Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!wuarchive!mit-eddie!uw-beaver!ubc-cs!alberta!ami-cg!cg From: cg@ami-cg.UUCP (Chris Gray) Newsgroups: comp.sys.amiga.hardware Subject: Re: Serial Cards Message-ID: Date: 22 Feb 91 01:18:28 GMT References: <1991Feb19.225431.17057@comspec.uucp> Organization: Not an Organization Lines: 58 In article <1991Feb19.225431.17057@comspec.uucp> darrell@comspec.uucp (Darrell Grainger) writes: > I have looked at the ASDG dual serial card and have talked to the people at >Commodore Canada about their serial card. > > Both appear to be comparible to the serial port on the motherboard but lack >one important thing. From what I could tell they are all DB9 serial ports. >This tends to mean that some of the lines necessary for hardware handshaking >are missing. > > For the USRobotics HST 14400 I would expect you to need the following lines: > > 2 TxD Transmit Data > 3 RxD Received Data > 4 RTS Request To Send > 5 CTS Clear To Send > 6 DSR Data Set Ready > 7 GND Signal Ground > 8 CD Carrier Detect >12 SI Speed Indicator >20 DTR Data Terminal Ready >22 RI Ring Indicator > > If all but the SI line was support it would be okay. > > In addition to the chance of one or more of these lines missing, Commodore >Canada and the ASDG literature indicated that 19200 bps was all they would >recommend these boards for. The 14400 HST should be set for a terminal to >modem speed of 38400. > > Is anyone at Commodore US reading this? Can you give me a little more >confidence in you serial board? Well, the ASDG board should do the trick then. From their documentation, here is the pinout: 1 - DCD 2 - RXD 3 - TXD 4 - DTR 5 - GND 6 - DSR 7 - RTS 8 - CTS 9 - RI (I was just building a cable this afternoon, so I had it handy :-) ) Also, the data rate list contains: 110, 300, 1200, 2400, 4800, 9600, 19200, 31250(MIDI), 38400, 57600, 76800. I haven't really stressed it much (1200 baud modem on one port, 19200 bps terminal on the other), but I didn't read anything that indicated it wouldn't work. Using it with a 68020 or 68030 would likely work better than with a 68000 for high speeds. -- Chris Gray usenet: alberta!ami-cg!cg CIS: 74007,1165