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<Sarayan>
kc8apf: cool. That fpga is in the dreamcast, I'm not than a little curious what it does (bios checksumming I think)
<Sarayan>
s/not/more/
<jevinskie[m]>
https://mobile.twitter.com/Mathieulh is interested in the Dreamcast bios hash/checksum. He mentioned it when we started looking at the PSP dev kit cyclone I part
<Sarayan>
interesting
<jevinskie[m]>
I think he has been discussing it with someone who mods the bios. I guess they just have to brute force the check by changing some unused bytes but it’s just luck
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<mathieulh>
Hi
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<Mathieulh2>
So you were talking of Holly's checksum?
<Mathieulh2>
I guess I missed the convo :/
<Lofty>
Mathieulh2: luckily we have a backlog in the topic
<Lofty>
This channel is fairly slow, due to there only being a handful of active participants
<Mathieulh2>
Oh! Nice! Let me check this
<Mathieulh2>
hum..
<Mathieulh2>
nothing before this:
<Mathieulh2>
07:22 <Sarayan> kc8apf: cool. That fpga is in the dreamcast, I'm not than a little curious what it does (bios checksumming I think)
<Mathieulh2>
the checksum is weak on the DC, it is performed directly by holly, presumably by some custom module in die
<Mathieulh2>
that said we don't know the algo
<Mathieulh2>
but we know plenty of collisions occur on sheer luck
<Mathieulh2>
Holly is the codename for the PowerVR GPU btw
<Mathieulh2>
in case you were wondering
<Mathieulh2>
if checksum doesn't pass, it will not let anything access the G1 BUS
<Mathieulh2>
which is what the GD-ROM device is connectedto