Hi, If anyone is interested, I put a link to the ACGNJ article I referenced earlier up my OneDrive. I realized later I made some errors in reading ACIA status bits but it worked as written. Here is the link=> <https://1drv.ms/b/s!AoxC-mzikoIggvgGo8JNquvnpV1Yiw?e=dMs1R4> Regards, Jeff ------------------------------------------------------------------------------------ My first modem was a surplus 300 bps acoustic coupled model I bought at the Trenton Computer Fest around 1978 or 1979. I used it for a few years with my Apple ][+ before I retired it. I was an IBM customer engineer at the time and one of my customers gave me a Bell 212 unit (don’t remember the actual model #) so I upgraded to 1200bps at that time. I used that with a dual serial card for the Apple I built on a proto board to get online and to connect to a serial terminal. I wrote a very small machine language program to redirect the Cin (character in) & Cout (character out) routines to the serial port. The terminal allowed me to view the BBSes at 80x24 rather than the Apple’s 40 column display. Also, the only printer I had at the time was a screen printer attached to the aux port of the terminal so at least I could get a hard copy. The write up was published in the ACGNJ newsletter and Steve Ciarcia even referenced it in a future issue of his “Ask Byte” column in Byte magazine. I was thrilled to have a hardware guru like Steve reference something I built. Jeff