Today, I sucessfully made a small app for System 7 that sends a signal of controllable length to the modem serial port. I need it for a precise (millisecond or lower range) usage as a switch of another circuit involving a capacitor. I used a Mac Classic and I can produce very consistent peaks of signal that I watch with an electronic oscilloscope.
Doing the same thing, say, in visual basic 6 in windows 2000 produces really inconsistent results that vary widely (changes the length of the peak to a factor of 10 less or more).
Using THINK C, I produced something fairly quickly even though I never programmed with serial ports in mind.
Doing the same thing in OSX would have involved having a modern mac, which I don't have, and digging deep in tons of very technical manuals to get what I needed.
Doing the same thing, say, in visual basic 6 in windows 2000 produces really inconsistent results that vary widely (changes the length of the peak to a factor of 10 less or more).
Using THINK C, I produced something fairly quickly even though I never programmed with serial ports in mind.
Doing the same thing in OSX would have involved having a modern mac, which I don't have, and digging deep in tons of very technical manuals to get what I needed.