原创 Fedora Core 5.0 - more than 4 serial ports ★★★★

 

Hello All,

I have installed the Fedora Core 5.0 on my x86 SBC. I have 6 COM ports on my board. The kernel sets up the first 4 without any issues. When I try setting up the last 2, I get errors. I checked my .config file to verify I had support built in for more than 4 COM ports, this is true, I have up to 32 if I am reading it correctly. I had to create ttyS4 and ttyS5 using MAKEDEV in the /dev directoy because they did not previously exist. Then I used the setserial command as follows:
setserial /dev/ttyS4 uart 16550a port 0x1a8 irq 9 ^fourport

I did this for both ttyS4 and ttyS5, with different addresses of course.
Both commands completed without errors. However, when I run the following command:
setserial -a /dev/ttyS4
I get the following error:
/dev/ttyS4: No such device or address

I did a google search for the error, but I have not been able to find anything that has helped. I also did a search for serial ports in this forum and did not see anything similar. If anyone has any suggestions, I would hugely appreciate any and all help. Thank you.

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