COM2 serial port cannot be used! (Solved) - China DOS Union Forum

I bought a serial port bracket (see attachment). After connecting it to the motherboard's COM2, the printer could not print normally. The printer prints normally on COM1. (Operating system: MSDOS)

Set in BIOS:

OnBoard Seriel Por1: Auto (Aoto/Disablled/3F8h/2F8h/3E8h/3E8h)
OnBoard Seriel Por2: Auto (Aoto/Disablled/3F8h/2F8h/3E8h/3E8h)
Serial Port2 mode: normal (Normal/IrDA/ASK-IR)

Do I need to set something?

I bought another one and it worked, maybe the original one had the wrong bridging!

[ Last edited by lin2006 on 2007-8-20 at 12:06 AM ]

Floor1　lin2006	Posted 2007-08-19 19:45
初级用户　Posts 22　Credits 60
I bought a serial port bracket (see attachment). After connecting it to the motherboard's COM2, the printer could not print normally. The printer prints normally on COM1. (Operating system: MSDOS) Set in BIOS: OnBoard Seriel Por1: Auto (Aoto/Disablled/3F8h/2F8h/3E8h/3E8h) OnBoard Seriel Por2: Auto (Aoto/Disablled/3F8h/2F8h/3E8h/3E8h) Serial Port2 mode: normal (Normal/IrDA/ASK-IR) Do I need to set something? I bought another one and it worked, maybe the original one had the wrong bridging! [ Last edited by lin2006 on 2007-8-20 at 12:06 AM ] Attachments blende_com.jpg (32.2 KiB)