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Posted: 9/14/2014 2:48:52 PM EDT
[#1]
Same reason why a lot of them have 8 USB ports on the back, and headers for another 8 (or more) USB ports.
Because it's insanely cheap to add them, and somewhere out there, SOMEONE wants it. |
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Posted: 9/14/2014 3:28:29 PM EDT
[#2]
Some people prefer PS/2 ports for gaming. Supposed to be faster, though I'm guessing that's one of those mostly in the mind things.
Business PCs probably still have them just in case they need to pull an old peripheral out of storage for whatever reason. |
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Posted: 9/14/2014 8:01:12 PM EDT
[#3]
Don't most mechanical gaming keyboards use PS/2 for n key rollover?
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Posted: 9/14/2014 11:27:06 PM EDT
[#4]
Quote HistoryQuoted:
Don't most mechanical gaming keyboards use PS/2 for n key rollover? Most newer boards do some magical mumbo jumbo and can get n-key through USB. I've got a Ducky mechanical board that has NKRO through its USB port. |
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Posted: 9/15/2014 11:25:11 AM EDT
[#5]
I see this more on DIY motherboards than I do on big OEM desktops (Dell, HP, etc.)
My theory is demand for these legacy ports is coming from the industrial /manufacturing industry. Last project I worked on was at a printing company, and there were occasions I got asked to assist maintenance with a press or other device. Over time, the embedded controllers would fail, and were replaced or upgraded with a pc, or the pc's guts would be migrated into the old case. The ports would be in use by a barcode scanner or other custom legacy input device. |
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Posted: 9/15/2014 11:32:54 AM EDT
[#6]
PS2 is preferred for things like MAME interfaces because of the way USB handles multiple simultaneous button (key) presses and is buffered.
More options are always better. Unused ports are no big deal. Needing a certain port type and not having it is a bigger deal (RS-232 comes to mind). |
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Posted: 9/15/2014 12:53:55 PM EDT
[#7]
Quote HistoryQuoted: Don't most mechanical gaming keyboards use PS/2 for n key rollover? That was the main reason PS/2 hung on so long. Newer keyboards have a chip that emulates multiple keyboards to get around that. |
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Posted: 9/15/2014 1:06:03 PM EDT
[#8]
many gov/mil/civ disable USB ports and use PS/2 for KB and mouse only as a security measure.
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Posted: 9/15/2014 5:40:10 PM EDT
[#9]
It's so you can use a proper keyboard
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Posted: 9/15/2014 6:05:44 PM EDT
[#10]
Quote HistoryQuoted:
It's so you can use a proper keyboard http://atariage.com/forums/uploads/monthly_03_2014/post-9089-0-59805300-1394532572.jpg /thread |
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Posted: 9/15/2014 11:25:14 PM EDT
[#11]
Current wired (okay I know not many people have wired ones) Xbox controllers still have a PS2 to USB adapter in them. Not sure if it's a standardized PS/2 connector for a keyboard...too lazy to look.
I'm not missing RS-232 that much...I still have a port on a Pentium 3 machine. On everything else I just use a RS-232 adapter. |
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Posted: 9/17/2014 1:23:16 AM EDT
[#12]
I'm not missing RS-232 that much...I still have a port on a Pentium 3 machine. On everything else I just use a RS-232 adapter. I've been pretty lucky avoiding the need for serial to usb dongles. The last two times I needed a serial connection, I was able to go TTL to USB adapter, or serial to ethernet. |
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Posted: 9/17/2014 10:03:00 AM EDT
[#13]
Quote HistoryQuoted:
I've been pretty lucky avoiding the need for serial to usb dongles. The last two times I needed a serial connection, I was able to go TTL to USB adapter, or serial to ethernet. Quote HistoryQuoted:
I'm not missing RS-232 that much...I still have a port on a Pentium 3 machine. On everything else I just use a RS-232 adapter. I've been pretty lucky avoiding the need for serial to usb dongles. The last two times I needed a serial connection, I was able to go TTL to USB adapter, or serial to ethernet. Hell, I still use DOS on a regular basis. I've also found that buying some cables in serial forms is $10 cheaper a cable. When you have 15-20 different cable combos that you only use one at a time, a RS-232 adapter (and one for backup) seems really cheap. They only two things that I use TTL on is console for raspberry-pi, and Baofeng radios. |
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