Re: [OpenBIOS] ping ?

[Timothy J. Massey]

On Fri, 30 Apr 1999 01:05:25 -0230, James Oakley wrote:
> One thing I have to find out however, is how fast the processor accesses
> the BIOS. I'll have to hook it up to my scope (though I may not learn
> much from that as it's only a 20MHz scope)

I could be wrong but...

Isn't the ISA bus usually limited to 8MHz?  I've seen ISA busses overclocked
as high as 16MHz, but never any higher.  So, a 20MHz scope should show you
how fast the CPU is accessing the BIOS.

Of course, It's been a few years since my Digital Electronics classes...

Tim Massey

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ping ?

[James Oakley]

"Timothy J. Massey" wrote:
> Isn't the ISA bus usually limited to 8MHz?  I've seen ISA busses overclocked
> as high as 16MHz, but never any higher.  So, a 20MHz scope should show you
> how fast the CPU is accessing the BIOS.

You're right. I was wondering how fast the BIOS was accessed, ISA speed
or something closer to memory speed (I think it's ISA speed, but I'll
check anyway). If it's ISA speed, the board will be much simpler as we
can just wire the signals from the ISA bus.

james oakley
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