so like if you were making a new pcie card how would you write software for it

like does my computer's motherboard have pins that go straight to the pcie slots? or is it more like it has some io slots that go to a memory bus and that memory bus can be addressed to a pcie slot and then the pcie controller sends to the pcie boards and so on

@shoofle It's a bit dated but this illustrates quite well how a motherboard is laid out. The chipset is the one part that always comes with a heatsink (sometimes even a little fan) https://de.wikipedia.org/wiki/Southbridge#/media/Datei:Motherboard_diagram.svg

@shoofle ah, also I think northbridges are usually part of the CPU these days because memory needs to be really fast

@noiob yeah, okay! i'm looking at some of the other things on that wiki page and it seems like the pcie communication is handled at the same level as main memory?

@shoofle I just realized I linked the German article and the English one has a newer (but simpler) diagram

@shoofle I think these days PCI-E is all handled directly by the CPU but I don't know how it actually works electrically, just that it's a really fast connection and the amount of devices you can plug into it is limited by the amount of PCI-E lanes the CPU has

@noiob @shoofle unless one is designing the card, or reverse engineering it, doesn't a lot of this stuff get abstracted in an sdk.

@noiob @shoofle even in this recent this guide, it's like, "look at what the vendor does"

https://betontalpfa.medium.com/oh-no-i-need-to-write-a-pci-driver-2b389720a9d0

@confusedcharlot @noiob oooh this is a good link

@confusedcharlot @noiob can I boost it?

@shoofle @noiob yeah. boost it, repost it, put it on gopher