2. Tap out CPM from the main menu.
3. Hit your return.
Bingo! You’re back with the A>! And from there you go on to WordStar, etc.
If you’re using the IBM version of MODEM7, you use the command DOS instead of CPM (unless your menu says otherwise).
TO TRANSMIT MATERIAL ON YOUR DISK WITHOUT ERROR CHECKING—WITHOUT A MODEM7-STYLE PROGRAM AT THE OTHER END
MODEM7 uses the Ward Christensen Protocol—sometimes called the XMODEM Protocol—to help make sure the material is going from computer to computer okay.
If you don’t use error checking in transmitting files, the static on the phone lines may garble some words. Your computer, after all, is just squirting your file over the phone without bothering to find out if the other machine is receiving it right. You want error checking if you’re transmitting or receiving software; just one electronic goof, just a single messed-up “one” or “zero,” can throw the whole program out of whack.
But sometimes, when you aren’t dealing with programs, you’ll want to skip error checking. That way, the transmission will go faster. And it’ll be easier for computers with different communications programs to talk to one another.
There’s still no guarantee you’ll communicate, but with an industry standard like MODEM7 you have a good shot at it.
Here, then, is what you do to send a file to someone without a MODEM7-style program: