Contec PC-686CPCI-LV, User Manual

Page: 65 / 118

CHAPTER 5 – Software Utilities
PC-686 (CPCI)-LV User’s Manual 57
5.6.4. W83781D Registers
There are two ports to read W83781D Hardware Monitor Registers.
These two ports are described as following.
Index Register : 295h
Data Register : 296h
The registers Index is showed as next page.
<Sample Program: Read Chip ID Register to bx>
mov ax, 4eh;
mov dx,295h;
out dx,ax;
(index register set for BANK select register)
inc dx;
out dx,80h;
(BANK=0 is set)
mov ax,58h;
mov dx,295h;
out dx,ax;
(index register set for Chip ID register)
inc dx;
in bx,dx;
(Read chip ID register to bx)
Hard Ware Monitor Register Index
Address Auto-Increment Address Description
20h 60h Vcore reading
21h 61h Vtt reading
22h 62h +3.3V reading
23h 63h +5V Reading
24h 64h +12V Reading
25h 65h -12V Reading
26h 66h -5V Reading
27h 67h Sensor Temperature reading
28h 68h CN18 FAN sensor reading
29h 69h Reserved
2Ah 6Ah Reserved
2Bh-3Dh 6Bh-7Dh Limit Registers (*1)
3Eh-3Fh 7Eh-7Fh Reserved
40h-46h - Configuration registers (*1)
47h-49h - VID/Fan Register
48h-4Dh, 4Fh - Configuration registers (*1)
4Eh - 50h-5Fh Bank Select register
BANK0
50h - R-T Table index port (*1)
51h - R-T Table data port (*1)
52h-55h - Winbond Test register
56h-57h - Beep Control registers (*1)