Path: utzoo!attcan!utgpu!news-server.csri.toronto.edu!mailrus!hellgate.utah.edu!cs.utexas.edu!samsung!munnari.oz.au!uhccux!catfish!jwright From: jwright@cfht.hawaii.edu (Jim Wright) Newsgroups: comp.sys.amiga Subject: Re: amiga keyboard Message-ID: Date: 2 Sep 90 13:22:32 GMT References: <28717@nigel.ee.udel.edu> <3261@dftsrv.gsfc.nasa.gov> Sender: news@uhccux.uhcc.Hawaii.Edu Lines: 94 xrtnt@amarna.gsfc.nasa.gov (TZENG, NIGEL) writes: >JMPIERCE%USMCP6.BITNET@vm.tcs.tulane.edu (JIM PIERCE) writes... >> I've seen several magazine discussions about A2000 keyboard on an A1000. >There was a post here a few months >back on the pin outs that I will try to find. If I didn't save it I can go >to my parents house and look at it (That wouldn't be for a month or so). Haven't had a chance to try this yet, but I did save the article. Looks pretty easy. | From: davidc@pyr.gatech.EDU (DAVID CARTER) | Newsgroups: comp.sys.amiga | Subject: Adaptor to use 2000 keyboard on 1000 (here's how) | Date: 13 May 90 05:42:24 GMT | | The usual disclaimers about voiding warranties and "It's not my fault if you | torch your Amiga (or keyboard)" apply here. | | This is a VERY easy project. The parts should cost about $6, and no more | than $10 even if you include a small box. | | The parts are: a 5-pin DIN socket (2000 keyboard plugs into this) and a | piece of 4-conductor modular telephone cable with a "4-4" modular handset | plug at one end. | | There is one aspect that makes it potentially dangerous (to your keyboard, | at least): | | If for whatever reason you get the modular plug backwards, you will | be reversing the +5v and ground connections going to the keyboard! | | Using a cable with a modular plug at one end and bare wires at the other | (which you solder to the 5 pin DIN socket) will prevent you (or anyone | else) from ever substituting another modular cable that might be wired | backwards. | | | Here are the pin assignments for the connectors: | | The 2000's Keyboard Plug is a male 5 pin DIN connector. The diagram here is | looking at the solder side (back) of the female part -- what you'll have to | buy to plug the keyboard into. On mine, the numbers are written on the | plastic on the back, next to each pin. | | 2 | 5 4 Female 5-pin DIN socket, | 3 1 looking at rear (solder pins) | | 6 | | Pin Signal Description | --- ------ ----------- | 1 KBCLK Keyboard Clock | 2 KBDATA Keyboard Data | 3 NC Not Connected | 4 GND ground | 5 +5v +5 volt power | 6 SHIELD shield (coiled cable and keyboard metal chassis) | | | To determine the pin assignments for the 1000, prepare the modular cable: | Plug on one end, stripped leads at the other end, ready to be soldered onto | the DIN socket. Arrange the loose ends flat; that is, in exactly the same | order right-to-left as they go into the modular plug. You can look through | the clear plastic of a modular plug at the wire colors to check the order. | | Plug this cable into the 1000, make sure none of the wires are touching | anything, and power on the computer. Determine the polarity of the | voltage across the OUTER two wires. One wire is ground, the other is +5 | volts. When you know which is which, you'll also know the assignments | of the two middle wires: | | KBCLK is the wire next to +5, and KBDATA is the one nearest Ground. | | So the modular cable will look like this (possibly upside down): | | +5 KBCLK KBDATA Ground | | Connect each of these to the respective pin on the DIN socket. You might | also want to wire the socket's shield pin to a shield connection somewhere | on the Amiga. | | That's it. If you have any questions, be sure to use the "reply-to" | address (also listed below). | | | David Carter | uucp: ...!{decvax,hplabs,ncar,purdue,rutgers}!gatech!prism!gtnetdc | Internet: gtnetdc@prism.gatech.edu | -- Jim Wright jwright@quonset.cfht.hawaii.edu Canada-France-Hawaii Telescope Corp.