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Getting the address of a BASIC variable can be useful if you want to pass data to a machine code routine or want to access the bytes of a variable directly to improve speed and reduce garbage collectio...   Read More

Saving and loading memory is quite easy on the VIC-20 once you know how. However, it isn't obvious how to do this and therefore this article will present a few simple ways of doing it from BASIC and A...   Read More

BASIC programs are stored in memory using a simple structure that we can investigate and manipulate. This article will show how they are stored and contains a BASIC program to go through each line of ...   Read More

BASIC programs often contain machine code routines but they take up quite a lot of space in BASIC. An interesting way to reduce the amount of space that they take is to store the machine code in REM s...   Read More

To make machine language programs more friendly it's nice to add a Basic stub which contains a line with a SYS statement to start the code. This is easy to do on the VIC-20 and the process gives you a...   Read More

petcat is a utility provided with the VICE Commodore emulator that you can use to convert Basic source code contained in ASCII text files to .PRG files or vice versa. It is also able to convert ASCII ...   Read More

There are a number of programs that allow you to use 40 columns of text from Basic on a Commodore VIC-20. This can be useful as by default the Vic's screen is 22 columns by 23 rows. They are supplied...   Read More

There are a few machines I'm quite interested in comparing so I decided to create a simple Basic benchmark to get an idea of their relative speed. The benchmark tests 7 aspects and is inspired by qsbb...   Read More