2 ms·
The figure I found suggested that a 486 averages ~0.8 instructions per clock running full-tilt. That seems impossible unless one hardly ever hits memory. I'm
by hapless 16y ago
The figure I found suggested that a 486 averages ~0.8 instructions per clock running full-tilt. That seems impossible unless one hardly ever hits memory.
I'm not 100% certain, but I think the pipelining would allow you to execute (some) register-only instructions in the x86 equivalent of a delay slot.
- shasta 16y agoAccording to the specs, the original 80486 could read or write 16 bits per clock. That's probably on a DX - on a DX2 it's probably 2 clocks. And that's with in order execution - the bus was running at the same frequency as the CPU.