Posts by me_@sueden.social
(DIR) Post #AtHgukVfPJ5NjYRDn6 by me_@sueden.social
2025-04-20T13:37:25Z
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@mpweiher ...qc (32-bit PPC): TEXT main+0(SB),0,$8 MOVW j-8(SP),R9 MOVW $1,R7 BR ,4(PC) BR ,2(PC) BR ,9(PC) ADD $1,R7,R7 CMP R7,$42 BGE ,-3(PC) MOVW $3,R8 REMCC R8,R7,R5 BEQ ,2(PC) ADD R7,R9,R9 BR ,-9(PC) MOVW R9,R3 RETURN , RETURN , END ,
(DIR) Post #AtHgukyjfEL1Bi2R6G by me_@sueden.social
2025-04-20T13:38:43Z
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@mpweiher and vc (32-bit MIPS) as the last one, here you see "HI" used as a MIPS-specific register: TEXT main+0(SB),0,$8 MOVW j-8(SP),R7 MOVW $1,R5 JMP ,4(PC) JMP ,2(PC) JMP ,10(PC) ADDU $1,R5,R5 SGT $42,R5,R2 BEQ R2,-3(PC) MOVW $3,R6 DIV R6,R5, MOVW HI,R3 BEQ R3,2(PC) ADDU R5,R7,R7 JMP ,-10(PC) MOVW R7,R1 RET , RET , END ,
(DIR) Post #AtHgulYXW6ygykn1uK by me_@sueden.social
2025-04-20T13:47:47Z
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@mpweiher All of these are superficially very similar, but there are already some optimizations done in the compiler stage, e.g. using "INC" on x86 instead of adding 1 on the RISC architectures. But this is not a higher-level representation e.g. on the level of LLVM IR. Some stuff is unified, "such as left-to-right assignment order for instruction operands and the synthesis of macro instructions such as MOVE" (from [1]).[1] https://9p.io/sys/doc/asm.html
(DIR) Post #AtHguwlhpV2tkm2CSO by me_@sueden.social
2025-04-20T13:49:06Z
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@mpweiher There's an example of the abstraction level given in [2]:"For example, on the 68020 the object file may specify a MOVE instruction but the loader will decide just which variant of the MOVE instruction — MOVE immediate, MOVE quick, MOVE address, etc. — is most efficient."Indeed, it's pretty weird at first sight...[2] https://9p.io/sys/doc/comp.html
(DIR) Post #Atiyv3qN5QKgMIWxXs by me_@sueden.social
2025-05-03T17:19:32Z
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Fun at VCFe in Munich! #retrocomputing #sgi #sun
(DIR) Post #Atizon1UoP8EPJJ83k by me_@sueden.social
2025-05-03T18:08:12Z
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@publius There was a severe lack of NeXT hardware (i.e. none at all). I need to bring some of my machines next year…
(DIR) Post #Au8RkJ9dZlgkHUlUiO by me_@sueden.social
2025-05-15T13:22:41Z
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Say hello to our "new" free hardware 80-core cluster – these are Dell/Wyse 3040 thin clients (quadcore Z8350 Atom, 2 GB RAM, 8 GB eMMC, 1 GB Ethernet, only 10x10x3 cm^3 in size) which will be used for student experiments with distributed operating systems. Maybe we can revive Amoeba and build a small Plan9 cluster...#OS #Amoeba #Plan9 #Cluster
(DIR) Post #AuCMtGGXpugXRC5Tjk by me_@sueden.social
2025-05-17T22:06:28Z
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The long lost Mac Plus Japanese ROM has been found!https://www.journaldulapin.com/2025/05/17/the-lost-japanese-rom-of-the-macintosh-plus-which-isnt-lost-anymore/#retrocomputing #mac #apple #japanese
(DIR) Post #AuRAEOKmeIsAVeDLf6 by me_@sueden.social
2025-05-25T00:08:27Z
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@heatherthomasaf.bsky.social It’s all just a little bit of history repeating… https://en.m.wikipedia.org/wiki/Enabling_Act_of_1933
(DIR) Post #AupkBL799dj5svYyu0 by me_@sueden.social
2025-06-05T21:42:08Z
