On Thu, 30 Nov 1995, Ben Kwok-Yiu Li wrote:

> I am trying to get a piece of hardware to work with the Mac interface.
> It is based on the Eye Mouse in a Circuit Cellar a while back.  Do Mac's
> have the same RS232 or is it the RS422 or something completely
> different?  If anybody knows, I am dying to find out!...as project
> deadline approaches quickly.  Also posted before is the alternative to
> the serial, a MIDI interface.  Any help would be greatly appreciated.
>
Hi,
I'm not familiar with the article you mentioned, but if your project
involves a MAC mouse, rs-232 is not the solution.  Macs use the ADB port
(Apple Desktop Bus) for the mouse and keyboard.  It is a clocked TTL
serial bus @ about 1200 baud.  I saw a source listing for the pic
somewhere for ADB.  Try the Microchip BBS.

morris beverly    avpres@world.std.com