18 Sep
2000
18 Sep
'00
10:04 a.m.
Anyone know of a source of RS-422 (Mac mini-DIN serial) female-female
gender benders? I'm toying with teaching the C128 to speak LocalTalk
through its ACIA cartridge but I can't seem to find a female RS-422 to
DB9 or DB25 connector, so I need some sort of gender bender to hook
the LocalTalk box up with. Does anyone sell these? I can find male-male
but this isn't too helpful :-)
By the way, Fry's sells Mac Crackers. Like so many other things at Fry's,
of course, no one there knows they do, but in the Tools section under
Torx T15 drivers is an honest-to-goodness 11" T15 MacCracker with magnetic
tip. Worked like a charm on the SE/30, and now it has a 1GB hard drive.
--
----------------------------- personal page: http://www.armory.com/~spectre/ --
Cameron Kaiser, Point Loma Nazarene University * ckaiser(a)stockholm.ptloma.edu
-- One learns to itch where one can scratch. -- Ernest Bramah -----------------
2:08 p.m.
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5:48 p.m.
On this list it seems to be the extra-long TX15 Torx
driver that you need
to undo the top 2 screws (the ones inside the handle) of a classic-Mac.
*And* there's some Torx screws on the inside, at least in this SE/30, that
also need the extra-long shaft.
I've seen another tool called a Mac Cracker (or a
Mac Case Cracker). This
was a special pair of pliers with wide (about 4" wide) thin, flat blades
in place of the jaws. You took out all the screws and put this tool in
the crack between the front case and the back shell. Squeezing the
handles caused the blades to force the case apart.
I've never bothered with one. In my experience, after removing all the
screws (not forgetting the one under the battery cover), put the machine
face down and press on the battery and on the connectors. Once the case
starts to move it'll come off easily.
Yeah, this I've seen also. It was totally unnecessary. Any reasonable amount
of care and the case will slide right off with a minimum of effort.
--
----------------------------- personal page: http://www.armory.com/~spectre/ --
Cameron Kaiser, Point Loma Nazarene University * ckaiser(a)stockholm.ptloma.edu
-- A dean is to faculty as a hydrant is to a dog. -- Alfred Kahn --------------
6:26 p.m.
It's been at least 10 years since my last look at RS422, bit IIRC, there
were two connectors involved in that spec. There was a DC37 of one geneder
or another, and there was, I believe, a DA15 as well, which was the one with
the differential high-rate signals on it. Does that sound reasonable to
anyone. I know most applications use(d) a subset of this standard but
referred to it as RS-422 only because they used the 5volt differential
signalling-copmpatible drivers, e.g. 26LS32/33, MC3486/87, etc.
Does this ring a bell with anybody?
Dick
----- Original Message -----
From: Cameron Kaiser <spectre(a)stockholm.ptloma.edu>
To: <classiccmp(a)classiccmp.org>
Sent: Monday, September 18, 2000 3:48 PM
Subject: Re: RS-422 gender benders
This
amount
> On this list it seems to be the extra-long TX15
Torx driver that you
need
to undo the
top 2 screws (the ones inside the handle) of a classic-Mac.
*And* there's some Torx screws on the inside, at least in this SE/30, that
also need the extra-long shaft.
> I've seen another tool called a Mac Cracker (or a Mac Case Cracker). was a special
pair of pliers with wide (about 4" wide) thin, flat blades
in place of the jaws. You took out all the screws and put this tool in
the crack between the front case and the back shell. Squeezing the
handles caused the blades to force the case apart.
I've never bothered with one. In my experience, after removing all the
screws (not forgetting the one under the battery cover), put the machine
face down and press on the battery and on the connectors. Once the case
starts to move it'll come off easily.
Yeah, this I've seen also. It was totally unnecessary. Any reasonable of care and the case will slide right off with a
minimum of effort.
--
----------------------------- personal page:
http://www.armory.com/~spectre/ --
Cameron Kaiser, Point Loma Nazarene University *
ckaiser(a)stockholm.ptloma.edu
-- A dean is to faculty as a hydrant is to a dog. --
Alfred
Kahn --------------
6:55 p.m.
"Richard Erlacher" <richard(a)idcomm.com> wrote:
It's been at least 10 years since my last look at
RS422, bit IIRC, there
were two connectors involved in that spec. There was a DC37 of one geneder
or another, and there was, I believe, a DA15 as well, which was the one with
the differential high-rate signals on it. Does that sound reasonable to
anyone. I know most applications use(d) a subset of this standard but
referred to it as RS-422 only because they used the 5volt differential
signalling-copmpatible drivers, e.g. 26LS32/33, MC3486/87, etc.
I think you might be talking about RS-449. AFAIK, RS-422 is ONLY an
electrical specification, and does not recommend a connector. IIRC,
RS-449 specifies a connector and the use of RS-422 electrical interfaces.
