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Full Discussion: Serial Lines Explained
Top Forums UNIX for Dummies Questions & Answers Serial Lines Explained Post 302930455 by sreyan32 on Sunday 4th of January 2015 11:15:36 AM
Old 01-04-2015
Okay from what I have read in this thread I can understand that in the older days you would have a monitor and a keyboard with a serial port connecting to the central CPU. You would communicate with the CPU using signals sent via the serial port. I know this is an over simplification but is it correct ?

Can someone explain how serial ports can be used for session control in a little more detail ?

What baffles me is that is why still use serial ports ? Why not remove them ? On a normal desktop or laptop serial ports are not used the way they were used back in the olden days, so keep them ?

For example as Corona688 mentioned in a earlier thread
stty still gives the baud rate. This is not required so why still keep it.

Why adopt an old standard forcefully when it is not required is my point
 

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UPLCOM(4)						   BSD Kernel Interfaces Manual 						 UPLCOM(4)

NAME
uplcom -- USB support for Prolific PL-2303/2303X/2303HX serial adapters driver SYNOPSIS
To compile this driver into the kernel, place the following lines in your kernel configuration file: device uplcom device ucom Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5): uplcom_load="YES" DESCRIPTION
The uplcom driver provides support for various serial adapters based on the Prolific PL-2303, PL-2303X and PL-2303HX USB-to-RS232 Bridge chips. The device is accessed through the ucom(4) driver which makes it behave like a tty(4). HARDWARE
The uplcom driver supports the following adapters: o ATEN UC-232A o BAFO BF-800 o BAFO BF-810 o Belkin F5U257 o ELECOM UC-SGT o HAL Corporation Crossam2+USB IR commander o Hama USB RS-232 Serial Adapter o Hamlet exagerate XURS232 o IOGEAR UC-232A o I/O DATA USB-RSAQ o I/O DATA USB-RSAQ2 o I/O DATA USB-RSAQ3 o Mobile Action MA-620 Infrared Adapter o PLANEX USB-RS232 URS-03 o RATOC REX-USB60 o Radio Shack USB Serial Cable o Sandberg USB to Serial Link (model number 133-08) o SOURCENEXT KeikaiDenwa 8 (with and without charger) o Sony Ericsson USB Cable (Susteen USB Data Cable) o Willcom W-SIM DD PHS terminal.(WS002IN) SEE ALSO
tty(4), ucom(4), usb(4) HISTORY
The uplcom driver appeared in NetBSD 1.6. This manual page was adopted from NetBSD by Tom Rhodes <trhodes@FreeBSD.org> in April 2002. BSD
November 22, 2006 BSD
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