Format of Compaq AG1024.SYS request packet:
Offset	Size	Description	)
 00h	WORD	function
		0000h get ??? (26h bytes)
		0001h get ??? (36h bytes)
		0002h set ??? (same as returned by function 0001h)
		0003h get ??? (6 bytes)
		0004h get ???
		0005h get ???
		0006h get ??? (10h bytes)
		0007h set ??? (same as returned by function 0006h)
---functions 00h-03h,06h,07h---
 02h	WORD	size of data buffer
 04h	DWORD	-> buffer for function's data
 ---functions 04h,05h---
 02h	WORD	???
 04h	WORD	size of data buffer
 06h	DWORD	-> buffer to receive data