UC知道哪位高手给我帮我解释一下
来源：百度知道 编辑：UC知道 时间：2024/05/26 03:30:46
cseg at 0 ; Absolute code segment at 0000h (i.e.Reset Vector address).
ajmp Start ; 1st instruction (upon reset) is to jump to user program.
cseg at 03h ; EX0/ external interrupt 0
ljmp Int0_ISR
cseg at 0bh ; Timer 0 Interrupt Vector address.
ljmp Timer0_ISR ; Jump to the ISR when Timer 0 interrupts
cseg at 01bh ; TF1 - timer 1 overflow interrupt
ljmp Timer1Int ; used by serial port baudrate generation
cseg at 23h ; RI - serial port interrupt
ljmp SerialInt
这里的cseg at ** 表示什么意思？？需要自己算出来这个的值吗？？
ajmp Start ; 1st instruction (upon reset) is to jump to user program.
cseg at 03h ; EX0/ external interrupt 0
ljmp Int0_ISR
cseg at 0bh ; Timer 0 Interrupt Vector address.
ljmp Timer0_ISR ; Jump to the ISR when Timer 0 interrupts
cseg at 01bh ; TF1 - timer 1 overflow interrupt
ljmp Timer1Int ; used by serial port baudrate generation
cseg at 23h ; RI - serial port interrupt
ljmp SerialInt
这里的cseg at ** 表示什么意思？？需要自己算出来这个的值吗？？
是指从何处开始存放程序的意思。
cseg at 0 ; Absolute code segment at 0000h (i.e.Reset Vector address).
ajmp Start ; 1st instruction (upon reset) is to jump to user program.
这两行，即将程序ajmp Start的代码存放在0000h开始的存储空间。
其他行，可以以此类推。
cseg at 后面的数字，是单片机所特有的数值，必须背下来。
基本的MCS-51单片机，共有六个地址，它们是：
0h、03h、0bh、 13h、 1bh、 23h。