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   Andrew Zonenberg (azonenberg@ioc.exchange)'s status on Thursday, 05-Dec-2024 01:23:23 JST Andrew Zonenberg

   • Matthew Garrett
   • Rich Felker

   @ireneista @dalias @mjg59 Yeah.

   I'm *close*. I've done semiconductor deprocessing (which uses a lot of etch techniques from fab), gate level reverse engineering so I have a decent understanding of standard cell logic and memory arrays.

   I've done DIY lithography down to ~10um feature size, lots of FPGA gateware, and consulted on a 28nm ASIC project in which I did all of the HDL development for the chip but another guy did the physical layout and it was fabbed by TSMC, and yet another team member did the complex multi-die BGA package design.

   And the standard cell library, SRAM compilers, PLL, and SERDES were third party IPs that I just used as black boxes.

   So going from that to "I've written a bare metal TCP/IP stack, SSH server, and for a different project a basic RTOS" means I have a significant fraction of the stack covered at "made a smol one" level.

   But that's still soooo far from all of the things you'd need to build a modern CPU and OS and JS engine from scratch even if you had all of the tools.

   • Embed this notice
     Andrew Zonenberg (azonenberg@ioc.exchange)'s status on Thursday, 05-Dec-2024 01:23:22 JST Andrew Zonenberg

     in reply to

     • Matthew Garrett
     • Rich Felker

     @ireneista @dalias @mjg59 Hell I even made a 10/100 Ethernet PHY from an FPGA and a dozen resistors years back (and got a POC||GTFO article out of it) just to prove a point.

     But 1000baseT for example is a completely different animal.

   • Embed this notice
     Rich Felker (dalias@hachyderm.io)'s status on Thursday, 05-Dec-2024 01:23:22 JST Rich Felker

     in reply to

     • Matthew Garrett

     @azonenberg @ireneista @mjg59 Call me old fashioned but I consider 1000 and even 100 unnecessary/overkill. 10 Mbit is fine for pretty much anything reasonable.

   • Embed this notice
     Andrew Zonenberg (azonenberg@ioc.exchange)'s status on Thursday, 05-Dec-2024 01:28:55 JST Andrew Zonenberg

     in reply to

     • Matthew Garrett
     • Rich Felker

     @dalias @ireneista @mjg59 10baseT is extremely straightforward from an electrical perspective, to the point that given some time I could decode and synthesize waveforms with a pencil and paper.

     100baseTX is complex enough you really wouldn't want to do it by hand, but still well within the point of where you can learn the basics of in a few hours.

     As far as "anything reasonable" as someone doing test and measurement equipment design I'd somewhat disagree... in metrology work you can easily saturate tens of Gbps with digitized analog data.

     Haelwenn /элвэн/ :triskell: likes this.