[ts-7000] TS-7800 COM2 not working under normal shell prompt

["karlcchen" <>]

I have a TS-7800 with metal enclosure with COM1/COM2/COM3 marked at 
rear of the box.  I supposed that COM1 is /dev/ttyS0 and COM2 
is /dev/ttyS1 and so on.

I have a C program that read/write to /dev/ttyS1 that works in PC 
running linux.  But the program only worked under quick boot prompt 
(busybox).  But after `exit' quick boot, it is not working under normal 
Linux shell prompt.

Is there a device driver I need to load when booting normal linux?  I 
assume the COM3 is /dev/ttyS3 too?

Karl




 
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