(┴UTHOR'S NOTE: ╘HIS PUBLIC DOMAIN ARTICLE WAS FIRST PUBLISHED IN THE ┼L-╙HIFT-╧H NEWSLETTER IN ╙EPTEMBER, 1985)
╠AST MONTH, WE CONSTRUCTED AN ╥╙-232 ADAPTER THAT CONVERTED THE ├OMMODORES ╧ TO 5 VOLT LEVELS TO THE NEGATIVE AND POSITIVE LEVELS REQUIRED BY ╥╙-232 DATA COMMUNICATIONS EQUIPMENT (─├┼). ═ODEMS ARE ─├┼S. ╚OWEVER, PRINTERS AND OTHER COMPUTERS ARE DATA TERMINAL EQUIPMENT (─╘┼) AND LAST MONTH'S ADAPTER WILL NOT WORK AS IS. ┬UT BY SWAPPING SOME LINES AROUND, YOU CAN USE YOUR COMPUTER TO TALK TO A PRINTER OR ANOTHER COMPUTER DIRECTLY. ╔F YOU ARE USING A THREE LINE CONNECTION, THEN YOU ONLY HAVE TO SWAP LINES 2 AND 3 AROUND. ╔F YOU HAVE AN ╪-LINE CONNECTION, THEN YOU WILL HAVE TO REDIRECT SIX WIRES. ╘HIS TECHNIQUE IS CALLED A NULL MODEM ADAPTER; ╔ SUSPECT BECAUSE IT ALLOWS YOU TO CONNECT TWO COMPUTERS TOGETHER WITHOUT USING ANY MODEMS. ┘OU WILL NEED TWO PARTS (BESIDES A SOLDERING IRON, SOLDER, SOME WIRE, AND SOME STEADY HANDS): A ─┬-25╨ AND A ─┬-25╙ CONNECTORS. ╘HESE TRANSLATE INTO ╥ADIO ╙HACK PART NUMBERS 276-1 7 AND 276-1548.
╘HE CONNECTIONS ARE AS FOLLOWS:
─┬-25╨ (276-1547) ─┬-25╙ (276-1548)
(MALE) (FEMALE)
1 1
2 3
3 2
4-5 8
6 2╧
7 7
8 4-5
20 6
╘HE DIAGRAM FOR THIS ARTICLE ILLUSTRATES THE SAME CONNECTIONS.
