pdp7-unix
freebsd-src
pdp7-unix | freebsd-src | |
---|---|---|
4 | 133 | |
411 | 7,472 | |
- | 0.6% | |
2.6 | 10.0 | |
8 months ago | 5 days ago | |
Assembly | C | |
GNU General Public License v3.0 only | GNU General Public License v3.0 or later |
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pdp7-unix
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Making NetBSD Multiboot-Compatible (2007)
TIL there is a version of UNIX for PDP-7, and PDP-7 did not have MMU, therefore UNIX by definition do not require MMU, and that version of UNIX had been archeologied in a runnable form on GitHub[1]
1: https://github.com/DoctorWkt/pdp7-unix
- Unix Edition Zero
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Where to find the original Unix image file?
I've never heard of a copy being used outside of the original authors' site. However, it can be built from source code and run on a PDP-7 emulator. https://github.com/DoctorWkt/pdp7-unix.
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Apple M1 Assembly Language Hello World
Well first of all I was wrong -- the PDP7 did have syscalls, I'm just bad at reading PDP7 assembly and missed the dispatcher. Curiously, it looks like the sequence is entirely different, although there could be some magic that makes the order different than it appears at first glance.
https://github.com/DoctorWkt/pdp7-unix/blob/master/src/sys/s...
It's all just guessing, but I figure the explanation is much simpler -- for PDP11 UNIX, they just kept using the same syscalls up till V7 / 2BSD, and there should have been a sort of "rolling release" binary compatibility. For the VAX, the first port (32v) probably just retained the original numbering since there was no reason to deviate from it, which colored 3BSD and 4BSD, hence {Net,Free,Open}BSD and Darwin and friends.
Worth pointing out that several versions of Linux have rather different syscall tables. 32 bit ARM and x86 are more-or-less matches, with ARM differing on a few early syscalls, while 64 bit ARM and amd64 differing quite dramatically. The old ABI for 32bit MIPS also matches, but both the n32 and n64 ABIs use slightly variant syscall tables. PowerPC 32/64 bit is also a close match, although it has some impedance (I think it matches closer to AIX by design)
At the end of the day, I think the similarity is mostly a mixture of coincidence, system developers being influenced by their bootstrap system's syscall tables, and no real reason to change them up. No reason to not change them, either, since it's pretty trivial to use different dispatch tables for different types of processes, like how the BSD's handle other-OS compat.
freebsd-src
- You shouldn't run a BSD on a PC
- Linux Crisis Tools
- What about the vfs.zfs.bclone_enabled sysctl now?
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Personal FreeBSD PKGBASE Update Server
2023-06-26: https://github.com/freebsd/freebsd-src/commit/ee0aa1ce12b3caea34477a31e9d2111a329e33b9 to main (tagged release/14.0.0).
- What version of ZFS at FreeBSD solves the block cloning issue?
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Installing FreeBSD 14 Stable on an T480 Laptop w/ an Encrypted Home Directory
It's not yet in FreeBSD base so if you want to test it you'll have to use the patch from the PR: https://github.com/freebsd/freebsd-src/pull/881
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FreeBSD 14.0 Delivering Great Performance Uplift
Lots of great work by many people. But I bet this guy and his optimizations to the vfs and locking has made a significant impact.
https://github.com/freebsd/freebsd-src/commits?author=mjguzi...
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ZFS 2.2.1: Block Cloning disabled due to data corruption
and then there were deep concerns about the stability of same, so vfs.zfs.bclone_enabled = 0 was left in-place
https://github.com/freebsd/freebsd-src/commit/068913e4ba3dd9...
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FreeBSD 14.0-Release Announcement
Well there are some examples:
https://github.com/freebsd/freebsd-src/tree/main/share/examp...
But yeah that pf.conf could be expanded allot, but there are many source to cobble a conf together. My conf is massive but 99.9% commented out so i have my "template" for nearly everything, from mail to web to blacklistd etc.
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Git cherry-pick and revert use 3-way merge
The BSD version is sort of very recent, for what it's worth -- FreeBSD imported a not fully functional version in 2017 and has seen more work on it in 2022: https://github.com/freebsd/freebsd-src/commits/main/usr.bin/... , but the default version shipped is still GNU diff3: https://man.freebsd.org/cgi/man.cgi?query=diff3&apropos=0&se... .
What are some alternatives?
m1n1 - A bootloader and experimentation playground for Apple Silicon
podman - Podman: A tool for managing OCI containers and pods.
HelloSilicon - An introduction to ARM64 assembly on Apple Silicon Macs
musl - unofficial musl mirror git://git.musl-libc.org/musl
retrobsd - Main RetroBSD Operating System
darwin-xnu - Legacy mirror of Darwin Kernel. Replaced by https://github.com/apple-oss-distributions/xnu
unix-history-repo - Continuous Unix commit history from 1970 until today
src - Read-only git conversion of OpenBSD's official CVS src repository. Pull requests not accepted - send diffs to the tech@ mailing list.
unix-jun72 - The working source code to PDP-11 Unix from 1972.
coreutils - upstream mirror
LiteBSD - Variant of 4.4BSD Unix for microcontrollers
ravynos - A BSD-based OS project that aims to provide source and binary compatibility with macOSĀ® and a similar user experience.