Int 15/AX=53B0h/BH=13h

Intel System Management Bus - REQUEST DATA AND STATUS

AX = 53B0h
BH = 13h
BL = protocol (see #00487)
CH = device address
CL = device command

Return:
CF clear if successful
AH = 00h (SMBus OK)
CH = status
00h no data pending, transaction complete
01h no data pending, transaction continues
02h data pending
CL = number of valid bytes in DX (0-2)
DH = MSB data
DL = LSB data
CF set if error
AH = error code (05h,10h,11h,13h,15h,16h,18h,1Bh,86h) (see #00484)

Desc: Determine when a transaction is complete, gather data returned by read transactions

Note: For Block Read protocol (08h), first call returns block length in DH and the first byte of the block in DL

Category: Expansion Bus Bios - Int 15h - I

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