Category: DOS extenders
Flags: available only in protected mode

INT 31 - DPMI 0.9+ - GET PAGE SIZE

	AX = 0604h
Return: CF clear if successful
	    BX:CX = page size in bytes
	CF set on error
	    AX = error code (DPMI 1.0+) (see also #03143)
		8001h unsupported, 16-bit host
BUG:	the Borland C++ 3.1 DPMILOAD returns with CF clear but BX and CX
	  unchanged