looked liked a standard DB-25, but with one
line carrying 70vdc to power the monitor. A guy with a standard
Are you sure about that 70V? I've repaired Olivetti M24 PSUs (what we
call the AT&T6300), and there's only the +5V and +/-12V outputs. Now, 12V
is present on the monitor connector, and it would certainly kill a
Centronics interface, but I doubt very much if there's anything higher there. from both units.
--
Ward Griffiths
Dylan: How many years must some people exist,
before they're allowed to be free?
WDG3rd: If they "must" exist until they're "allowed",
they'll never be free.
3 Feb
3 Feb
4:05 p.m.
At 23:33 2/3/98 -0500, Allison wrote:
<....I say we need
<15 THICKER pins, and since this....is typically the only connector
<on the back of a VGA adapter, there's plenty of room.
Part of the reasoning was that it should have a
connector that is not like
any other. if it were a standard db9 or db15 you'd have people plugging
into the serial port....
Okay, then; make it DB15 male on the card bracket and female on the
monitor. That way it's backwards to the joystick port, and people don't
mix it up, any more than they mix up "DB25" male serial and female parallel.
__________________________________________
Kip Crosby engine(a)chac.org
http://www.chac.org/index.html
Computer History Association of California
4 Feb
4 Feb
12:49 a.m.
At 11:33 pm 2/3/98 -0500, you wrote:
<example, certainly is. I'm not saying we don't need 15 pins; I say we ne
<15 THICKER pins, and since this connector is typically the only connecto
<on the back of a VGA adapter, there's plenty of room.
Par of the resoning was that it should have a connector that is not like
any other. if it were a standard db9 or db15 you'd have people plugging
into the serial port screaming it don't work. It's bad enough that you
have people that will force things no matter what.
I truly believe that this is the reason, but can't help but be slightly
amazed that, of all companies, IBM would be concerned with idiot-proofing a
box. After all, weren't most of their boxes intended to go into shops where
an "adequate" support mechanism would exist to set them up?
The extreme of this is companies like Packard Bell who color code all the
connectors.
At the other end of the spectrum, you have Apple who uses the same DB-15 on
all monitors and DB-19 on all floppy drives. The result is the
all-too-frequent FAQs:
- Can I use an Apple //gs monitor on a Mac?
- Can I use my Mac (or //gs) monitor on my //c?
- Can I use my 5.25" Unidisk on a Mac?
- etc.
Heck, I'm amazed Tandy got along as long as they did putting every thing on
34-pin edge connectors and DIN plugs.
<<<John>>>
9824
days inactive
9825
days old
7 comments
6 participants
participants (6)
-
allisonp＠world.std.com -
ard＠p850ug1.demon.co.uk -
engine＠chac.org -
gram＠cnct.com -
jpero＠cgo.wave.ca -
jruschme＠exit109.com