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   ✧✦Catherine✦✧ (whitequark@mastodon.social)'s status on Tuesday, 06-May-2025 03:35:58 JST ✧✦Catherine✦✧

   quiz: from this snippet, would you be able to understand how to program the breakpoint/watchpoint units in tandem?

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     ✧✦Catherine✦✧ (whitequark@mastodon.social)'s status on Tuesday, 06-May-2025 03:39:35 JST ✧✦Catherine✦✧

     in reply to

     in order to single-step on this goddamn core, you have to program the two breakpoint/watchpoint units in tandem

     the second one is used to match on only the address of the current instruction

     and the first one is used to construct a NOT gate appended to the output of the second one

     it took me like 20 minutes to figure out how to implement this, _and i write RTL professionally_

     imagine being a developer with no RTL background or something :)

   • Embed this notice
     Andrew Zonenberg (azonenberg@ioc.exchange)'s status on Tuesday, 06-May-2025 03:43:37 JST Andrew Zonenberg

     in reply to

     @whitequark debug random number generator

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     ✧✦Catherine✦✧ (whitequark@mastodon.social)'s status on Tuesday, 06-May-2025 03:43:51 JST ✧✦Catherine✦✧

     in reply to

     • Andrew Zonenberg

     @azonenberg well it definitely generates numbers

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     ✧✦Catherine✦✧ (whitequark@mastodon.social)'s status on Tuesday, 06-May-2025 04:59:28 JST ✧✦Catherine✦✧

     in reply to

     one more upsetting comment for the upsetting comment pile

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     Andy Wingo (wingo@mastodon.social)'s status on Tuesday, 06-May-2025 05:07:37 JST Andy Wingo

     in reply to

     @whitequark lol. lmao

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     ✧✦Catherine✦✧ (whitequark@mastodon.social)'s status on Tuesday, 06-May-2025 05:08:27 JST ✧✦Catherine✦✧

     in reply to

     • Andy Wingo

     @wingo I designed several CPUs and build debug tooling for CPUs for both software _and_ RTL side and I still somewhat struggled with this!

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     ✧✦Catherine✦✧ (whitequark@mastodon.social)'s status on Tuesday, 06-May-2025 06:54:44 JST ✧✦Catherine✦✧

     in reply to

     another one

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     Ted Mielczarek (tedmielczarek@mastodon.social)'s status on Tuesday, 06-May-2025 07:50:44 JST Ted Mielczarek

     in reply to

     @whitequark the GDB remote protocol is such a mess of undocumented assumptions.

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     TheZoq2 (thezoq2@mastodon.social)'s status on Tuesday, 06-May-2025 15:48:09 JST TheZoq2

     in reply to

     @whitequark Ah yes, verilog concatenation syntax, truly the most universal way to express this

     Also, beautiful formatting, no notes

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     ✧✦Catherine✦✧ (whitequark@mastodon.social)'s status on Tuesday, 06-May-2025 18:00:37 JST ✧✦Catherine✦✧

     in reply to

     • equi

     @equinox there is a { missing, yep

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     equi (equinox@chaos.social)'s status on Tuesday, 06-May-2025 18:00:38 JST equi

     in reply to

     @whitequark is there a { missing on the 3rd line or am I blind?