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  • HyperCard

    calendar Feb 23, 2023 路 1 min read
     it retro-computing
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    Hypercard era un software per Mac nato nel lontano 1987, che consentiva di creare presentazioni interattive, a meta’ strada tra i concetti cari agli ipertesti e alle slide che sarebbero venute poi (Powerpoint e’ apparso nel 1990).


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  • La tastiera del C/64 e del Vic20

    calendar Mar 13, 2023 路 2 min read
     it retro-computing  路 6502 c64 vic20
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    Le tastiere moderne sono piene di microchip, e tipicamente offrono una interfaccia seriale per comunicare la vostro PC i tasti premuti. Negli allegri anni ottanta non era per niente cosi'.

    Le tastiere del Vic20 e del C/64 erano interruttori (switch) completamente prive di intelligenza. Per esempio nel C/64-C/128 il tasto RESTORE, se premuto, attivava direttamente l’interrupt non mascherabile NMI, e quindi funziona anche se il vostro programmino BASIC fosse in un un loop infinito. Ma procediamo con ordine


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  • Quando tutto ebbe inizio

    calendar Apr 23, 2023 路 4 min read
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    Credo sia successo nel 1985, quando avevo undici anni. Il Vic20 era uscito nel 1981 in America, e lo vidi per la prima volta a casa di un mio zio in una estate del 1984 circa. Doveva costare intorno alle 200.000-230.000 lire (!). e uno stipendio decente doveva stare sul milione/milione e mezzo di lire.


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  • Latency numers every programmer should know

    calendar Aug 23, 2023 路 2 min read
     en featured knowledgebase lang retro-computing software
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    Modern computer are very very very fast. C/64 was about 1Mhz and you can hangs it just throwing a 10.000 cycle in interpreted BASIC v2 language.


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  • Thank you CommanderX16 web demo!

    calendar Dec 8, 2023 路 1 min read
     en retro-computing  路 commanderx16
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    Hi, it was a very pleasant surprise to find out my maze demo code on the Commander X16 Web emulator. As you can image it was done collecting example on a popular site called 10print.org and it is nice because you can run it on possibly all Commodore 8bit computers (from PET to C/128 and to CommanderX16 too!). By the way the emulator is worth a try: for more example take a look to the official GitHub demo repo


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Giovanni Giorgi

Master Solution Architect, father and free spirit.
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    Last updated:2025-05-02 02:00
    Giovanni Giorgi

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