INT 1A - PCI 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. v2.0c+ - INSTALLATION CHECK
	AX = B101h
	EDI = 00000000h
Return: AH = 00h if installed
	    CF clear
	    EDX = 20494350h (' ICP')
	    EDI = physical address of protected-mode entry point (see #00731)
	    AL = PCI hardware characteristics (see #00730)
	    BH = PCI interface level major version (BCD(Binary Coded Decimal) A method of data storage where two decimal digits are stored in each byte, one in the upper four bits and the other in the lower four bits.  Since only the values 0 through 9 are used in each half of a byte, BCD values can be read as decimal numbers on a hexadecimal display of memory or a file.)
	    BL = PCI interface level minor version (BCD(Binary Coded Decimal) A method of data storage where two decimal digits are stored in each byte, one in the upper four bits and the other in the lower four bits.  Since only the values 0 through 9 are used in each half of a byte, BCD values can be read as decimal numbers on a hexadecimal display of memory or a file.)
	    CL = number of last PCI bus in system
	EAX, EBX, ECX, and EDX may be modified
	all other flags (except IF) may be modified
Notes:	this function may require up to 1024 byte of stack; it will not enable
	  interrupts if they were disabled before making the call
	some BIOSes do not change EDI, so applications looking for the
	  protected-mode entry point should set EDI to 00000000h before
	  calling this function
SeeAlso: AX=B181h


(Table 00729)
Values for PCI 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. v2.0c+ status codes:
 00h	successful
 81h	unsupported function
 83h	bad vendor ID
 86h	device not found
 87h	bad PCI register number


Bitfields for PCI hardware characteristics:
Bit(s)	Description	(Table 00730)
 0	configuration space access mechanism 1 supported
 1	configuration space access mechanism 2 supported
 2-3	reserved
 4	Special Cycle generation mechanism 1 supported
 5	Special Cycle generation mechanism 2 supported
 6-7	reserved


(Table 00731)
Call protected-mode entry point with:
	registers as for real/V86-mode INT call
	CS = ring 0 descriptor with access to full address space
Return: as for real/V86-mode call