GPIB: 24-pin Centronix connectors?

[Archimedes' Lever]

incorrect,

WRONG, FUCKTARD! UDMA REQUIRES the master be placed at the END of the
cable. IF you had READ the WIKI cite, you would already have enough of a
clue to know this, but since you obviously didn't read it, much less have
ANY grasp of it, you are clueless.

1 either drive can be put on the end of the cable.
WRONG.

2 drives are drive-0 or drive-1 not master ans slave.

WRONG. The IDE interface utilizes two drives per chain, and they are
utilized with one as master and the other as slave. THAT IS THE WAY IDE
WORKS, idiot!

'drive 0' and 'drive 1' are how the drives are called out in partition
tables and volume listings in operating systems. At the hardware level,
it is master and slave since the drive controller is on the drive, there
has to be one active, and one that is SLAVED to the other.

You are about as clueless as it gets, Betts.

(and a single drive can be either and still function)

WRONG. A stand alone drive must be set as master.

if you had actually read the wiki you would have learned that it is a
cable-select cable.

No, it is not, dipshit.

that is false, cable select is optional with cable select cables.

You're an idiot. Come back when your clue level is higher than that of
Starbuck Flying.

 

[Archimedes' Lever]

On Fri, 26 Dec 2008 18:35:00 -0600,

If the volumes are high enough, the extra cost won't be much.

There is NO difference. 1M of any of the 3 connectors is the SAME
PRIVE. Placing them into three different bins in your warehouse is the
SAME PRICE. Using them during an assembly process is the SAME PRICE.

The idiot that thinks making the cable would cost more has no clue how
manufacturing works, large or small volume.

It probably pays for itself by allowing easy visual inspection
and/or simplifying the text in the installation description.

It is a visual aid, and there have been others over time.

 

[Joerg]

JW wrote:

[...]

That would make it even worse, by about 1" in extra length. I just want
to solder cable onto a solder-cupped 24-pin Centronix and come out
sideways, then 3-4ft to some location where the Prologix can comfortably
reside.

I wonder if the twists in CAT5 would mess up the signals when using each
pair for two data lines. We'll see. After all, GPIB is really slow.

Sorry... Had a "duh" moment. The problem I was speaking of is that the
shell of the prologix device often interferes with the case of the
instrument. I had thought that that was what you were having trouble with.

We all have our "duh" moments. I had mine yesterday at church. A friend
and I mounted the motly collection of loose gear and cables into a nice
rack, laid everything in cables channels, looks really professional.
Turned it on for a test of all the sound channels. Big hum on all the
Sennheiser wireless channels. Bit my tongue, after all you don't want an
"unsuitable exclamation" slip out in a sanctuary. Turns out that all the
cables from there to the mixer were non-diff. Great, just great ...

 

[Jasen Betts]

Look, fucktard... You STILL select 'master' or 'slave' when you install
a drive in a UDMA interface.

Hey Shit for brains, I never said any different.

That means that it is NOT 'cable select'.

this is where you are WRONG WRONG WRONG WRONG.

Using a 'cable select' cable would REQUIRE that the drive be set to
'cable select' as well,

NO, never has, never will.

the drive has to be set in a compatible mode with any other drives on
the cable, that is all.

 

[Jasen Betts]

WRONG, FUCKTARD! UDMA REQUIRES the master be placed at the END of the
cable. IF you had READ the WIKI cite, you would already have enough of a
clue to know this, but since you obviously didn't read it, much less have
ANY grasp of it, you are clueless.

http://www.t13.org/Documents/UploadedDocuments/Project/d1153r18-ATA-ATAPI-4.pdf

page 9, if a single device is connected it should be connected to the
end of the cable reguardless of wether it is configuered as master or
slave,

WRONG.

1: show me where it says otherwise
2: what bad thing will happen.

WRONG. The IDE interface utilizes two drives per chain, and they are
utilized with one as master and the other as slave. THAT IS THE WAY IDE
WORKS, idiot!

'drive 0' and 'drive 1' are how the drives are called out in partition
tables and volume listings in operating systems. At the hardware level,
it is master and slave since the drive controller is on the drive, there
has to be one active, and one that is SLAVED to the other.

BULLSHIT. both drives are independant they just share most of the
conductors in the cable.

WRONG. A stand alone drive must be set as master.

BULLSHIT.

you may have a bios that will only boot the master. but I've connected
drives as slave on the end of a 80-conductor cable on the secondary
IDE port and they work just fine.

No, it is not, dipshit.
BULLSHIT


You're an idiot.

you speak for yourself.

 

[whit3rd]

... I've connected
drives as slave on the end of a 80-conductor cable on the secondary
IDE port and they work just fine.

Maybe they DO work, but PROPER TERMINATION requires
the end device be a 'master', and the UDMA documents
DO specify this. Noise margin is important, and "they work"
is a very weak statement.

The cables support cable select function (or they aren't UDMA
compliant); the choice of how to jumper the drive is not
forced by this circumstance.

 

[Jasen Betts]

Maybe they DO work, but PROPER TERMINATION requires
the end device be a 'master', and the UDMA documents
DO specify this. Noise margin is important, and "they work"
is a very weak statement.

have you got a link for that?
As far as I can determine AC termination is used at both drives

 

[Greegor]

I've seen a few computer systems that actually reported
that you had not used an 80 pin IDE/UDMA/ATAPI cable.

