--- 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 -~----------~----~----~----~------~----~------~--~---
