Re:I spent 5 years writing my own operating system
by halfer53 on Saturday June 26, 2021 @09:24PM
(#27647660)
I agree, X86 is too complex with its legacy hardware and obscure instructions and environments. It might not be a good starting place to develope hobby projects.
The OS is running in a customised RISV hardware in MIPS for educational purposes, you can read more here https://dl.acm.org/doi/pdf/10.1145/1275462.1275470 The simulator https://github.com/halfer53/rexsimulator
The BIOS has already been written for the serial ports, etc. So it is quite easy for me to interact with the devices in the OS.
Re:I spent 5 years writing my own operating system
by akkartik on Saturday June 26, 2021 @09:28PM
(#27647692)
This is really cool, to the extent that I'm surprised I've never heard of it. Are universities still using it in coursework?
Re:I spent 5 years writing my own operating system
by halfer53 on Saturday June 26, 2021 @09:38PM
(#27647745)
Yeah they are still using to teach computer systems and operating system course
Re:I spent 5 years writing my own operating system
by ori_b on Saturday June 26, 2021 @10:39PM
(#27648040)
It's also by far the best documented and most consistent hardware out there, especially when it comes to configurations. Yes, it's grotty -- but at least you can figure out where the gunk is.
Re:I spent 5 years writing my own operating system
by lovelyviking on Saturday June 26, 2021 @10:26PM
(#27647967)
How hard would it be to run it on RaspberryPi ? (let's say RaspberryPi 400, the one that is within keyboard case)
The reason I ask: for the past six months I've been dipping my toes in OS development for x86 with BIOS, SVGA and ATA interfaces: https://github.com/akkartik/mu And I'm way out of my depth. I have this suspicion that x86 might be one of the more difficult environments for device drivers, so I'm curious to hear what other hardware looks like.