🚀 go-pugleaf

In article <1991Jan7.165104.25541@santra.uucp> c37189h@saha.hut.fi (Harri "Haba" Suomalainen) writes:
>sverrehu@ifi.uio.no (Sverre H Huseby) writes:
>>I have tried clearing the EGA graphics screen (mode 10h)
                   ((16 and 32-bit code expunged))       
>>The 386-routine takes almost the same amount of time as
>>does the 8086-routine.
>
>If it were 32 bit memory 386 would be a lot faster. However, I doubt
>you haveing a 32 bit EGA. Instead your EGA is 8 or 16 bit. As accessing
>memory on EGA board is the speed limiting factor there shouldn't be big
>differences in speed if both EGAs are the same type. (Of cource, higher 
>clock speed with 386 speeds up things unless you gotta use waitstates 
>for the EGA).
>
     This is generally the case with 386 machines, aws they are often
built on an AT bus.  The 8- and 16-bit slots are on an 8 MHz bus,
regardless of processor speed, while the 32-bit RAM is on a faster bus
to yield zero wait-states for the RAM.  So it is likely that your EGA
card is on a two-wait-state bus, and the only difference in execution
speed is in the processor handling instructions in extended registers.

 
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