How yo check if Serial Port ( COM 1) working

[bronano]

How to check if Serial Port ( COM 1) is working properly.
In Device manager there is no yellow sign – all seems O.K.
Check Device properties for COM 1 – no conflicts , device is working properly.
I’ve noticed problem when connecting card reader - card is not recognized.
Please advice me if exist any simple way to check Serial Port COM1 functionality.

 

[bronano]

Used a VOM to test the voltage on the Tx signal,no voltage.
I 'll repeat search for Ports settings in BIOS again, but do not believe to found it.
Soon I'll do a test with old mouse , to define finally if this is hardware problem.

 

[bronano]

Settings in BIOS for On-board Serial Port 1 and 2 are on "AUTO".
Shall I change it , or this is O.K.

 

[edfair]

If there is no voltage on TX, the line drive is dead, done, gone. Double check by measuring on 2. Null cables switch wires. If perhaps we got mixed up in what you are using it may be that you don't have a null cable. On a 25 cable 2 is Tx. On a 9 cable 3 is Tx. A null cable on 9 pin port leads to Tx on 2 at the end of the cable.

It is designed for -12 or +12 independent of any setting of the UART.

The serial mouse is a good idea. Thought maybe it had been suggested before. XP sets mine up at 9600.

Ed Fair
Give the wrong symptoms, get the wrong solutions.

 

[bronano]

@edfair ,
Hi mate,
Your diagnostic is clear.Please let me know re my settings in BIOS for Serial port 1 and 2- are they O.K. or not ?

 

[BadBigBen]

The setting AUTO should be OK, if there is an option for ENABLE, then use it instead (DISABLE turns them OFF)...



Ben
"If it works don't fix it! If it doesn't use a sledgehammer..."
How to ask a question, when posting them to a professional forum.
Only ask questions with yes/no answers if you want "yes" or "no"

 

[bronano]

Probably Serial ports are gone.
No changes after BIOS modification

 

[edfair]

Time to cripple the on-board serial ports and get a dual serial card. Assume that it has ISA I/O ports. Or failing that, a ATIO card and cripple the unneeded stuff.

Ed Fair
Give the wrong symptoms, get the wrong solutions.