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Sign up to join this community Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top Retrocomputing Beta Home Questions Tags Users Unanswered Explore our Questions Ask Question history hardware commodore-64 apple-ii amiga ms-dos ibm-pc graphics floppy-disk memory more tags Active Hot Week Month 14 votes 4 answers 625 views Is there software that will run across multiple Commodore 8-bit machines without modification? commodore-64 commodore commodore-pet vic-20 commodore-128 modified 1 hour ago Ola Ström 303 18 votes 4 answers 2k views How to interpret Dave Cutler's criticism of Unix? unix operating-system dec windows microsoft answered 2 hours ago TripeHound 627 15 votes 6 answers 4k views Purpose of turbo switch on systems unable to slow to 4.77 MHz? hardware ibm-pc modified 7 hours ago Raffzahn 89.8k 8 votes 3 answers 196 views Format of “Pound” domains in RFC 821 internet network modified 8 hours ago Manglada Tech 1 12 votes 2 answers 2k views How did I fry my SID chip? hardware commodore-64 sound sid mos-6581 modified 12 hours ago user16542 123 4 votes 2 answers 187 views Is integer arithmetic really slower than float with (early) MS-BASIC? microsoft-basic answered 15 hours ago supercat 12.8k 4 votes 4 answers 226 views Did the Apollo Guidance Computer or other multi-ROM machines subdivide code between ROM chips/modules to facilitate partial updates? history assembly apollo-guidance-computer modified 21 hours ago snips-n-snails 13.7k 49 votes 6 answers 16k views What did the 'turbo' button actually do? hardware ibm-pc answered 22 hours ago Michele Mich 1 3 votes 1 answer 152 views Cray-1 functional units cray modified yesterday dirkt 11.9k 12 votes 1 answer 2k views Why did the Apple IIe use a 2 MHz-rated 6502, even though it ran at only 1 MHz? apple-ii 6502 answered yesterday cjs 13.6k 8 votes 2 answers 584 views Is it possible to PRINT AT 23,0 in ZX Spectrum BASIC? basic zx-spectrum zx81 sinclair answered yesterday gasman 381 15 votes 3 answers 3k views How did integer multiplication work in 8-bit BASIC without CPU support z80 basic 6502 8080 modified yesterday Jean-François Fabre 1,122 3 votes 0 answers 109 views Teddy Ruxpin Animation Coding “Language”? cassette-tape asked yesterday ribs2spare 131 8 votes 1 answer 260 views Amiga ed removes flags amiga amiga-1200 shell modified 2 days ago Ola Ström 303 Browse more Questions Site Stats questions 2,978 answers 7,583 answered 97% users 11,220 visitors/day 2,823 more site stats on: Area 51 Stack Exchange Help us grow this site! 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