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We ran a Unix-like OS on our home-built CPU with a home-built C compiler (2020)

(fuel.edby.coffee)
305 points AlexeyBrin | 1 comments | 28 Jun 25 12:20 UTC | HN request time: 0s | source
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Tepix ◴[28 Jun 25 14:11 UTC] No.44404824[source]▶
Very impressive! Low end work is often tedious and time consuming, especially if you lack the essentials like a debugger.
replies(1): >>44405375 #
73kl4453dz ◴[28 Jun 25 15:27 UTC] No.44405375[source]▶
Until you've used an oscilloscopes to debug your buggy kprintf, you haven't lived.
replies(2): >>44405782 #>>44408370 #
userbinator ◴[28 Jun 25 21:37 UTC] No.44408370[source]▶
First thing to do is get a working UART.
replies(1): >>44408513 #
1. _sbrk ◴[28 Jun 25 21:59 UTC] No.44408513[source]▶
First thing to do is get a GPIO pin or two to toggle. Plenty of debug patterns that one can blink out.