🚀 go-pugleaf

In article <1992Aug20.131829.5606@tc.cornell.edu> homer@theory.TC.Cornell.EDU (Homer Smith) writes:
>      
>     From a beginner...
> 
>     I wrote a short program in assembler to write to every pixel on
>     On my 386/33 with Trident 8900 chip the program takes 1:10
>minutes.
> 
>     On my 486/33 with identical video board the program takes 11:46
>minutes.
> 

First off, both times are too slow.

>     Could someone please give me a hint why the 486 is 11 times
>slower than the 386. 
> 
>     Using another program that did a simple INC AX,1 repeatedly,
>the 486 was 2.8 times faster than the 386.
> 
>     Homer

How are you drawing pixels?  What video mode? If you are calling an INT 10h 
function, there's your bottleneck.  As for why it might be slower, check 
these things:

1>  Do you have VIDEO / BIOS shadow on either machine?

2>  Do you have any non-standard bus timings on either machine?  (Extended
    setup)

3>  Compare the loaded drivers, etc... on both machines, especially packet 
    drivers, keyboard intercepts, video intercepts, etc...

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