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In 1978, Prof. Verbaeten ported 7th Ed. Unix to the Motorola 68000 at KU Leuven in Belgium. This port is not archived at TUHS, only mentioned here:https://eng.kuleuven.be/en/stories/50-years-of-computer-science-engineeringhttps://museum.cs.kuleuven.be/misc/Tim_Ameye_Sander_Van_Loock_40-jaar.pdf (p. 12)There's also a paper describing the port which is not available:Verbaeten, P., Berbers, Y. (1983). Porting Unix. In: Proceedings of UNICOM Conference, San Diego. If you happen to have pointers to any of this, I would be happy to hear from you!#retrocomputing #unix #MC68000 #kuleuven
(DIR) Post #Auyj3suzEmOQsTOd6W by me_@sueden.social
2025-06-09T21:14:25Z
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The new Container tool in macOS Tahoe is open source (Apache-2.0 license). Here's a technical overview: https://github.com/apple/container/blob/main/docs/technical-overview.md
(DIR) Post #Avn8MNWvtSzGkLxWsq by me_@sueden.social
2025-07-04T07:38:24Z
1 likes, 0 repeats
Sommer an der Uni...
(DIR) Post #Aw6Li9pwTb2c3Vnwy8 by me_@sueden.social
2025-07-13T20:16:04Z
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@stunder Which version do you want? There are quite a number of ISOs on archive.org, e.g. 11i here: https://archive.org/details/hp-ux11i11.0
(DIR) Post #AwYb7YG61jlwiIaZ84 by me_@sueden.social
2025-07-18T21:27:05Z
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Did you know that there is not only Matt Godbolt's Compiler Explorer at https://godbolt.org, but also a Decompiler Explorer, appropriately named https://dogbolt.org, which compares the output of Ghidra, BinaryNinja, IDA and other decompilers?#decompile #ReverseEngineering
(DIR) Post #AyANyswu3SkegHxZxo by me_@sueden.social
2025-09-13T11:19:04Z
0 likes, 1 repeats
HP Integral PC - 68000 with Unix in ROM!#retrocomputing #m68k #hpux
(DIR) Post #B0SeRBFCe884gQiHqa by me_@sueden.social
2025-11-20T21:42:15Z
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Ja klasse..."" Aus "Inventing the Future Bit by Bit" von John Buck (ISBN 978-16-85837-69-3)Schnapp Dir das nächstliegende Buch.– Schlag Seite 42 auf.– Suche den 2. Satz.– Veröffentliche den Satz in einem Toot mit dem #Seite42 und schreibe die Regeln als Kommentar dazu.– Such nicht nach deinem Lieblingsbuch, dem coolsten oder geistreichsten Buch. Nimm das nächstliegende.
(DIR) Post #B1Mv0rECJLmLEsuXI0 by me_@sueden.social
2025-12-18T09:27:34Z
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@Philsan Interesting, there was a similar system for Commodore's VIC-20...https://www.zimmers.net/cbmpics/x1020.html
(DIR) Post #B1QSYYVCJrqOyAQ0Rc by me_@sueden.social
2025-12-20T02:23:46Z
1 likes, 0 repeats
@aud @SnoopJ @ricci The kernel source is in /usr/sys, the config in conf/mch.s can be switched between a PDP11/40 and 11/45, similar to 6th edition. Warren Toomey's apout seems to be able to run some of the included binaries, but I can't get the C compiler to produce an output file.
(DIR) Post #B2Lo4evI6JtUicYkYy by me_@sueden.social
2026-01-13T02:03:34Z
0 likes, 1 repeats
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#unix #pdp11 #retrocomputing #OS #johnlions
(DIR) Post #B33LPown7JiHE9KgWe by me_@sueden.social
2026-01-31T22:22:37Z
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I'm looking for a Motorola 68(EN)302 devboard and a data sheet for the MC68195 localtalk communications IC. Does anyone know where I could find one of these?#motorola #motorola68000 #electronics #retrocomputing #apple #localtalk