I think the dclausen.net looks like the best resource -- straight from USB to both the original keyboard and the mouse using a microcontroller, and he makes the source code available. kdbabel looks like a great resource too, but for my purposes I think dclausen.net is exactly what I need.
Thanks mac128dotcom, and thanks everyone else, for all your input! -dave On Mar 11, 2009, at 1:31 PM, Mac128DOTcom wrote: > > Unfortunately the Cassie had NOTHING to do with ADB, it was it's own > proprietary mess that was eventually replaced by ADB. And yes, it was > adapted to run on an old-style Mac which is all they had at the time. > So reverse engineering would be of no use as you'd have to create an > adapter from Cassie to ADB, or USB. > > However, there is no need to reinvent the wheel. THE WORK HAS ALREADY > BEEN DONE FOR YOU. This is not the first time this has come up. > > http://www.kbdbabel.org/ > http://dclausen.net/projects/tfam/ > http://www.flickr.com/photos/daveclausen/sets/72157603702105276 > > Once more for the record, there is NOTHING simple about this. The > Keyboard and mouse are NOT SERIAL devices per RS-232, 422 standards > and use proprietary standards. > > And just for the record, while Microsoft did contribute some of the > underlying code to Applesoft Basic, that was years before the IBM PC > and even more before the advent of PS/2, which was entirely hardware > driven by IBM. None of which influenced Apple's proprietary > implementation of keyboards and Mice which were heavily evolved from > the simple Apple II hardware, not to mention the mouse which Bill > Gates never conceived of until he got his hands on a Lisa years later. > > On Mar 11, 1:53 am, Gregg Eshelman <[email protected]> wrote: >> --- On Tue, 3/10/09, Mac128DOTcom <[email protected]> wrote: >> >> >> >>> Trust others have thoroughly vetted this issue. All of the >>> links on >>> this page point to that. The Mouse and Keyboard were most >>> certainly >>> NOT standard RS-422 serial protocols. They were proprietary >>> designs >>> that relied on bi-directional communication between the >>> device and the >>> computer. PS/2 and ADB on the other hand are dumb devices >>> that simply >>> send data upon request to the computer, which does all the >>> work. There >>> is no simple way to convert them to USB. A proprietary >>> adapter must be >>> built and programmed. Writing a driver that emulates what >>> the 128K Mac- >>> side of the interface did and then convert that into a >>> standard USB interface would be monumental. >> >> This keyboard adapter is interesting. Converts the "Cassie" prototype >> keyboards for use with a 128/512K Mac. >> >> http://www.applefritter.com/node/294 >> >> It converts the prototype 3.5mm stereo jack ADB to the original Mac >> interface. >> >> If there's a way to reverse that design... then you just need an >> ADB to USB converter, which were made by more than one company. >> >> But first you'd have to find someone with one of those cassie >> converters willing to let you pry into its secrets. > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Vintage Macs group. The list FAQ is at http://lowendmac.com/lists/vintagemacs.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/vintage-macs?hl=en Low End Mac RSS feed at feed://lowendmac.com/feed.xml -~----------~----~----~----~------~----~------~--~---
