Int 60  U - Intrspy/cmdspy API                                             [G]

Program: INTRSPY is a script-driven debugger included with the book
     _Undocumented_DOS_.

Notes: INTRSPY will hook the first available interrupt in the range 60h-67h.
   The installation check is to
     a) determine that the handler is an IRET instruction
     b) the signature 0Dh "INTRSPY vN.NN" immediately precedes the handler
     If INTRSPY is installed, the DWORD immediately after the IRET stores
     its entry point.
Index: installation check;INTRSPY

Call INTRSPY entry point with:
   AH = function
       00h ???
       01h set current directory (for use in reporting)
       ES:DI -> counted string containing directory name (max 79 char)
       02h set name of script file
       ES:DI -> counted string containing file name (max 79 chars)
       03h set script arguments
       ES:DI -> counted string containing arguments (max 79 chars)
       04h get directory set with function 01h
       ES:DI -> 80-byte buffer for directory name
       05h get name of script file
       ES:DI -> 80-byte buffer for script filename
       06h get script arguments
       ES:DI -> 80-byte buffer for script arguments
       07h get ???
       CL = 00h-15h specifies what to get
       ES:DI -> WORD to be set with desired value on return
       08h get ???
       ES:DI -> WORD to be set with returned value
       09h get ???
       ES:DI -> WORD to be set with returned value
       0Bh store code for interrupt handler???
       ES:DI -> data
       CX = number of bytes
       0Ch ???
       ES:DI -> ???
       0Dh get ???
       ES:DI -> BYTE to be set with returned value
       0Eh set ??? flag
       0Fh clear ??? flag
       10h ???

       Return: AL = 04h or 05h if failed
       11h ???

       Return: AL = 05h if failed
       12h get ???
       ES:DI -> buffer

       Return: CX = number of bytes returned in buffer
       13h ???

Return: AH = 00h
   AL = status
       00h successful
       01h invalid function
       02h ???
       03h ???
       04h ???
       05h ???