INT 78 - UofSalford DBOS DOS extender - API(Application Program[ming] Interface) The defined set of calls which a program may make to interact with or request services of the operating system or environment under which it is running.  Because the inputs and outputs of the calls are well-defined, a program using the API can continue using the identical calls even if the internal organization of the program providing the API changes.
	AH = function
	    00h (PB) display 32-bit memory specified by command argument
	    01h (PT) display 32-bit instruction(s) specified by command arg
	    02h specify offset to subsequent PB and PT commands
	    03h switch to protected mode
		DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address. following INT instruction point to map; protected-mode
			  entry point is immediately following the DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.
		Return: never
		Note:	if bit 31 of the map address is set, only a stub was
			  loaded by DOS and DBOS will load the entire program
	    04h specify that subsequent load (AH=03h) should leave program in
		  memory
	    05h release program from memory
	    06h set break point at address and option count from commandline
	    07h resume program execution
	    08h single-step program
	    09h set read/write breakpoint using 386 debug registers
	    0Ah set write breakpoint using 386 debug register
	    0Bh set memory byte to new value
	    0Ch display CPU(Central Processing Unit) The microprocessor which executes programs on your computer. registers
	    0Dh run until specified program address reached
	    0Fh print trace from program map
	    10h specify an offset using a map symbol
	    14h print memory without any offset
	    18h switch DBOS into/out of test mode (ON/OFF commandline args)
	    1Dh get address of real/protected-mode communication buffer
		Return: ES:BP -> comm buffer
	    1Eh set real-mode memory size (specify how much real-mode memory
		  to leave free when running FTN77 programs)
	    22h uninstall DBOS
	    24h force DBOS to emulate coprocessor instructions
	    26h set named DBOS switches from commandline
	    27h reset named DBOS switched from commandline
	    2Ah set list of dynamic link libraries to contents of commandline
		  file
	    35h specify that subsequent load (AH=03h) should stop at first
		  instruction
Return: ???
Notes:	DBOS supports functions 00h through 50h; many of these functions
	  provide a low-level debugging interface
	command arguments are read from the calling program's PSPsee Program Segment Prefix
SeeAlso: INT 79"DBOS"
Index:	uninstall;DBOS DOS extender
                                                                                

INT 78 - DJGPP GO32.EXE DOS EXTENDER - RELOCATED IRQ0                           
Program: GO32.EXE is a DOS extender included as part of the 80386 port of the
	  GNU C/C++ compiler by DJ Delorie and distributed as DJGPP
Notes:	this vector is overwritten when GO32 starts but is not restored by
	  early versions of the extender
	the newest versions of GO32 dynamically allocate the vectors used
	  for the relocated IRQs, much as DESQview does (see INT 50"DESQview")
SeeAlso: INT 08,INT 10/AH=FFh"GO32",INT 79"GO32"