XC=BASIC

SWAP - [Example]

neils (neils@undisclosed.example.com) — 2026-11-01T07:49:21+00:00

SWAP [pet] [vic20] [c64] [c16] [cplus4] [c128] [x16] [m65] The SWAP command is used to exchange the values of two variables. Syntax SWAP , After the operation, the variable left will have the value of right and vice versa. Example

VOICE - [VOICE TONE]

neils (neils@undisclosed.example.com) — 2026-10-30T17:38:02+00:00

VOICE [vic20] [c64] [c16] [cplus4] [c128] [x16] [m65] Selects various properties like waveform, tone, filters, etc. of a voice. The command is also used for turning a voice on or off. The command implements a uniform interface to the VIC, TED, SID and VERA chips, however differences between the sound capabilities of these chips must be considered as explained in more details below.

Data Types - [Numeric types]

neils (neils@undisclosed.example.com) — 2026-10-20T14:06:45+00:00

Data Types XC=BASIC offers 7 built-in data types (also called primitive types): Type Numeric range Size in bytesBYTE 0 to 255 1 INT -32,768 to 32,767

Showcase

neils (neils@undisclosed.example.com) — 2026-10-20T14:03:01+00:00

Showcase Demos and games written in XC=BASIC 3. If you'd like to show your work to the World, send it to me and I'll post it here. Miami-84 by Orlof MIAMI 84 is an open-city action game for the Commodore 64. Drive through Miami, make money, raid cartel hideouts and follow Jack through a fourteen-chapter crime story where your choices lead to five possible endings.

DATA - [Syntax]

neils (neils@undisclosed.example.com) — 2026-10-08T18:07:02+00:00

DATA [pet] [vic20] [c64] [c16] [cplus4] [c128] [x16] [m65] The DATA directive puts numeric or string literal values at the memory area where it is used. Syntax DATA [AS ] [, ...] If AS is omitted, the default BYTE type will be used.

CONST - [Syntax]

neils (neils@undisclosed.example.com) — 2026-10-08T18:04:11+00:00

CONST [pet] [vic20] [c64] [c16] [cplus4] [c128] [x16] [m65] The const directive defines a constant. Constants are named values that exist in compile-time only and are replaced with their numeric value in runtime. Syntax [SHARED] CONST [AS ] =

Commander X16 support - [How to get started]

neils (neils@undisclosed.example.com) — 2026-10-08T17:48:02+00:00

Commander X16 support XC=BASIC can compile programs to the Commander X16. Everything that has been part of the core language is ported to the [x16], including sprites, sound and interrupts. In addition, a new library is available to the user to exploit some of the additional features that this machine offers.

OPTION - [Examples]

neils (neils@undisclosed.example.com) — 2026-10-08T17:45:54+00:00

OPTION The OPTION directive sets various compilation options. Most of these options can be set from the command line as well. The OPTION directive gets higher priority than command line options. Syntax OPTION [= ] Examples

INCBIN - [Syntax]

neils (neils@undisclosed.example.com) — 2026-10-08T17:44:19+00:00

INCBIN [pet] [vic20] [c64] [c16] [cplus4] [c128] [x16] [m65] Include raw binary data in the compiled program. Syntax INCBIN "path/to/binary_file" [, ] The INCBIN directive instructs the assembler to include a custom binary file. This is useful to include graphics, music or any kind of data - even machine code routines - in your program. The included file must be a path relative to the folder where the code module is.

LOCATE - [LOCATE]

neils (neils@undisclosed.example.com) — 2026-10-08T17:42:17+00:00

LOCATE [pet] [vic20] [c64] [c16] [cplus4] [c128] [x16] [m65] The LOCATE command is used to set the cursor position. Syntax LOCATE ,

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