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Michael Engel @me_@sueden.social · 6d ago
I'm investigating the original Berkeley RISC-I CPU out of historical interest and wonder why some instructions use more than one opcode (e.g. LDHI uses 16 opcodes 0x70...0x7F). I can't see why this is necessary – is this an optimization or am I missing something here? Details seems to be provided in Corcoran, G.T., "Using ISPS to Specify the RISC I Architecture and Implementation," Master's Report, UCB (Dec. 1980), but I can't find this online. #risc #berkeley #ucb #comparch #processor
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LPI
Linux Professional Institute @LPI@fosstodon.org · Jul 11, 2026
Many technologies in modern computing have been influenced by BSD. Part 2 of this Andrew Oram series explores BSD’s contributions to email and BSD’s impact on operating systems and programmer tools through BSD Jails, Berkeley Packet Filter (BPF), and other innovations! Explore: https://lpi.org/1v8r @FreeBSDFoundation@mastodon.social #FreeBSD #BSD #Linux #opensource #TechHistory #freebsdfoundation #unix #freesoftware #linux #OS #Berkeley #LPI
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ARG
A Radical Guide @ARG@kolektiva.social · Apr 28, 2026
East Bay Food Not Bombs has been serving free vegan meals in Berkeley and Oakland since 1991. Horizontally organized collective recovers food from stores and markets, cooks at community kitchens, serves daily near People's Park. Mobile outreach reaches houseless encampments across both cities. Food is always free and unconditional. https://www.radical-guide.com/listing/east-bay-food-not-bombs/ #FoodNotBombs #MutualAid #Berkeley #Oakland
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