Hello. I'm a write litell programm.
For find all SMBus device. But not work. :'-(
I test on chipset PIIX4.
When i try detect device 69h (1101 001). SMBus is destroy, BUS is BUSY.
I try brack transfer to set KILL bit. But effect just up ^.
After when i try detect device 69h or Set Kill bit.
If I try detect others device in Host Status Register sets bits BUS_ERR(collision) and DEV_ERR, Host Status Register =18h

Only power off/on can restore work.
On ICH5 work correctly.

Anybody can help me?
PS. I dont test at othe chipsets. SIS not support.
PPS. Run in DOS or Win9x. VMWare, and othe not emulate SMBus

Hello
Note that your code is not good (buggy) and the address 69h usually
is the clock synthesizer (D2H = 69h shl 1) that is , it control the clock
of CPU ,PCI ,FSB , Memory SDRAM and so on, usually used for overclocking,
IF you need i have written in this days an example of SMBus interface