Title  Last Comment
tput and stty  
- tput and stty are related in the sense that they both have to do with how a Unix terminal behaves. Tput is perhaps less important than it used to be, but still useful -

Serial Printers  
- The secret to success with printers on serial ports is understanding that the computer and the printer must agree on baud rate and flow control -

Local printing in Synchronics   2012/03/07 anonymous
- I know exactly what he has - an old SCO Unix system with a Digiboard multiport serial board, green screen Wyse terminals and Okidata printers with serial cards. I can handle all of that. -

A SCO Openserver to Red Hat Linux Conversion   2011/04/02 TonyLawrence
- A detailed history of a SCO to Linux Conversion - including desktop users. -

Digiboard Port Server changes tty device permissions  
- Earlier this week, one of those customers called with a problem of changing perms on his /dev/tty* devices. He needs them set with write permission (666), but some were seemingly randomly resetting to 600. -

No more Parallel/Serial?  
- Is parallel port printing gone? If not, it certainly will be soon as USB replaces all of it. A PCI card can be a replacement, but not always. -

Serial Printer  
- I assume you verified that the serial data format being used agrees with the printer. Also, if the LQ 2170 is set to one line buffer mode you will need to implement hardware handshaking. -

Strange Terminal Emulation problem  
- Here is a very odd terminal emulation problem that I never did figure out - it still has baffled. -

Digiboard Serial Ports on Linux Servers  
- This customer has an 56K DDS line under contract for a few more years so we went with a Digi C/X controller to match what was in their SCO server. -

IXANY   2010/02/25 anonymous
- Rapidly fading from having any importance to the average user, these have to do with software flow control. This was once very important for terminal users, and still does have importance for any serial device you may be using (printer, bar code reader, etc.) -

Device::SerialPort on Redhat 8  
- Since each building has a T1 router, I wrote a small program to log the routers messages to a text file. While performing these upgrades, I ran into some small trouble with my code, which relies on the perl module: "Device::SerialPort". -

Log Serial Port Data to a Specified Logfile   2013/03/29 TonyLawrence
- I wrote this script to capture log data from our T1 routers for debugging purposes. -

RS232 Wiring Diagrams  
- Color coded diagram for understanding RS232 EIA-232 Wiring pinouts printers, terminals and modems. DB9 and DB25. -

Installing an Equinox SST-64 under Linux  
- After 15-20+ hours work I got my Equinox sst-64 pci card working. I'm sending info on what I did in case it is useful to others. -

Qume Serial X-Terminal  
- The QX15 provides a standard serial terminal that also has the ability to run (monochrome) X-Windows. -

serial printer hold open scripts with 'cat'  
- It would be even better if there was an input source which the kernel guaranteed to allow you to open, but which never produced any input. Similar to /dev/null, but it should never return from read(). -

wiring for apc ups cables smart ups uninterruptible powersupply -->APC UPS Cable wiring  
- It's another day in UPS hell. For the zillionth time, I find yet -

(SCO Unix)What do the terms UART, 8250, 16450 and 16550 mean?  
- (SCO Unix) UART means Universal Asynchronous Receiver/Transmitter. This is a chip which receives and transmits data serially; each serial port you have will use one, though it is possible that several may be integrated into one chip. -

(SCO Unix)Where do I get zmodem? 2013/08/13 TonyLawrence
- zmodem is an old file transfer protocol. This is an old article about SCO Unix and is only left here for historical purposes. -

 
 











 
 
(SCO Unix)I've set the modem for 38400 in inittab, but stty shows it at some other speed  
- Configuring modems for uucp on SCO Unix: You have a line in /usr/lib/uucp/Devices that references that modem line at some other speed, and the getty program is looking at that. -

(SCO Unix)Why can't I get my dialin modem to work above 9600 baud?  
- (SCO Unix) Because you need the modem speed in /etc/inittab to match the DTE rate that the modem is set for. -

