Format of TCPDRV.DOS request block:
Offset Size Description )
00h BYTE (call) function number
00h initialize ???
06h get ???
07h get ???
01h BYTE (call) 00h
(ret) error code if error, unchanged if successful
02h WORD signature 4354h ('CT')
04h DWORD (call) pointer to ??? FAR function
function is called with ES:BX -> device driver request used to
invoke this function
08h 4 BYTEs ???
0Ch DWORD (call) pointer to ??? record, WORD at offset 22h is read
10h DWORD (ret) -> ??? buffer if 0000h:0000h on call
04h 4 BYTEs ???
08h DWORD (ret) pointer to ???
04h DWORD (ret) pointer to ??? record