In the tradition of John Lions' Commentary on 6th Edition Unix (and also the xv6 educational OS from MIT), there's now a commentary on the recently recovered V4 Unix system written by Briam Rodriguez:
https://github.com/unix-v4-commentary/unix-v4-source-commentary
In the tradition of John Lions' Commentary on 6th Edition Unix (and also the xv6 educational OS from MIT), there's now a commentary on the recently recovered V4 Unix system written by Briam Rodriguez:
https://github.com/unix-v4-commentary/unix-v4-source-commentary
New semester, new version of the xv6 educational OS for RISC-V from MIT! This is accompanied by a new revision 5 of the xv6 book and–for the first time, I think–a Lions' Commentary-style code reader booklet!
A previous version switched to using the stimecmp extension instead of the regular CLINT timer, that was a bit of a surprise. So let's see what the changes in this new version are...
https://pdos.csail.mit.edu/6.1810/2025/xv6/book-riscv-rev5.pdf
https://pdos.csail.mit.edu/6.1810/2025/xv6/xv6-src-booklet-rev5.pdf
https://github.com/mit-pdos/xv6-riscv
New semester, new version of the xv6 educational OS for RISC-V from MIT! This is accompanied by a new revision 5 of the xv6 book and–for the first time, I think–a Lions' Commentary-style code reader booklet!
A previous version switched to using the stimecmp extension instead of the regular CLINT timer, that was a bit of a surprise. So let's see what the changes in this new version are...
https://pdos.csail.mit.edu/6.1810/2025/xv6/book-riscv-rev5.pdf
https://pdos.csail.mit.edu/6.1810/2025/xv6/xv6-src-booklet-rev5.pdf
https://github.com/mit-pdos/xv6-riscv
