jgreco@archimedes.math.uwm.edu (Joe Greco) (08/13/90)
In comp.dcom.modems article <1990Aug11.012031.28192@agate.berkeley.edu>, laba-3eh@web.berkeley.edu (Eric van Bezooijen) wrote: :I own a commodore 128, and I just borrowed (permanently) a SMARTteam :103/212A modem (hayes compatible). : :I want to make a cable from the data port of the modem to the user I/O :port to the commodore... The Commodore manual says you can stick a :modem there, so that is what I intend to do, and I do not want to spend :50 bucks buying a cable, so I wanted to make one myself. : :The user I/O port has 24 pins, and the configuration is as follows in the :manual : : [........] : :Now the problem arises when I try to figure out what the hell these abbreviations :mean.. I mean, I know what GND, 9 VAC, and +5V mean, of course, but what does :PB5, SP2, and PC2 stand for? Could anyone de-mistify these terms? The Commodore User port's a parallel port. Some rudimentary software in the machine can make it look like a serial port. Therefore the parallel port terms are irrelevant. However - the port operates at +5v voltage levels, whereas most modems prefer (and output) +/-12v. You'll need to make a converter. If you're not at all into electronics, this is the time to post to 'comp.sys.cbm' and ask where you can get a cheap prebuilt interface. :Does ANYONE knopw how to match these two ports up correctly? If so, please :mail to laba-3eh@web.berkeley.edu, and I will be eternally grateful. Personally, having made two of the above-mentioned interfaces, I'd say it's less trouble to shell out about $30 and get a real interface. Mail me for future discussion, if any, I don't regularly read comp.dcom.modems. ... Joe cc: laba-3eh@web.berkeley.edu ------------------------------------------------------------------------------- Joe Greco - University of Wisconsin, Milwaukee - Department of Mathematics jgreco@archimedes.math.uwm.edu USnail: Joe Greco Voice: 414/321-6184 9905 W. Montana Ave. Data: 414/321-9287 (Happy Hacker's BBS) West Allis, WI 53227-3329 #include <witty_and_humorous_saying.h> Disclaimer: I don't speak for the Math Department, the University, or myself.