Re: Q:Inside a IIC

[Rubywand <rubywand@swbell.net>]

Jan writes ...
> 
> Does anyone have a schematic of an IIC?
> How about a list of all the different chips and their meaning, like GLU,
> SPI, MMU? I�m trying tho trace the problem why 3 of my IIC�s don�t work.
> All have similar problems, strange characters on screen and no boot from
> disk, disk will spin and try to read. Speed of the disk is ok. Someone
> suggested the upper memory had a bad chip, but replaced those too with
> no luck.
 ....

     Your question (along with the two from Angelo) 'did it'. I just ordered
the //c Technical Reference from Amazon. So now, if someone talks about an
"SPI" chip, I'll at least know that it's not the Special Purple Interface.

     For now, a guess relating to the kind of slightly flakey behavior you
mention is a power supply problem-- like one of your negative voltages (-5V or
-12V) is messed up. If there are any voltage test points you can identify on
the motherboard, you could check voltages between the test points and ground.



Rubywand