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Author Topic: Unicomp Ultra Classic Key Rollover  (Read 8180 times)

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Offline Ethan87

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Unicomp Ultra Classic Key Rollover
« on: Wed, 12 October 2016, 10:25:07 »
Hi! I was recently planning on buying the Unicomp Ultra Classic keyboard. Now I don't really understand rollover, but it appears I cannot use Ctrl+Shift+Right click? This is a must for 3D suites, here is the response I got from Unicomp

Given the way we connect our switch matrix, our statement about phantom keys and rollover is, unfortunately, complicated. Our keyboards meet and exceed the Microsoft and IBM standards for multi-key combinations. Our keyboards will support any one to four modifier key combination (Shift, Control, Alt and/or GUI keys) plus a fifth key as long as:

1) No Left+Right modifier keys (Left+Right Shift, Left+Right Control, etc.) are involved in the combination, and

2) Neither the Up Arrow, Pause key, nor the Caps Lock key are the fifth key.

Our original intent was to support multi-key sequences required by any Microsoft OS or Application and to the best of my knowledge, that's still true. Of course our keyboards will support other key combinations larger than five key sequences without generating a phantom key situation and there are some 3 key sequences which will generate a phantom condition. Consequently, it's difficult to make a generic statement beyond the one above.

As for rollover, the USB HID and boot protocol standards limit our USB keyboards to six key rollover. The buffer sizes and key processing in our PS/2 controller limit those keyboards to 7 or 8 key rollover.

Regards,

Customer Support


So can someone enlighten me? I really want this keyboard
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Offline fohat.digs

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Re: Unicomp Ultra Classic Key Rollover
« Reply #1 on: Wed, 12 October 2016, 11:03:37 »
I am pretty sure that you will be OK.

No expert on rollover, and more knowledgeable people will elucidate my answers, but I think that they are saying that the problem is when you try to use both shifts or both controls as part of the combo.

Microsoft OS standards require combinations, people hear "2-key rollover" and think that means that Control-Alt-Delete won't work, but Control, Alt, and Shift usually don't "count" in the rollover addition.
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Offline 0100010

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Re: Unicomp Ultra Classic Key Rollover
« Reply #2 on: Thu, 13 October 2016, 20:16:41 »
Get it, will be fine.  I'd get the 103 key version if I was ordering.
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Offline 0100010

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Re: Unicomp Ultra Classic Key Rollover
« Reply #3 on: Thu, 13 October 2016, 20:18:34 »
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Offline chyros

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Re: Unicomp Ultra Classic Key Rollover
« Reply #4 on: Fri, 14 October 2016, 03:11:43 »
ALL Model Ms, including Unicomp's, have 2KRO. In order to see what that REALLY means, have a look at my video about it:

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Check my keyboard video reviews:

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