In al 3f8h
WebThe byte read is written to AL. If AX is specified as the destination, then a word is read from the port. In this case, the port only gives us a byte to read (i.e. I/O port address 3F8H or 2F8H contains 1 byte read from the serial port receive buffer). … WebChange Settings [IO=3F8h; IRQ=4] 84 Power On By PCIE/PCI [Disabled] Power On By Ring [Disabled] Power On By RTC [Disabled] 3.5.8Network Stack; Network Stack [Disable Link] 85 CPU Temperature / MB Temperature [xxxºC/xxxºF] N/A; Ignore; 86 CPU Fan Profile [Standard] 87 Chassis Fan Profile [Standard]
In al 3f8h
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WebFor the standard PC ports, the UART registers are based at 3F8h (COM1), 2F8h (COM2), 3E8h (COM3), and 2E8h (COM4). COM1 and COM3 share interrupt request line IRQ4 while COM2 and COM4 share request line IRQ3. This means that COM1 and COM3 can't be used concurrently and is similarly true for COM2 and COM4. Web18级《微机原理与接口技术》本科复习题_试卷
Web注:在in和out指令中,只能通过ax或al来存放从端口中读入的数据或要发送到端口中的数据,且访问8位端口时,用al,访问16位端口用ax。 对0~255以内的端口进行读写时: in al, 20h; out 20h, al; 对256~65535的端口进行读写时,需要将端口号写 … Webwhat i basically want to do is do a chat thing using serial ports, pretty much like Choink23 is trying to do in another thread. here's the code i've done so far: segment .text global _asm_main _asm_main: enter 0,0 pusha mov dx, 0 ;send 'a' through com1 mov al, 'a' mov ah, 1 int 14h mov ah,3 ;check serial port status int 14h ;to check if data is ...
WebJul 25, 2024 · in al, 20h ; 向20h端口读入一个字节 out 20h, al ; 向20h端口写入一个字节; 256 ~ 65535. mov dx, 3f8h in al, dx out dx, al; shl shr. shl 逻辑左移指令. 将一个寄存器或内存单元中的数据向左移; 将最后移出的一位写入CF中; 最低位用0补充; mov al, 01001000b shl al, 1 ; al = 10010000b, cf = 0; shr ... WebUse the Embedded Serial Port option to assign a logical COM port address and associated default resources to a selected physical serial port. Prerequisite. For proper screen resolution, set the console resolution in the terminal software to 100x31.
WebJun 15, 2009 · Onboard Serial Port: This setting allocates an address and IRQ for your motherboard's serial port. Unless you're experiencing any IRQ conflicts, you should leave this setting on Auto (if it's an...
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