Re: R: Interfacing SJA1000 to ISA bus

On 2003-12-03, Massimo Dazzan <[EMAIL PROTECTED]> wrote:

>> But are address/data multiplexed?
>
> Yes, SJA1000 multiplex address and data;

I meant ISA.  IIRC, they aren't.  If you wanted to access the
SJA transparantly (using normal read/write or input/output),
you'd have to design a state-machine that does the address/data
multiplexing and generates the ALE and RD/WR signals.

> I think that is'n possible use ISA ALE signal because i think that this line
> switch on every I/O cycle.Is it correct?

It's not possible to use it directly without some other octal
buffers and some stateful logic.

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