ÃÏÎÓÔÒÕÃÔÉÏÎ ÏÆ Á ÎÕÌÌ ÍÏÄÅÍ ÁÄÁÐÔÅÒ BY ÄOUG ÒEED (ÁUTHOR'S NOTE: ÔHIS PUBLIC DOMAIN ARTICLE WAS FIRST PUBLISHED IN THE ÅL-ÓHIFT-ÏH NEWSLETTER IN ÓEPTEMBER, 1985) ÌAST MONTH, WE CONSTRUCTED AN ÒÓ-232 ADAPTER THAT CONVERTED THE ÃOMMODORES Ï TO 5 VOLT LEVELS TO THE NEGATIVE AND POSITIVE LEVELS REQUIRED BY ÒÓ-232 DATA COMMUNICATIONS EQUIPMENT (ÄÃÅ). ÍODEMS ARE ÄÃÅS. ÈOWEVER, PRINTERS AND OTHER COMPUTERS ARE DATA TERMINAL EQUIPMENT (ÄÔÅ) AND LAST MONTH'S ADAPTER WILL NOT WORK AS IS. ÂUT BY SWAPPING SOME LINES AROUND, YOU CAN USE YOUR COMPUTER TO TALK TO A PRINTER OR ANOTHER COMPUTER DIRECTLY. ÉF YOU ARE USING A THREE LINE CONNECTION, THEN YOU ONLY HAVE TO SWAP LINES 2 AND 3 AROUND. ÉF YOU HAVE AN Ø-LINE CONNECTION, THEN YOU WILL HAVE TO REDIRECT SIX WIRES. ÔHIS TECHNIQUE IS CALLED A NULL MODEM ADAPTER; É SUSPECT BECAUSE IT ALLOWS YOU TO CONNECT TWO COMPUTERS TOGETHER WITHOUT USING ANY MODEMS. ÙOU WILL NEED TWO PARTS (BESIDES A SOLDERING IRON, SOLDER, SOME WIRE, AND SOME STEADY HANDS): A ÄÂ-25Ð AND A ÄÂ-25Ó CONNECTORS. ÔHESE TRANSLATE INTO ÒADIO ÓHACK PART NUMBERS 276-1547 AND 276-1548. ÔHE CONNECTIONS ARE AS FOLLOWS: ÄÂ-25Ð (276-1547) ÄÂ-25Ó (276-1548) (MALE) (FEMALE) 1 1 2 3 3 2 4-5 8 6 2Ï 7 7 8 4-5 20 6 ÔHE DIAGRAM FOR THIS ARTICLE ILLUSTRATES THE SAME CONNECTIONS.