And then there's RS-485, which is multi-drop (party line) RS-422. No
connector spec for this one either.
8:42 p.m.
"Richard Erlacher"
<richard(a)idcomm.com> wrote:
AAAAAAA! Okay, okay, okay, Mac mini-DIN female-female! (lest I precipitate
a standards discussion ... :-)
--
----------------------------- personal page: http://www.armory.com/~spectre/ --
Cameron Kaiser, Point Loma Nazarene University * ckaiser(a)stockholm.ptloma.edu
-- The steady state of disks is full. -- Ken Thompson -------------------------
It's been at least 10 years since my last
look at RS422, bit IIRC, there
were two connectors involved in that spec. There was a DC37 of one geneder
or another, and there was, I believe, a DA15 as well, which was the one with
the differential high-rate signals on it. Does that sound reasonable to
anyone. I know most applications use(d) a subset of this standard but
referred to it as RS-422 only because they used the 5volt differential
signalling-copmpatible drivers, e.g. 26LS32/33, MC3486/87, etc.
I think you might be talking about RS-449. AFAIK, RS-422 is ONLY an
electrical specification, and does not recommend a connector. IIRC,
RS-449 specifies a connector and the use of RS-422 electrical interfaces.
And then there's RS-485, which is multi-drop (party line) RS-422. No
connector spec for this one either.
9:39 p.m.
Nope! No need for a lengthy standards tirade. Eric's right . . . I was
actually thinking of the RS449 rather than 422.
Dick
----- Original Message -----
From: Cameron Kaiser <spectre(a)stockholm.ptloma.edu>
To: <classiccmp(a)classiccmp.org>
Sent: Monday, September 18, 2000 6:42 PM
Subject: Re: RS-422 gender benders
http://www.armory.com/~spectre/ --
> "Richard Erlacher"
<richard(a)idcomm.com> wrote:
> > It's been at least 10 years since my last look at RS422, bit IIRC,
there
> > were two connectors involved in that spec.
There was a DC37 of one
geneder
> > or another, and there was, I believe, a DA15
as well, which was the
one with
> > the differential high-rate signals on it.
Does that sound reasonable
to
> > anyone. I know most applications use(d) a
subset of this standard but
> > referred to it as RS-422 only because they used the 5volt differential
> > signalling-copmpatible drivers, e.g. 26LS32/33, MC3486/87, etc.
>
> I think you might be talking about RS-449. AFAIK, RS-422 is ONLY an
> electrical specification, and does not recommend a connector. IIRC,
> RS-449 specifies a connector and the use of RS-422 electrical
interfaces.
And then there's RS-485, which is multi-drop (party line) RS-422. No
connector spec for this one either.
AAAAAAA! Okay, okay, okay, Mac mini-DIN female-female! (lest I precipitate
a standards discussion ... :-)
--
----------------------------- personal page: Cameron Kaiser, Point Loma Nazarene University *
ckaiser(a)stockholm.ptloma.edu
-- The steady state of disks is full. -- Ken
Thompson -------------------------
6:29 p.m.
The old IBM 8512 and 8513 VGA monitors needed that extra-long extra-skinny
T-15 for their upper two screws as well. This was something the mfgs did
just to make those of us who wanted to fix'em rather than toss-em suffer a
bit.
Dick
----- Original Message -----
From: Cameron Kaiser <spectre(a)stockholm.ptloma.edu>
To: <classiccmp(a)classiccmp.org>
Sent: Monday, September 18, 2000 3:48 PM
Subject: Re: RS-422 gender benders
This
amount
> On this list it seems to be the extra-long TX15
Torx driver that you
need
to undo the
top 2 screws (the ones inside the handle) of a classic-Mac.
*And* there's some Torx screws on the inside, at least in this SE/30, that
also need the extra-long shaft.
> I've seen another tool called a Mac Cracker (or a Mac Case Cracker). was a special
pair of pliers with wide (about 4" wide) thin, flat blades
in place of the jaws. You took out all the screws and put this tool in
the crack between the front case and the back shell. Squeezing the
handles caused the blades to force the case apart.
I've never bothered with one. In my experience, after removing all the
screws (not forgetting the one under the battery cover), put the machine
face down and press on the battery and on the connectors. Once the case
starts to move it'll come off easily.
Yeah, this I've seen also. It was totally unnecessary. Any reasonable of care and the case will slide right off with a
minimum of effort.
--
----------------------------- personal page:
http://www.armory.com/~spectre/ --
Cameron Kaiser, Point Loma Nazarene University *
ckaiser(a)stockholm.ptloma.edu
-- A dean is to faculty as a hydrant is to a dog. --
Alfred
Kahn --------------
8886
days inactive
8886
days old
8 comments
5 participants
participants (5)
-
ard＠p850ug1.demon.co.uk -
eric＠brouhaha.com -
richard＠idcomm.com -
rigdonj＠intellistar.net -
spectre＠stockholm.ptloma.edu