INT 14 - PhysTechSoft PTS ROM-DOS - SET PACKET                                  
	AH = 05h
	CX = packet length
	DX = port number
	DS:SI -> packet
Return: AH = error code (0 = no error, -1 = error)
Notes:	The embedded PCIBM PC can send messages at any time. The managing PCIBM PC may
	  force the embedded PCIBM PC to receive messages only after causing a reset
	  on the remote embedded PCIBM PC.
    !!!from Matthias Paul:
    Description of the high-level control packets:
	After the reset the embedded PCIBM PC will send a 4-byte packet "LOAD"
	  to the managing PCIBM PC to indicate it is now able to receive commands.
	The managing PCIBM PC can send commands using 6-byte sized packets starting
	  with "COMM" followed by a 2-byte command code:
	    "01" demand setup information
	    "02" demand sending of diagnostic information
	If diagnostic information is requested, the embedded PCIBM PC will send back
	  a header packet starting with 4-byte "DIAG" followed by 2 bytes
	  indicating the count of diagnostic data packets following. Each
	  diagnostic data packet is sized 134 bytes, starting with the 4-byte
	  "DIAG", a 2-byte number packet, followed by 128 bytes of data.
	If setup information is requested, the embedded PCIBM PC will send back
	  8 bytes length packets starting with "SETP" and 2 byte of setup
	  information of the LOADER and BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware.  The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly.. The contents varies.
	If the embedded PCIBM PC requests the managing PCIBM PC to send a BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware.  The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. it will
	  send a 4 byte packet "BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware.  The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly.".
	The managing PCIBM PC will then send back a 6-byte sized BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware.  The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. header packet
	  starting with "BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware.  The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly." and a 2-byte indicator of the BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware.  The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. image size
	  in packets.
	The embedded PCIBM PC will answer by sending a 6 byte packet starting with
	  "BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware.  The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly." followed by the running number of the demanded packet.
	The managing PCIBM PC will then send the requested part of the BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware.  The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. image
	  in a 134 byte sized packet, starting with "BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware.  The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly.", the 2 byte running
	  number of the packet and 128 bytes of the actual BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware.  The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. info.
	The embedded PCIBM PC acknowledges that it received the BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware.  The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. with a 6-byte
	  packet "BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware.  The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly.", followed by 2-bytes of 0.
	If the embedded PCs requests the managing PCIBM PC to send the operating
	  system, it will follow the same proceduce as for requesting the
	  BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware.  The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly.. The only difference is that instead of "BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware.  The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly.", the string
	  "PTOS" will be used in the communication.
	Debug information packets have a length of 32 bytes starting with
	  the 4-byte "DEBU" signature, and followed by the contents of the
	  PCU registers in the following order: SP, SS, ES, DS, BP, DI, SI,
	  DX, CX, BX, AX, IP(Internet Protocol) The lower level (transport layer) of the TCP/IP protocol suite.	See also TCP, TCP/IP., CS, Flags. Debug information is send after
	  reaching the corresponding breakpoint.
     Description of the low-level packet protocol:
	Before sending a packet the sending side sends a byte 52h and for a
	  certain time (ca. 1 second for the embedded PCIBM PC) waits for
	  confirmation (41h) from the receiving side. If no acknowledge is
	  received this	procedure is repeated 4 more times before an error is
	  returned.
	If acknowledge was received the following information is sent:
	 2 BYTEs  synchronization (50h, 50h)
	   BYTE	  data packet size - 1
	 2 BYTEs  CRC of the data
	 var.	  data
	 2 BYTEs  synchronization (F0h, F0h)
	The receiving side must acknowledge this by sending back two bytes
	  59h, 59h. If the sender does not receive the confirmation, it
	  tries 4 more times before returning an error.
SeeAlso: INT 14h/AH=06h, INT 15h/AX=E908h, INT 15h/E909h