(SCO Unix)Will a Winmodem work?  
- This is an old article about Winmodem usage on SCO Unix and is only left here for historical purposes. -

(SCO Unix)What are some common settings for my modem?  
- (SCO Unix) This is an old article about serial dial-up modems and is only left here for historical purposes. -

(SCO Unix)I can't get shared dial-in and dial-out working  
- (SCO Unix) Here are a few things to keep in mind. Under Unix, the entries in /etc/inittab and /usr/lib/uucp/Devices must match exactly; if one says "ttyi3" while the other says "/dev/ttyi3", getty won't consider them to be the same port, and your modem will not be sent the undialer string. -

(SCO Unix)I edited my gettydefs and things broke  
- (SCO Unix) You can check gettydefs using /etc/getty -c /etc/gettydefs; this command will print out everything you could possibly want to know. -

(SCO Unix)Where can I get more information on UUCP protocols?  
- (SCO Unix) Where can I get more information on UUCP protocols? -

(SCO Unix)A BSD-based machine can't connect to mine via UUCP  
- (SCO Unix) A BSD-based machine can't connect to mine via UUCP -

(SCO Unix)My data-compressing modem doesn't work much faster than my old modem  
- (SCO Unix) My data-compressing modem doesn't work much faster than myold -

(SCO Unix)How do I maximize serial throughput?  
- This is an old article about serial throughput on SCO Unix and is only left here for historical purposes. -

(SCO Unix)What are all the V.something codes, MNP, HST, etc.?  
- (SCO Unix) What are all the V.something codes, MNP, HST, etc.? -

(SCO Unix)What special considerations are there regarding my Telebit modem?  
- (SCO Unix) This is an old article about Telebit modems and is only left here for historical purposes. -

(SCO Unix)How do I change uucico's packet timeout?  
- This is an old article about uucico's packet timeout on SCO Unix and is only left here for historical purposes. -

(SCO Unix)UUCP frequently has to resend packets  
- This is an old article about UUCP errors on SCO Unix and is only left here for historical purposes. -

(SCO Unix)I increased my window size and UUCP broke!  
- (SCO Unix) If your modem, or the modem on a remote site, has small data buffers, a large window size may cause the modem's buffers to overrun. If the site that broke polls your system, you may wish to create a separate copy of uucico with a smaller window size, and specify it as the login shell in /etc/passwd. -

(SCO Unix)I increased my window size but nothing changed  
- This is an old article about uucp window sizing in SCO Unix and is only left here for historical purposes. -

(SCO Unix)How do I change uucico's window size?  
- This is an old article about SCO Unix uucp and is only left here for historical purposes. -

(SCO Unix)How do I get better UUCP throughput?  
- This is an old article about UUCP throughput on SCO Unix and is only left here for historical purposes. -

(SCO Unix)I can transfer small files via UUCP but large ones won't go  
- This may indicate a flow control problem. uucico, the program that actually performs UUCP transfers, turns off all hardware and software flow control on the port it is using. -

(SCO Unix)How do I adjust my 16550's trigger level?  
- This is an old article about RS232 drivers in SCO Unix and is only left here for historical purposes. -

(SCO Unix)My serial connections are losing characters  
- This is an old article about serial connections losing characters on SCO Unix and is only left here for historical purposes. -

Set and retain ownership and permissions on tty files  
- You'll need to disable the tty(s) from login before using chmod or chown. You also may want to modify /etc/conf/node.d/cn (SCO Unix). -

serial port nclist out of clists -->Re CONFIG putc -out of clists  
- serial port nclist out of clists -->Re: CONFIG: putc -out of clists -

Serial Wiring  
- This is an old article about RS232 serial wiring for dumb Terminals and is only left here for historical purposes. -

Understanding Serial Wiring  
- I have seen intelligent adult human beings brought to the very edge of insanity by the (anticipated) simple connection of a terminal or a serial printer to a Unix system. -

 
 
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