Post by mance in How I Built This Thing (Part 3) - Tools comments

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"Efficient code on this CPU requires manual register allocation" ..

"Hand-optimized assembly can be up to 10× faster than compiler output — at a significant cost in development time."

I see you have expert knowledge of Z80. Question: would it be possible today to speed up, for example, R-type or Chase HQ by a significant percentage?

jtpl21 days ago

Their authors shall have better judgement than I do here. ;)

By looking at Chase HQ under debugger I don't think it would be easy. It seems to be highly optimized in most important parts. Minor improvements are for sure possible (they always are), but significant - I doubt it.

mance20 days ago

thanks .. And the original authors, I assume, are all over 65 years old and senility is starting to set in, heh.

itch.io

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