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Conference hydra::amiga_v1

Title:	AMIGA NOTES
Notice:	Join us in the NEW conference - HYDRA::AMIGA_V2
Moderator:	HYDRA::MOORE

Created:	Sat Apr 26 1986
Last Modified:	Wed Feb 05 1992
Last Successful Update:	Fri Jun 06 1997
Number of topics:	5378
Total number of notes:	38326

549.0. "Amiga 500 Serial Port question with DF124" by ESD30::CHAVIS (They laughed when I sat at the keyboard) Fri Jun 12 1987 11:30

    
    I got an AMIGA 500 yesterday.   After I set it up I tried to 
    run a terminal emulator package I had.   I noticed that the
    SEND light on the modem was on.   I logged into a system
    and was only able to recieve not send to the system.  Im
    using a DF124 with a standard DEC modem cable.  The 500 is
    suppose to have a standard RS-232C port verus the 1000 witch needed
    a special serial cable.   The pinouts for the 500's serial port
    are
    
    		PIN	SIGNAL
    	         1       GND
                 2       TXD
                 3       RXD
                 4       RTS
                 5       CTS
                 6       DSR
                 7       GND
                 9       +12		(Are these hooked up in a DEC
                 10      -12             modem cable?)
                 18      Audio
                 20      DTR
                 22      RI
    
    All the important signals match up with what my DF124 expects so
    Im confused why things are not working.   Anyone got any ideas?
    
    Thanks
    Ira Chavis

T.R	Title	User	Personal Name	Date	Lines
549.1	CAUTION	AUTHOR::MACDONALD	WA1OMM Listening 224.28	`Fri Jun 12 1987 12:38`	6
	CAREFUL! Amiga cabling has voltage which can damage peripherals you might connect particularly through the RS232 port. Make sure you connect only the required comm pins and not those carrying voltage. Read the Manual that comes with the Amiga. Paul
549.2		ESD30::CHAVIS	They laughed when I sat at the keyboard	`Fri Jun 12 1987 13:11`	5
	I read a note that said to first try cutting pins 9 and 10 which carry +/- 12 volts. Ill see what happens. Ira
549.3		BAGELS::BRANNON	Dave Brannon	`Fri Jun 12 1987 14:04`	7
	i just have pins 1-8 and 20 connected, works fine with a DF03. According to comments on Usenet, the 500 does have power on the same pins as the 1000 - just minimal power, enough to power Digi-View but not enought to harm peripherals connected to those pins. -dave
549.4	wrong port	HYSTER::DEARBORN	Trouvez Mieux	`Fri Jun 12 1987 15:51`	2
	digi-View uses the parallel port.
549.5	DF124 and A1000	TEACH::ART	Art Baker, DC Training Center (EKO)	`Fri Jun 12 1987 16:29`	11
	I've been using a DF124 with my A1000 for awhile now. The cable I wired up has only pins 2,3, & 7 connected (i.e. transmit data, receive data, and signal ground). I've used this arrangement with several other modems and serial devices and it's never caused any problems. Just be sure you force the assertion of DTR inside the modem (one of switches on switchpack-3, if I remember rightly). -Art
549.6	Finally works!	ESD30::CHAVIS	They laughed when I sat at the keyboard	`Tue Jun 16 1987 09:53`	8
	I finally got the serial port to work. After constructing a cable with pins 1-8 and 20 only, I determined that the port was shot. I returned the A-500 and got a new one. All works well now. The A-500 serial port is somewhat standard I guess. A BC22-E cable will work fine. Thanks for all the help, Ira