XC=BASIC

RANDOMIZE - [Commander X16 Example]

neils (neils@undisclosed.example.com) — 2026-09-05T19:23:10+00:00

RANDOMIZE [pet] [vic20] [c64] [c16] [cplus4] [c128] [x16] [m65] The RANDOMIZE command seeds the pseudo-random generator with an initial value. Syntax RANDOMIZE The value given must be a LONG number and it will serve as a base for the random sequence.

Commands, Functions and Directives by Category - [Logical and Arithmetical]

neils (neils@undisclosed.example.com) — 2026-09-05T19:13:51+00:00

Commands, Functions and Directives by Category Building blocks * ASM * CALL * CONTINUE * DO ... LOOP * END * FOR ... NEXT * FUNCTION * EXIT * GOSUB * GOTO * IF ... THEN ... ELSE * ON ... GOTO/GOSUB * REM * RETURN * SELECT ... CASE * SUB Data & variables * @ * CBYTE * CFLOAT * CINT * CLONG * CONST * CWORD * DATA * DIM * LET * STATIC * SWAP * THIS * TYPE Arithmetic and Logical

Keywords A-Z

neils (neils@undisclosed.example.com) — 2026-09-05T19:13:17+00:00

Keywords A-Z * @ * AND * AS * ASM * BACKGROUND * BORDER * BYTE * CALL * CHARAT * CHARSET * CONST * CONTINUE * DATA * DECIMAL * DECLARE * DIM * DO * DOKE * ELSE * END * ERROR * EXIT * FAST * FILTER * FLOAT * FOR * FUNCTION * GET * GET# * GOSUB * GOTO * HSCROLL * IF * INCBIN * INCLUDE * INLINE * INPUT * INPUT# * INT * INTERRUPT * LET * LOAD * LOCATE * LONG * LOOP * MEMCPY *

neils (neils@undisclosed.example.com) — 2026-09-05T19:12:47+00:00

* Welcome to XC=BASIC 3 * Showcase * Installation and Usage * Syntax * Data Types * Variables * Operators * Arithmetic expressions * Strings * Control Flow Statements * Subroutines * Functions * User-Defined Types * Code Modules * Error Handling * File I/O * Interrupts * Keyword Reference * Function Reference * Keywords by Category * Library Reference * Appendix * Memory model * PETSCII escape sequences * Keyboard scan codes * Commander X16 …

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Anonymous (anonymous@undisclosed.example.com) — 2026-09-05T04:00:15+00:00

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Anonymous (anonymous@undisclosed.example.com) — 2026-09-04T15:30:36+00:00

Strings - [Value assignment]

neils (neils@undisclosed.example.com) — 2026-09-04T13:22:14+00:00

Strings Strings are fixed-length series of PETSCII characters. The maximum length of a string is 96 characters. String literals String literals must be enclosed between double quote (“) characters and may contain any ASCII character. Every ASCII

SHL - external edit

Anonymous (anonymous@undisclosed.example.com) — 2026-09-04T13:15:03+00:00

SHL The SHL() function returns a number bit-shifted positions to the left. Function header DECLARE FUNCTION SHL AS BYTE (num AS BYTE, n AS BYTE) SHARED STATIC INLINE DECLARE FUNCTION SHL AS INT (num AS INT, n AS BYTE) OVERLOAD SHARED STATIC INLINE DECLARE FUNCTION SHL AS WORD (num AS WORD, n AS BYTE) OVERLOAD SHARED STATIC INLINE DECLARE FUNCTION SHL AS LONG (num AS LONG, n AS BYTE) OVERLOAD SHARED STATIC INLINE

Syntax - [Whitespace]

neils (neils@undisclosed.example.com) — 2026-09-04T13:14:00+00:00

Syntax Vocabulary The following reserved keywords form the basic vocabulary of the language. The keywords may be spelled with either upper or lower case letters, or a mix of both. Therefore PRINT, print and Print are equivalent. Identifiers Identifiers are used to name constants, variables, labels, subs and functions in XC=BASIC. You may choose identifiers as you wish, following these rules:

BORDER - [Examples]

neils (neils@undisclosed.example.com) — 2026-09-04T13:13:18+00:00

BORDER [vic20] [c64] [c16] [cplus4] [c128] [x16] [m65] Sets the border color. Syntax ' Commodore-16 and Plus/4 BORDER , ' All other machines BORDER * is the color code. The accepted values are: * 0 - 7 for

BACKGROUND - [Syntax]

neils (neils@undisclosed.example.com) — 2026-09-04T13:10:38+00:00

BACKGROUND [vic20] [c64] [c16] [cplus4] [c128] [m65] Sets the background color. Syntax BACKGROUND BACKGROUND , * is the color code. The accepted values are: * 0 - 7 for [vic20] * 0 - 15 for [c64] [c16]

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Anonymous (anonymous@undisclosed.example.com) — 2026-09-04T03:01:04+00:00

File I/O - [READ and WRITE]

jjflash (jjflash@undisclosed.example.com) — 2026-09-02T12:22:51+00:00

File I/O [vic20] [c16] [cplus4] [c64] [c128] [m65] File input-output in XC=BASIC was designed to be mostly compatible with CBM BASIC so that the same commands can be used for opening, reading from and writing to files. Since XC=BASIC is a strongly typed language, and therefore it comes with restrictions, there are some small differences to be aware of. Those differences are explained on each command's reference page.

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Anonymous (anonymous@undisclosed.example.com) — 2026-09-01T22:43:34+00:00

Control Flow Statements - [DO ... LOOP loop]

neils (neils@undisclosed.example.com) — 2026-08-31T17:37:02+00:00

Control Flow Statements Conditional branching With the IF statement you can test a condition and then run code based on whether the condition test passed or failed. IF THEN END IF The IF clause runs the statements under it when the

TRIGONO.BAS - [Constants]

jjflash (jjflash@undisclosed.example.com) — 2026-08-30T15:54:10+00:00

TRIGONO.BAS The trigono.bas library implements fundamental trigonometric functions. Usage You must include the library before you can use its features (preferably at the top of your program): INCLUDE "trigono.bas" Constants SHARED CONST PI = 3.14159

X16.BAS - [Usage]

jjflash (jjflash@undisclosed.example.com) — 2026-08-30T15:32:29+00:00

X16.BAS The x16.bas library lets you access the improved functionality of the Commander X16. Usage You must include the library before you can use its features (preferably at the top of your program): INCLUDE "x16.bas" Subroutines * MEMCPYMV * MEMCPYVM *

Keyboard scan codes

jjflash (jjflash@undisclosed.example.com) — 2026-08-30T15:31:29+00:00

Keyboard scan codes Since version 3.1.13, keyboard scan codes are available as predefined constants for some targets. All you need to do is include the keyboard definition for the platform you're targeting. For example: INCLUDE "keycodes_c64.bas" ' For the Commodore-64 PRINT "press f1" DO UNTIL KEY(KEY_F1) <> 0 LOOP

Interrupts - [Raster interrupt example]

jjflash (jjflash@undisclosed.example.com) — 2026-08-30T15:29:05+00:00

Interrupts [pet] [vic20] [c64] [c16] [cplus4] [c128] [x16] [m65] XC=BASIC allows you to set up interrupting rules and write routines that handle interrupts. The supported interrupt types are: * Timer interrupts, issued after every processor cycles where is a value between 1 and 65535 (supported on all targets)

Library Reference - [Third-party Libraries]

jjflash (jjflash@undisclosed.example.com) — 2026-08-30T15:14:09+00:00

Library Reference Libraries are sets of Subroutines and/or Functions that are written in XC=BASIC or assembly language and provide shared functionality to be used in your program. Built-in Libraries The following libraries are packaged with XC=BASIC: * TRIGONO.BAS - library that implements fundamental trigonometric functions