Comparing an LZ4 Decompressor on Four Legacy CPUs
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Comparing an LZ4 Decompressor on Four Legacy CPUs
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Re: Comparing an LZ4 Decompressor on Four Legacy CPUs
#2This was a tough but fun read. It's my understanding that the three restrictions ensure, by way of overshooting, that there's no need to do any expensive if-tests. Everything can just go full throttle.
Re: Comparing an LZ4 Decompressor on Four Legacy CPUs
#3Bumbershoot is a great blog if you are a 1980s home computer/console enjoyer, but were never quite sure how it all worked. He is trying to figure this out himself, so he goes step-by-step through getting his games working on a particular system.
So there are a lot of ASM 'deep dives' like this entry (which probably won't get too much traction.) My one complaint is he has a lot of content, but the blog is hard to navigate.
Re: Comparing an LZ4 Decompressor on Four Legacy CPUs
#4Algorithms in the LZ family were always popular with self-decompressing executables, because of their simplicity and high efficiency; like a natural extension of RLE, they can achieve very high compression ratios while needing only a few dozen bytes for a decompressor.
Re: Comparing an LZ4 Decompressor on Four Legacy CPUs
#5https://archive.ph/x3wgL if you want to read without finding and clicking the "no, your interest in stalking me is not legitimate" box that is nested in extra clicks for each of the partners (seriously wordpress, if you are happy to be so significantly non-compliant just be honest and don't comply at all).
Re: Comparing an LZ4 Decompressor on Four Legacy CPUs
#6This has great detailed comparisons between implementations on different 8-bit CPUs, a good study of how their differing approaches impact real code (e.g. 6502 vs Z-80) or enhanced versions of others (8080 vs. Z-80 vs. 8086).
Re: Comparing an LZ4 Decompressor on Four Legacy CPUs
#7https://archive.ph/x3wgL if you want to read without finding and clicking the "no, your interest in stalking me is not legitimate" box that is nested in extra clicks for each of the partners (seriously wordpress, if you are happy to be so significantly non-compliant just be honest and don't comply at all).
I block the consent banner. Easiest way to avoid such immoral practices.
Re: Comparing an LZ4 Decompressor on Four Legacy CPUs
#8https://archive.ph/x3wgL if you want to read without finding and clicking the "no, your interest in stalking me is not legitimate" box that is nested in extra clicks for each of the partners (seriously wordpress, if you are happy to be so significantly non-compliant just be honest and don't comply at all).
I block the consent banner. Easiest way to avoid such immoral practices.
I tend to assume that because the “legitimate interest” options are on by default, despite everything else being off if it is, that they are opt-outs rather than op-ins, and therefore blocking the banner just removes my chance to opt out.
I instead just paste wordpress links into archive.* or similar without going in personally at all.