My first Hypercard project was a control system for up to 156 cassette decks run by a little Mac SE (later a IIci) back in 1989 at A&M Studios. The only way to do that was to use the serial port at the mac end and a CY232 chip from Cybernetics at the hardware end. I got serial XCMDs off of Genie and other BBs, and eventually used Hyperbasic and Compilit to speed things up...
Another mac in the room drove a printer system to make the cassette labels -- 6 Epson impact printers with buffers and switching. What a trip that was. It took a lot of delays and trickery to get those damn ports to work right. I also designed all the analog and digital hardware and scanning concept.
http://barncard.com/amstudios/htdoc/Pages/TC.html
I don't know why I asked which one.
On DB9 and DB25, if you don't need handshaking, just connect pin 2 to pin 3. If you need handshaking on DB9, connect 7 to 8, and pin 4 to 6 and 1. If you need handshaking on DB25, uh, I forgot--I can look it up.
On the Mac DIN, you get an old mac serial cable and cut it. Strip the wires. Find those that go to certain pins and then solder or connect together like this:
Pin 3 to 5 Pin 6 to 8
This takes two because the signal is on two wires and not one.
If you need handshaking, try 1 to 2. I have not done that.
If you blow something up, uh, somehow it is not my fault. There are lots of web pages that have info on this; double check with those.
Dar Scott
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