December 23, 2025
Boots, tapes, and spicy debates
Here you can find the contents of the Unix v4 tape ready for bootstrapping
Ancient UNIX v4 is alive: a dusty tape sparks nostalgia wars and victory laps
TLDR: A ready-to-boot copy of 1970s UNIX v4 is now available, complete with tape and disk images for emulators. Commenters split between celebrating the digital archaeology and wondering what it’s good for, while links show the tape’s first read and the system booting—pure retro tech theater.
A working, bootable dump of vintage UNIX v4 just landed, and the comments instantly turned into a full-on nostalgia festival with a dash of gatekeeping. The post includes a ready-to-run tape file, a disk image from an old removable “pizza-sized” disk (RK05), and a simple how-to that basically goes: press ‘k’, type ‘unix’, boom—root login. The author admits it’s actually easier to install straight from the tape than to hand-extract the bits, which the purists gleefully seized on as proof that old-school simplicity still slaps. For the curious: PDP-11 is a 1970s minicomputer, SIMH is a software emulator that pretends to be that hardware, and the tape is, well, a digital version of reel-to-reel nerd magic.
The drama? Veterans vs. spectators. One camp is cheering digital archaeology (“we resurrected history!”), while another camp playfully side-eyes the practical value (“cool, but are we running Wordle on this?”). ChrisArchitect’s “Earlier” link hints at long-running obsession, and qingcharles drops receipts for the tape’s first read plus the emulator actually booting. Memes flew: “Two-key boss fight: press k, type unix,” and “strip the tape’s block sizes—aka removing vintage shrink-wrap.” It’s equal parts museum tour and victory lap, with commenters split between pure vibes and show me the use case—and everyone agreeing the whirr of a virtual tape is peak nerd ASMR.
Key Points
- •A complete UNIX v4 tape package is provided, including unix_v4.tap, unix_v4.tar, bootstrap, disk.rk, install.ini, and boot.ini.
- •unix_v4.tap is block-based; manual extraction requires stripping block size headers to obtain raw content.
- •The recommended approach is to install directly from the tape using SIMH’s PDP-11 emulator.
- •Installation copies an RK05 image from tape to disk (select ‘k’ for RK05) with disk offset 0, tape offset 75, and count 4205.
- •After installation, the system can boot via uboot from the RK05 boot sector without requiring the tape.