Editing Zenith Supersport SX

{{infobox dkeyboard
| name         = 
| image name   = Zenith Supersport SX -- opened.jpg
| pn           = 
| fcc          = 
| branding     = [[Zenith Data Systems]]
| manufacturer = [[Alps Electric]]?
| switch       = [[Alps integrated dome]]
| layouts      = 
| features     = [[Pad lock]]
| interface    = Direct matrix
| weight       = 
| introduced   = 1989<ref name="comphist" />
| price        = $6000<ref name="comphist" /> (for the whole notebook)
| switch mount = [[PCB mount]]
| rollover     = [[NKRO]]
}}

'''Zenith Supersport SX''' (branded approximately as "supersPORT SX", also transcribed "SuperSport") was a 386 notebook computer in the Supersport range from [[Zenith Data Systems]].

==Description==
The Supersport SX was introduced in 1989 and featured a keyboard with tactile [[Alps integrated dome]] switches with [[double-shot molding|double-shot]] [[keycap mount#Alps mount|Alps mount]] [[keycap]]s. Keycaps with two legend colours use locally coated [[keycap printing|pad printing]] for the additional colours.

The keyboard features [[Rollover, blocking and ghosting|n-key rollover]] using [[diode]]s. The keyboard [[PCB]] contains only the switches, diodes and [[lock key|lock]] [[LED]]s, with the controller itself on the motherboard. This makes the keyboard ideal for [[keyboard controller|controller]] replacement. The rear of the PCB bears Alps branding, suggesting that they manufactured the entire keyboard assembly.

The variant of the Alps integrated dome switch found in the Supersport SX has a gentle metallic sound and a positive tactile feel, around 65 cN. The tactility is crisp and precise.

The keyboard features an embedded [[numeric keypad]] with a [[pad lock]] key, giving it four LEDs instead of the usual three. The [[function keys]] stop at F10; F11 and F12 are only available on the [[Zenith ZA-180-89]] external numeric keypad.

==Other variants==

The earlier Zenith SupersPORT 286 was identical in almost every way, but featured a slower 80286 CPU. This model was also sold by AEG Olympia as "Olyport 40".

==Keyboard matrix & controller replacement==

The keyboard uses a 10 columns by 8 rows matrix, with diodes mounted so rows are positive and columns negative. This is important if you are using hasu's firmware for the Teensy, since hasu's TMK code assumes negative rows and positive columns; in this case you'll need to enter the columns as rows and rows as columns for the firmware to work with the keyboard.

A 24-lead flat flex cable (1.25mm pitch) connects the keyboard PCB to a controller on the motherboard, with the following pins:

* Pin 0: unused
* Pin 1: VCC, used for the LEDs
* Pin 2-5: LEDs (-)
* Pin 6-15: columns (-)
* Pin 16-23: rows (+)

{| class="wikitable"
|-
!  !! '''Col''' !! '''0''' !! '''1''' !! '''2''' !! '''3''' !! '''4''' !! '''5''' !! '''6''' !! '''7''' !! '''8''' !! '''9'''
|-
| '''Row''' || Pin# || 6 || 7 || 8 || 9 || 10 || 11 || 12 || 13 || 14 || 15
|-
| '''A''' || 16 || ESC || F1 || F2 || F3 || F4 || F5 || F6 || F7 || F8 || F9
|-
| '''B''' || 17 || BSLS || 1 || 2 || 3 || 4 || 5 || 6 || 7 || 8 || F10
|-
| '''C''' || 18 || TAB || Q || W || E || R || T || Y || U || 9 || NLCK
|-
| '''D''' || 19 || LCTL || A || D || F || G || H || J || I || 0 || PAUS
|-
| '''E''' || 20 || LSFT || S || V || B || N || M || K || O || MINS || INS
|-
| '''F''' || 21 || Z || X || SPC || UP || RALT || COMM || L || P || EQL || DEL
|-
| '''G''' || 22 || CAPS || C || ''no'' || LEFT || RCTL || DOT || SCLN || LBRC || PSCR || BKSP
|-
| '''H''' || 23 || FN0 || LALT || DOWN || RGHT || RSFT || SLSH || QUOT || RBRC || ENT || NONUS_BSLASH
|}

==Gallery==
<gallery widths=250px heights=187px>
File:Zenith Supersport SX -- top.jpg                           | Supersport SX closed
File:Zenith Supersport SX -- opened.jpg                        | Lid open
File:Zenith Supersport SX -- embedded numeric keypad.jpg       | Embedded numeric keypad
File:Zenith Supersport SX -- double-shot keycaps.jpg           | Double-shot keycaps
File:Zenith Supersport SX -- pad-printed colours.jpg           | Pad-printed secondary colours
File:Zenith Supersport SX -- Alps keycap compatibility.jpg     | Matias keycaps fitted to demonstrate that the switches are Alps mount
File:Zenith Supersport SX -- disassembled.jpg                  | Disassembled to show keyboard assembly
File:Zenith Supersport SX -- keyboard assembly, top.jpg        | Keyboard assembly; the keyboard is attached to the computer using metal plates screwed onto the PCB
File:Zenith Supersport SX -- foam layer.jpg                    | Foam layer between the keycaps and PCB
File:Zenith Supersport SX -- Alps integrated dome switches.jpg | Alps integrated dome switches
File:Zenith Supersport SX -- diodes.jpg                        | Diodes for n-key rollover
File:Zenith Supersport SX -- shield plate.jpg                  | Shield plate on the rear
File:Zenith Supersport SX -- shield plate bonding.jpg          | Shield plate bond
File:Zenith Supersport SX -- insulating layer.jpg              | Insulating layer between the shield plate and PCB
File:Zenith Supersport SX -- enter key stabiliser base.jpg     | The Enter key stabiliser arrangement is very difficult to reassemble
File:Zenith Supersport SX -- PCB.jpg                           | Alps branded PCB 
</gallery>

==References==
<references>
<ref name="comphist">Computing History — [http://www.computinghistory.org.uk/det/7112/Zenith-SupersPORT-SX/ Zenith SupersPORT SX] Retrieved 2015-07-09.</ref>
</references>

[[Category:Zenith keyboards]]
[[Category:Alps OEM keyboards]]
[[Category:Computers]]
[[Category:Keyboards with Alps integrated dome switches]]
[[Category:Vintage keyboards]]
[[Category:Integrated keyboards]]
[[Category:List of all keyboards]]