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求教:VxD中向COM4:输出无响应
我想在VxD中操作COM4:口,先作了如下实验:
BOOL WrcomDevice::OnSysDynamicDeviceInit() { asm{ PUSH EDX PUSH EAX MOV DX,2e8H MOV AL,'A' out DX,AL in AL,DX MOV AL,'T' out DX,AL in AL,DX MOV AL,'D' out DX,AL in AL,DX MOV AL,'3' out DX,AL in AL,DX MOV AL,'5' out DX,AL in AL,DX MOV AL,'0' out DX,AL in AL,DX MOV AL,'2' out DX,AL in AL,DX MOV AL,'4' out DX,AL in AL,DX MOV AL,'5' out DX,AL in AL,DX MOV AL,'1' out DX,AL in AL,DX MOV AL,0Dh out DX,AL in AL,DX POP EAX POP EDX } return TRUE; } 希望在VxD装入时拨电话3502451,结果没有响应,但如下的dos程序却可以拨通3502451: ORG 100H code segment start proc far ASSUME CS:CODE MOV DX,2E8H MOV AL,'A' out DX,AL MOV AL,'T' out DX,AL MOV AL,'D' out DX,AL MOV AL,'3' out DX,AL MOV AL,'5' out DX,AL MOV AL,'0' out DX,AL MOV AL,'2' out DX,AL MOV AL,'4' out DX,AL MOV AL,'5' out DX,AL MOV AL,'1' out DX,AL MOV AL,0Dh out DX,AL INT 20H CODE ENDS END START 不知VxD中问题出在哪里?请指教。 |
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沙发#
发布于:2002-06-14 16:17
晷注!
那你在操作com3端口 |
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