On Mon, 11 Feb 2002, Julius Sridhar wrote:
> Ok, this is the way it works: there is a bus clock rate, and a bus width.
> The bus will slow its clock rate to the clock of the slowest device, but
> narrow (8-bit) and wide (16-bit) devices can coexist on a wide (16-bit)
> bus. Suppose that you have two devices that run at 20MHz (ultra speed).
> Even if one is ultra wide (20MHz, 16-bit) and one is plain-old ultra
> (20MHz, 8-bit), the bus will be 16-bits wide. You just have to make sure
> the narrow device's ID is in the lower three bits of the address space
> (0-7). The wide devices can be addressed anywhere in the 4-bits of the
> address space (0-f).
Thanks. That clears things up.
Sellam Ismail Vintage Computer Festival
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Received on Mon Feb 11 2002 - 10:22:15 GMT