How does the mainboard tell 40 pin from 80 pin?
Does it detect reflective noise or what?

On the other hand, I thought this was a thread about
IEEE488/GPIB/HPIB and I didn't catch how it
devolved into IDE/UDMA/ATAPI from there.

I vaguely recall that once there were minor but
not to be ignored differences between those
almost identical ""standards"".

Apparently lab instruments is the last niche for '488?

I was scratching my head about the "garden hoses"
comment but it congealed when some comments
came up about multiple piggy backs and I recalled
how ugly four or five '488's piggybacked really were!

In modern medlab or electronics labs, have
USB 2.0 or Firewire become the new standard?

 

[Archimedes' Lever]

Hey Shit for brains, I never said any different.


this is where you are WRONG WRONG WRONG WRONG.

You are full of shit.

NO, never has, never will.

You are a goddamned retard. Always has... always will.

the drive has to be set in a compatible mode with any other drives on
the cable, that is all.

Wrong. When using 'cable select' feature, BOTH drives get set to cable
select, AND a MODIFIED 'cable select' cable MUST ALSO be used. In such
cables, the RIBBON gets holes punched in it and THAT is what detaches
certain pins on the assembly where the SAME CONNECTORS are used
throughout the ENTIRE INDUSTRY.

If you were any more clueless, you'd be named Roy!

 

[Archimedes' Lever]

page 9, if a single device is connected it should be connected to the
end of the cable reguardless of wether it is configuered as master or
slave,

Dumbfuck! In an IDE channel there is ALWAYS a master, you stupid ****.
The drive is where the controller is!

 

[Archimedes' Lever]

BULLSHIT. both drives are independant they just share most of the
conductors in the cable.

You're a goddamned idiot. In ALL IDE channels, one drive is the
channel's master, and the other drive, if and when present, is SLAVEd to
the first drive.

You're a goddamned clueless ****, and you are not even qualified to be
having this debate, punk.

 

[Archimedes' Lever]

BULLSHIT.

you may have a bios that will only boot the master. but I've connected
drives as slave on the end of a 80-conductor cable on the secondary
IDE port and they work just fine.

You're an idiot, and you're stupid as well, so you likely bought some
lame brand of drive that is a master, regardless of what the stupid
consumer brained installer (you) sets it to.

 

[Archimedes' Lever]

have you got a link for that?
As far as I can determine AC termination is used at both drives

Standard IDE did not matter. UDMA is twice the data rate, and it DOES
MATTER, and the reason is because of reflections.

 

[whit3rd]

have you got a link for that?

Oops; I overstated. The end device should be PRESENT if
the termination is to be correct, but the UDMA document
I was thinking of (ATA-ATAPI 5 rev. 3) only requires the master
at the end in section 5.2.13.2 saying "For ... all 80-conductor cable
assemblies... device 0 shall be at the opposite end of
the cable from the host" and this relates not to the
termination condition but to the cable-select feature.

The termination of master and slave (device 0 and device 1) is
not different in the electrical sense.

 

[Jasen Betts]

I've seen a few computer systems that actually reported
that you had not used an 80 pin IDE/UDMA/ATAPI cable.

How does the mainboard tell 40 pin from 80 pin?
Does it detect reflective noise or what?

the plugs are not straight-through plugs. most of the pins
are but each colour of plug has a few of the pins tricked
(egpen or gounded) in a different way.

On the other hand, I thought this was a thread about
IEEE488/GPIB/HPIB and I didn't catch how it
devolved into IDE/UDMA/ATAPI from there.

discussion of reducing noise by wiring ribbon cable
signal,ground,signal,ground,signal,ground

 

[Jasen Betts]

Standard IDE did not matter. UDMA is twice the data rate, and it DOES
MATTER, and the reason is because of reflections.

more made uo shit!
go away.

 

[Jasen Betts]

Oops; I overstated. The end device should be PRESENT if
the termination is to be correct, but the UDMA document
I was thinking of (ATA-ATAPI 5 rev. 3) only requires the master
at the end in section 5.2.13.2 saying "For ... all 80-conductor cable
assemblies... device 0 shall be at the opposite end of
the cable from the host" and this relates not to the
termination condition but to the cable-select feature.

The termination of master and slave (device 0 and device 1) is
not different in the electrical sense.

Thanks!

my appologies to all for attempting intelligent discussion with
Archimede's Lever who (like his hypothetical namesake) is apparently
thicker than two short planks.

http://www.math.nyu.edu/~crorres/Archimedes/Lever/LeverIntro.html

 

[Archimedes' Lever]

the plugs are not straight-through plugs. most of the pins
are but each colour of plug has a few of the pins tricked
(egpen or gounded) in a different way.

You're a goddamned LIAR!

discussion of reducing noise by wiring ribbon cable
signal,ground,signal,ground,signal,ground

A discussion about your lack of knowledge thereof.

 

[Archimedes' Lever]

my appologies to all for attempting intelligent discussion with
Archimede's Lever who (like his hypothetical namesake) is apparently
thicker than two short planks.

You're a fucking idiot, Betts.