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mov dx, EXECPROG       ; DS:DX  - ASCIZ program name (preset at PSP[already)
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mov dx, EXECPROG       ; DS:DX  - ASCIZ program name (preset at PSP[already)
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mov bx, EXEC_PARAM_REC ; ES:BX  - parameter block pointer
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mov bx, EXEC_PARAM_REC ; ES:BX  - parameter block pointer
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int 0x21
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int 0x21
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mov [EXECPROG], byte 0 ; make sure to spawn command.com after app exits
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mov [EXECPROG], byte 0 ; make sure to spawn command.com after app exits
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- 
 
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jmp short skipsig      ; enforce valid ds/ss/etc (can be lost after int 21,4b)
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EXEC_COMMAND_COM:
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EXEC_COMMAND_COM:
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; collect the exit code of previous application
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; collect the exit code of previous application
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mov ah, 0x4D
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mov ah, 0x4D
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int 0x21
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int 0x21