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

Oggi parleremo della mappa di memoria del C/64. Dovete sapere che programmare il C/64 era complicato per diverse ragioni:

Negli anni'80, il MOS 6502 fu uno dei chip di maggior successo: era alla base dei Computer Commodore ma anche dell’Apple II e dell’Atari 2600. Un latro protagonista di quell’era fu lo Z80, inventato da Federico Faggin e compatibile a livello binario con l'8080, ma con molte piu’ feature.

On these days I stumbled upon Forth, a 1970 programming language which is quite similar to HP48 internal programming language.

I chip con set di istruzione complesso sono chiamati “CICS”, mentre quelli con un set “ridotto” sono chiamati RISC. Storicamente i CICS hanno invaso il mercato prima, in modo un po’ controintuitivo.

Do you STILL love taking notes by hand? I have created different types of composition notebook, even retro-style one, inspired by MOS6502, with Sprite Editor sheets, and some nice goodies. Give them a try!

Do you STILL love taking notes by hand? I have created different types of composition notebook, even retro-style one, inspired by MOS6502, with Sprite Editor sheets, and some nice goodies. Give them a try!

Due to COVID19 pandemic, I and my family was forced in our home. So I revamped my 8bit computer book, with a new look and a nice search engine.

Turbo Rascal is a development environment for the Commodore computers but also for others like NES and so on.

I am happy to announce pyc64 now supports save and load programs on top of real emulation. Irmen point me to the right code to look, and I implemented the fix in the weekend; happy hacking!

The first draft of my book is here! Take a look to http://8bit.gioorgi.com/

Hi all! I decided to write a book called “8-Bit Computers: Retro computer history in the ‘80”. It is my first book on this topic, so I need you comments & advices! A small extract is right here for download.

When I was young I was able to play with my Vic20/Commodore64. I learned to love programming with these small 8-bit real computers. I was between 11 and 12 years old, and just learning basic English, with only a data-casette to store my stuff.