[rescue] A5000 questions...
justaguy at lanset.com
Wed Aug 6 22:15:58 CDT 2003
errrrrrr....... isn't that 64 bits wide (8 bytes)?
> Uhhhhhhhhh, NO. Sbus is usually clocked at 25MHz and it's four
> bytes wide, making it about the equivalent in performance to baseline
> PCI. The faster (33MHz) baseline PCI clock advantage is eaten up by
> the way sbus starts and stops transfers...with sbus, one transfer can
> start on the very next cycle after the last transfer ends, but with
> PCI there are intervening arbitration cycles.
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