、用 DEBUG的基本命令，单步执行P113例4-3的程序，检查每条指令执行后目的地址及有关寄存器的内容。



２、用DEBUG的A命令，键入如下程序段：

MOV BX，8275H

MOV AX，3412H　　；双精度数34128275H——AX、BX

ADD BX，92A5H

ADC AX，2F65H ；加上双精度数2F6592A5H

ADD BX，0EAE6H

ADC AX，9C88H ；加上双精度数9C88EAE6H

然后用T命令单步执行，查看每条指令执行后有关寄存器的内容及标志位的变化。

注意：①用A命令时键入的数均为十六进制，故其后的“H”不要键入．

②用T命令不适合执行“INT”指令。



３、学会使用DEBUG中的命令：D、G、E、R、T、A、U，为后面调试运行汇编源程序打下基础。-The basic commands of the DEBUG, the single-step procedures of P113 cases 4-3, check the destination address and the contents of the register after each instruction execution. DEBUG A command, type the following program segment: MOV BX, 8275H MOV AX, 3412H　double precision number 34128275H- AX, the BX the ADD the BX 92A5H the ADC AX, 2F65H　coupled with double-precision number 2F6592A5H ADD the BX 0EAE6H ADC AX, 9C88H　coupled with double-precision number 9C88EAE6H then use the T command steps to view the register content and the change of flag in each instruction is executed. Note: ① the A command, type the number are in hexadecimal, so the subsequent " H"　Do not type. ② T command is not suitable for the implementation of the " INT"　command. 3, learn how to use the DEBUG command: D, G, E, R, T, A, U,, for later debugging and lay the foundation for running the assembler source.