Re: [NTLK] NEEDED: cables

James Fraser wrote:
> Hello,
>
> --- On Thu, 2/5/09, Dennis B. Swaney <romad@aol.com> wrote:
>
>> Which is WHY I SAID the PC cable had a different pin-out
>> than the Mac cable.
>
> Yes, you did, in a previous message, not the one that I replied to. Unfortunately, I didn't see your previous message until just now.
>
>> Reilly said that he never saw a PC with a mini-DIN port/cable.
>
> What he said was "I've never seen a pc use use a mini din for /serial/."
>
>> The "PS/2" ports ARE miniDIN ports. And they use a SERIAL data signal.
>
> I agree, but nomenclaturally speaking, they are different from serial ports.
>
>> The PS/2 nomenclature is because they were first used on
>> the IBM Personal System 2 computer.
>
> Yes, and the reason why PS/2 ports were used is because, IIRC, at one point in time, mice were commonly plugged into serial ports. But since modems *also* used serial ports, configuration conflicts sometimes arose when each tried to share the same IRQ or memory address.
>
> PS/2 ports came about in an effort to solve that problem. PS/2 ports (and the mice designed to use those ports) worked independently of the serial ports and avoided such conflicts.
>
> So while I agree with you fully that a PS/2 port uses a miniDIN connector and uses a serial data signal, nomenclaturally speaking, a PS/2 port and a serial port are two different things, hence the two different names.
>
>> BTW, the Mac cable is a mini-DIN 8 and my Keyspan USA-28X
>> has 8 pins, not 9 (unless you are counting the metal shield as the 9th
>> pin?)
>
> Yes, I agree, and I sent a follow-up mail correcting that mistake.
>

Yep, it looks like our messages kept crossing in the ether.

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Received on Thu Feb 5 13:28:59 2009