**************************************************** _____ ___________ ____ _ _ _ _ _______ __ | _ / ___| ___/ / | | | | | \ | |_ _\ \ / / | | | \ `--.| |_ / /`| | | | | | \| | | | \ V / | | | |`--. \ _/ / | | | | | | . ` | | | / \ \ \_/ /\__/ / |/ / _| |_ | |_| | |\ |_| |_/ /^\ \ \___/\____/\_/_/ \___/ \___/\_| \_/\___/\/ \/ **************************************************** Running OSF/1 under gxemul --------------------------- gxemul is a machine simulator http://gavare.se/gxemul/ that can simulate a number of machines. We will be concerned here with the early alpha version of OSF/1. DEC's first release of OSF/1 (OSF/1 Release 1.0) in January 1992 was for its line of MIPS-based DECstation workstations,[2] however this was never a fully supported product. I have tested and compiled gxemul via pkgsrc framework https://www.pkgsrc.org/ Pkgsrc is highly portable and can be bootstrapped on multiple UNIX like systems I have compiled it on MacOS Big Sur M1 Just make sure you have the ARM64 XQuartz installed and Xcode MIPS OSF/1 disk images are here, please uncompress them disk1.img.xz disk2.img.xz Just unxz these archives and place the loader script in the path gxemul -M 128 -e 3max -d disk1.img -d disk2.img Root password is: p4ssw0rd User password is: p4ssw0rd There is GCC-2.7.2.3 in your path to compile some code And a bunch of tools for you to play around in /usr/local Some good reference https://kb.pocnet.net/wiki/OSF/1_1.0 (if you want to be hardcore)