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{{infobox dkeyboard | image name = BTC 8120 -- split.jpg | manufacturer = [[BTC]] | switch = [[BTC dome with slider]] | layouts = Modified [[ISO]], modified [[Focus layout]] | weight = 1214 g (example 1)<br>1265 g (example 2) | years = | keycaps = | fcc = E5XKBP10910U | features = [[Erase-Eaze]], [[tenting]] | dimensions = 500 × 245 × 41 mm }} '''8120''' is a model of [[ergonomic keyboard]] from [[BTC]] with BTC dome with slider switches. ==Description== BTC 8120 is a split-body ergonomic keyboard: the two sides snap together, and can be pulled apart to allow them to be positioned and angled separately. Each side has two dual-height feet with screw-out posts at the rear and two screw-out feet at the front to provide tenting in a variety of angles, including both front-to-back and sideways negative tilt on each side. The keyboard case is shaped so that the bottom parts serve as built-in wrist rests on each side. An integrated cable with 25 or 26 conductors connects the matrix wiring and the electromagnetic shielding on each side. This cable terminates internally in each side with two plugs, one 15-way and one 10-way; the 15-way plug is fully populated, while the 10-way plug may only use nine of the positions (this is not clear from the photographs). The grounding conductor is separate. The layout is non-standard, and is based (depending on target locale) on [[ISO]] and the [[Focus layout]]. Most of the navigation cluster is moved to the top above and to right of the function keys, but arrow keys are brought in closer and duplicated on the left-hand side. The space bar is split, providing [[Erase-Eaze]]: the left side of the space bar functions as backspace. The label cites US patent 5143462, for Erase-Eaze. Both examples below use [[BTC dome with slider]] switches; the second example is demonstrated to use a PCB. The 8210 specification sheet posted to the BTC website cites the "switch activation mechanism" as "Membrane", which could either be plain rubber dome as in the [[BTC 8110M]], or it could be the membrane version of BTC dome with slider. A limited amount of thin foil appears to offer some kind of electromagnetic shielding. The manual below gives the tactile force as 60±20 g, while the specification sheet online gives 55±20 g. ==Gallery== ===Example 1=== Example with FCC ID. <gallery widths=250px heights=187px> File:BTC 8120 front.JPG | Top File:BTC 8120 back.jpg | Back with extended flip-feet File:BTC 8120 label.jpg | Label with FCC ID File:BTC 8120 switch.JPG | BTC dome with slider File:BTC 8120 flip feet2.jpg | Adjustable flip-foot File:BTC 8120 box.jpg | Keyboard box </gallery> ====Manual==== <gallery widths=250px heights=187px> File:BTC 8120 Manual.jpg | Manual cover File:BTC 8120 Manual P1.jpg | Introduction File:BTC 8120 Manual P2.jpg | Contents File:BTC 8120 Manual P3.jpg | Recommended Guides at Work File:BTC 8120 Manual P4.jpg | Erase-Eaze™ Feature & Installation File:BTC 8120 Manual P5.jpg | Technical Specifications </gallery> ===Example 2=== This example is from 1996, and does not provide an FCC ID. <gallery widths=250px heights=187px> File:BTC 8120 -- top.jpg | Top File:BTC 8120 -- angled.jpg | Angled File:BTC 8120 -- split.jpg | Split File:BTC 8120 -- bottom.jpg | Bottom File:BTC 8120 -- rear label.jpg | Rear label File:BTC 8120 -- keycap detail.jpg | Keycap detail File:BTC 8120 -- LHS top cover with sliders.jpg | Left-hand top cover File:BTC 8120 -- RHS top case with some sliders.jpg | Right-hand top cover File:BTC 8120 -- internals.jpg | Internals File:BTC 8120 -- dome sheets left.jpg | Left-hand dome sheets File:BTC 8120 -- dome sheets, right.jpg | Right-hand dome sheets; note the alternative material for the numeric keypad File:BTC 8120 -- LHS PCB with foil.jpg | Left-hand (primary) PCB with foil File:BTC 8120 -- LHS PCB.jpg | Left-hand PCB, dated 9638; the controller is dated 9611 File:BTC 8120 -- RHS PCB with foil.jpg | Right-hand (secondary) PCB with foil File:BTC 8120 -- RHS PCB.jpg | Right-hand PCB, dated 9638 File:BTC 8120 -- sliders.jpg | Sliders </gallery> ==See also== *[[BTC 8110M]] — non-split model with membrane switches ==External links== *BTC — [http://www.btc.com.tw/pdf/8120.pdf BTC 8120] (specification sheet) *KBtalKing — [http://kbtalking.cool3c.com/article/25036 ⊙c⊙BTC-8120導電橡膠分離式人體工學鍵盤⊙c⊙] [[Category:BTC keyboards]] [[Category:Ergonomic keyboards]] [[Category:Keyboards with Erase-Eaze]] [[Category:List of all keyboards]]
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