mk I just wasted nearly 45 min cussing cause I could not get this setup to send me a debug flag just to find out it was my oscope probe being a putz
so yes you can get a ok set of scope probes from china for less than 20$ with free shipping, but dont take off the spring hook ends cause you will never get them set back on right and they like to wiggle loose, wasting your time
anyway here is a pic
kinda hard to tell whats going on, but on the bread board (the white thing with all the crap on it) the left side under the probe is a attiny84 avr microcontroller hooked up to the mac se's adb port (sitting on the floor) on the right side is a led display so I can output whatever the attiny see's (in 1 byte binary) for debugging, the smaller board on the top left is a bare bones arduino which is acting like a avrisp programmer, which is connected to a PC via serial port so I can wite program data to the tiny's storage
Also you can see a 20$ craftsman multimeter (not the best I have owned but no toy by any means) and a small part of my oscilloscope (that I really wish was a logic analyzer, but at least its got a digital mode with a few KB storage, which would have been retarded expensive back in 1987 when it was made)
not shown is the ps/2 connections, there are 2 of them and the attiny is already fat n happy with those devices and they function perfectly, course I am using someone elses lib so it darn well better lol
sofar with regards to mcu resources I have ps/2 kb and mouse fully working and adb sometimes halfway working, with that going I have about 3k of space used out of the 8k available on the tiny, and I am sucking down about 200KB out of the 512 available memory, though since I have more than enough I will be using a good chunk of it for keyboard scan code conversion in ram vs database for performance and ease of coding
finally I have ~512k of eprom storage on the chip, as a last thing I am planning to write a little simple application for the mac so you can set different settings for the devices, IE 100cpi vs 200cpi mouses, standard vs Enhanced keyboard, and maybe absolute pointing device support, but all of that is at the end of a very long list-o-crap
at the moment Id just be happy to get a mouse working