RS232 的相关操作。我现在想对serial port 进行操作，但是发现仅仅用inb 和outb是不可以的，google 了一下，好像好要对serial port 进行相关设置，但是查到的内容不是很多：
02E8-02EF ---- serial port, same as 02F8, 03E8 and 03F8
------------------------------------------------------------------------------- 02E8-02EF ---- 8514/A and compatible video cards (e.g. ATI Graphics Ultra)
02E8 r display status 02E8 w horizontal total 02EA w DAC mask 02EB w DAC read index 02EC w DAC write index 02ED w DAC data
------------------------------------------------------------------------------- 02EA ---- S3 86C928 video controller (ELSA Winner 1000)
------------------------------------------------------------------------------- 02F8-02FF ---- serial port, same as 02E8, 03E8 and 03F8
02F8 w transmitter holding register 02F8 r receiver buffer register r/w divisor latch, low byte when DLAB=1 02F9 r/w divisor latch, high byte when DLAB=1 r/w interrupt enable register when DLAB=0 02FA r interrupt identification register 02FB r/w line control register 02FC r/w modem control register 02FD r line status register 02FF r/w scratch register
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用户122571 2008-4-16 13:21