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AX = B10Ah subfn 100Bh BH = bus number BL = device/function number (bits 7-3 device, bits 2-0 function) DI = register number (0000h-00FFh) (see #00878)
Return:
CF clear if successful ECX = dword read CF set on error AH = status (00h,87h) (see #00729) 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. The meanings of BL and BH on entry were exchanged between the initial drafts of the specification and final implementation
See Also: AX=B10Ah - AX=B10Ah/SF=8086h
Format of National Semiconductor PC87410 EIDE Controller configuration: Offset Size Description (Table 00921) 00h 64 BYTEs header (see #00878) (vendor ID 100Bh, device ID D001h)
10h DWORD I/O base address for channel 0 control ports (def:
01F0h)14h DWORD I/O base address for channel 0 status port (def:
03F6h)18h DWORD I/O base address for channel 1 control ports (def:
0170h)1Ch DWORD I/O base address for channel 1 status port (def:
0376h) 40h BYTE IDE Channel 0 timing control 41h WORD IDE Channel 0 read-ahead counter (write-only except bit 15) 43h BYTE IDE Channel 0 function 44h BYTE IDE Channel 1 timing control 45h WORD IDE Channel 1 read-ahead counter (write-only except bit 15) 47h BYTE IDE Channel 1 function 48h BYTE PCI control 49h 7 BYTEs unused 50h 176 BYTEs ??? (unused?) !!!http://www.national.com/ds/PC/PC87410.pdf p.7
See Also: #00739 - #00922
Format of National Semiconductor PC87415 IDE DMA-Master configuration: Offset Size Description (Table 00922) 00h 64 BYTEs header (see #00878) (vendor ID 100Bh, device ID 0002h) 40h 3 BYTEs control register 43h BYTE write buffer status (read-only) 44h BYTE Channel 1 master read timing 45h BYTE Channel 1 master write timing 48h BYTE Channel 1 slave read timing 49h BYTE Channel 1 slave write timing 4Ch BYTE Channel 2 master read timing 4Dh BYTE Channel 2 master write timing 50h BYTE Channel 2 slave read timing 51h BYTE Channel 2 slave write timing 54h BYTE command and control block timing 55h BYTE sector size !!!http://www.national.com/ds/PC/PC87415.pdf p.8
See Also: #00739 - #00921
Category: Expansion Bus Bios - Int 1Ah - P
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