Editing NCR 4950

{{infobox dkeyboard
| name         = NCR 4950
| image name   = Ncr_4950_top.jpg
| model        = 4950 2920-9002-9000
| pn           = 
| fcc          = 
| branding     = [[NCR]]
| family       =
| manufacturer = [[Hi-Tek Corporation]]
| switch       = [[Alps SKCL Green]]<br>[[Hi-Tek Series 725]]<br>[[Omron B3G-S series]]
| layouts      = 
| features     = ADDS terminal compatibility
| interface    = RJ-11 male cable non-removable
| rollover     =
| weight       =
| introduced   =
| precedes     =
| supersedes   = 
| price        =
}}

'''NCR 4950''' is a keyboard from [[NCR Corporation|NCR Japan]] which uses a number of switch types.

==Description==
Internally the keyboard seems to be capable of speaking either an ADDS terminal protocol or standard PC AT, depending on how it was configured at the factory; the configuration is set using wire links on the controller PCB.  With the PC/AT-configured model, a simple rewiring of the cable to a 5-pin connector will make the keyboard usable with a modern computer with the assist of a PC AT/USB [[converter]].

The keyboard features a custom layout with no navigation cluster, but a numeric keypad is included.  A horizontal space for a function key template resides at the top.

Two Hi-Tek switch types have been found: two-eye white (shown below) and two-eye black switches that seem to have had the click arm omitted to provide a linear feel.<ref>geekhack — [https://geekhack.org/index.php?topic=37495.0 Hurricane Sandy Keyboard Sale]</ref> There are two other variants using Omrons and SKCL green switches respectively. For the former, at least one example has been spotted using White Omrons<ref>Archive.org - [https://web.archive.org/web/20180417185613/https://www.ebay.com/itm/Vintage-NCR-Workstation-Keyboard-K150V040-/182835638766 April 2018 Snapshot of eBay listing]</ref>.

==Gallery==
===White Hi-Tek switch version===
The controller chip is marked "9308" and one of the support chips (from Hitachi) is marked "3B16" (February in a year ending 3), so this appears to be a early 1993 production.

<gallery widths="250" heights="187">
File:Ncr_4950_top.jpg          | Top
File:Ncr_4950_closeup.jpg      | Bezel removed, showing ADDS or AT configuration
File:Ncr_4950_internals_1.jpg  | Bezel removed, showing location of chart
File:Ncr_4950_internals_2.jpg  | Locations of connector
File:Ncr_4950_internals_3.jpg  | Locations of links for conversion
File:Ncr_4950_internals_4.jpg  | Locations of links for conversion #2
File:Ncr_4950_keycap.jpg       | Hi-Tek switch and keycap
</gallery>
===SKCL green version===
The timestamp on the bottom cases suggested that this keyboard was made in August 1987. No meaningful conclusion about the manufacturer of this board can be drawn at the moment.
<gallery widths="250" heights="187">
File:Top view.jpg| Top view
File:NCR 4950 switches.jpg| SKCL green
File:NCR 4950 SKCL Green timestamp.jpg| timestamp
File:NCR 4950 SKCL green.jpg| Sticker inside
</gallery>

== Converter ==
Switching the board to PC/AT mode can be done via jumpers being installed only in the following locations: JP1-JP4. Soarer's converter can be used with either a teensy or pro micro to internally convert the board to USB. The variant with SKCL green has not been tested with this approach.
{| class="wikitable"
!pin#
!Top
!
|-
|6
|Reset
|Red
|-
|5
|Data
|Green
|-
|4
|Case GND
|
|-
|3
|Clock
|Yellow
|-
|2
|SG GND
|Black
|-
|1
|VCC +5V
|White
|} <ref>Deskthority - [https://deskthority.net/viewtopic.php?f=7&t=19692]</ref>


==References==

<references />

[[Category:Keyboards with Hi-Tek Series 725 switches]]
[[Category:Keyboards with Omron switches]]
[[Category:NCR keyboards]]
[[Category:Hi-Tek OEM keyboards]]
[[Category:List of all keyboards]]
[[Category:Keyboards with NMB switches]]