[LinuxBIOS] USB Host to Host Debug Dongle/Cable
dpd at alphalink.com.au
Sat Jul 22 01:28:10 CEST 2006
There are a couple of other "ports" on a PC that could be used for
initial debugging. I have used a spare IDE channel as a general 8 bit IO
port. In fact you can address up to 8 different ports per channel. A
simple outb(b, 0x170) gets reflected on the port. This is dead easy to
interface with. Connect a logic analyser or a small circuit and then
just write to the port. Does not help if the IDE sits out on the PCI bus
Another thought would be to tap the SMBus signals. These are routed to
all memory DIMMS. With some careful soldering you can tap the signals
off the DIMM to a logic analyser. The code can then just write to an
unised i2c address.
Ronald G Minnich wrote:
> Bari Ari wrote:
>> SemiconductorStore.com has several of the the USB debug cables currently
>> in stock for $80:
>> They say that PLX is still processing orders for them as well.
> yes, but ... depending on obsolete hardware for future debug strategy is
> not a good plan.
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