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Int 1A Fn B101 - Intel PCi BIOS V2.0c - Installation Check [X]
AX = B101h
Return: AH = 00h if installed
CF clear
EDX = 20494350h (' ICP')
EDI = physical address of protected-mode entry point (see below)
AL = PCI hardware characteristics
bit 0: configuration space access mechanism 1 supported
bit 1: configuration space access mechanism 2 supported
bits 2-3 reserved
bit 4: Special Cycle generation mechanism 1 supported
bit 5: Special Cycle generation mechanism 2 supported
bits 6-7 reserved
BH = PCI interface level major version (BCD)
BL = PCI interface level minor version (BCD)
CL = number of last PCI bus in system
EAX, EBX, ECX, and EDX may be modified
all other flags (except IF) may be modified
Note: this function may require up to 1024 byte of stack; it will not enable
interrupts if they were disabled before making the call
See Also: AX=B181h
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
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