https://xc-basic.net/ 2026-09-26T09:50:04+00:00 https://xc-basic.net/ https://xc-basic.net/lib/exe/fetch.php?media=wiki:dokuwiki.svg text/html 2026-09-18T18:34:29+00:00 jjflash (jjflash@undisclosed.example.com) https://xc-basic.net/doku.php?id=xor&rev=1789756469&do=diff XOR [pet] [vic20] [c64] [c16] [cplus4] [c128] [x16] [m65] The XOR operator performs a bitwise exclusive-or operation. Syntax <operand> XOR <operand> Both operands can be any type of numeric expression except FLOAT. text/html 2026-09-18T18:33:10+00:00 jjflash (jjflash@undisclosed.example.com) https://xc-basic.net/doku.php?id=x16_copy_mv&rev=1789756390&do=diff X16_COPY_MV [x16] (Defined in x16.bas) The X16_COPY_MV subroutine copies an area of RAM to the VRAM. Subroutine header SUB X16_COPY_MV (srcAddr AS WORD, targetAddr AS LONG, cntBytes AS WORD) _ SHARED STATIC Where * scrAddr is a number between 0 and 65535 and denotes the start of the memory area in RAM text/html 2026-09-18T18:32:12+00:00 jjflash (jjflash@undisclosed.example.com) https://xc-basic.net/doku.php?id=write&rev=1789756332&do=diff WRITE# [vic20] [c16] [cplus4] [c64] [c128] [m65] The WRITE# command is used for saving the contents of a variable to a file. The file must be opened first using OPEN. WRITE #<logical_file_no>, <expression> [, <exrpession>, ... ] The WRITE# command is similar to text/html 2026-09-18T18:31:41+00:00 jjflash (jjflash@undisclosed.example.com) https://xc-basic.net/doku.php?id=word&rev=1789756301&do=diff WORD The WORD keyword can be used in several statements to designate a variable or value as a 16-bit unsigned binary number. See Data Types and DIM for more information. text/html 2026-09-18T18:30:37+00:00 jjflash (jjflash@undisclosed.example.com) https://xc-basic.net/doku.php?id=wait&rev=1789756237&do=diff WAIT [pet] [vic20] [c64] [c16] [cplus4] [c128] [x16] [m65] The WAIT command is used to halt the program until the contents of a memory location changes in a specific way. Syntax WAIT <address>, <mask> [, <trig>] The contents of the memory location are first exciusive-ORed with <trig> (if present), and then logically ANDed with <mask>. If the result is zero, the program goes back to that memory location and checks again. When the result is nonzero, the program continues with the next state… text/html 2026-09-18T18:28:25+00:00 jjflash (jjflash@undisclosed.example.com) https://xc-basic.net/doku.php?id=vscroll&rev=1789756105&do=diff VSCROLL [c64] [c16] [cplus4] [c128] [x16] [m65] Sets the vertical smooth scrolling value. Syntax ' On all Commodore platforms: VSCROLL <px> ' On the Commander X16: VSCROLL <layer>, <px> * On [c64] [c16] [cplus4] [c128] [m65], <px> is a value between 0 and 7. The default scroll value is 3. Values below this will move the screen upwards, values above this will move it downwards. text/html 2026-09-18T18:27:51+00:00 jjflash (jjflash@undisclosed.example.com) https://xc-basic.net/doku.php?id=vpoke&rev=1789756071&do=diff VPOKE [x16] Defined in X16.BAS. Set a byte in the video address space. Subroutine header SUB VPOKE (addr AS LONG, value AS BYTE) SHARED STATIC Example INCLUDE "x16.bas" ' SET THE COLORS OF THE CHARACTER ' AT (0,0) TO RED ON WHITE CALL VPOKE($1B001, 18) text/html 2026-09-18T18:26:46+00:00 jjflash (jjflash@undisclosed.example.com) https://xc-basic.net/doku.php?id=vpeek&rev=1789756006&do=diff VPEEK [x16] Defined in X16.BAS. The VPEEK() function returns the value stored in a VRAM address. Function header FUNCTION VPEEK AS BYTE (addr AS LONG) SHARED STATIC Example INCLUDE "x16.bas" PRINT VPEEK($1B000) See also * VPOKE text/html 2026-09-18T18:25:32+00:00 jjflash (jjflash@undisclosed.example.com) https://xc-basic.net/doku.php?id=volume&rev=1789755932&do=diff VOLUME [vic20] [c64] [c16] [cplus4] [c128] [m65] Sets the master volume for all voices. Syntax VOLUME [<sid_number>,] <volume> * <sid_number> is optional and defines on which SID chip the filter values should be set. If it isn't provided, it defaults to 1. This parameter is useful on multi-SID systems, for example a C64 equipped with two SID chips, or the M65 that has four SID chips. The number must be between 1 and 4. text/html 2026-09-18T18:23:46+00:00 jjflash (jjflash@undisclosed.example.com) https://xc-basic.net/doku.php?id=voice&rev=1789755826&do=diff 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. text/html 2026-09-18T18:17:00+00:00 jjflash (jjflash@undisclosed.example.com) https://xc-basic.net/doku.php?id=vmode&rev=1789755420&do=diff VMODE [c64] [c16] [cplus4] [c128] [x16] [m65] Selects the video display mode. Syntax [c64] [c16] [cplus4] [c128] [m65] VMODE [TEXT|BITMAP|EXT] [HIRES|MULTI] [ROWS <rows>] [COLS <cols>] * TEXT selects text mode * BITMAP selects bitmap mode text/html 2026-09-18T18:14:06+00:00 jjflash (jjflash@undisclosed.example.com) https://xc-basic.net/doku.php?id=vmemset&rev=1789755246&do=diff VMEMSET [x16] Defined in X16.BAS Fills an area in the VRAM with the given value. Subroutine header SUB VMEMSET (vAddr AS LONG, cntBytes AS WORD, value AS BYTE) SHARED STATIC Example INCLUDE "x16.bas" ' Clear the bitmap CALL VMEMSET(0, 11264, 0) See also text/html 2026-09-18T18:12:51+00:00 jjflash (jjflash@undisclosed.example.com) https://xc-basic.net/doku.php?id=variables&rev=1789755171&do=diff Variables XC=BASIC is a statically typed programming language which means that the type of a variable is known at compile time. All variables have a type and that type cannot change. Defining Variables In an XC=BASIC program, all variables must be defined before they're used. Either you define them using the text/html 2026-09-18T18:11:31+00:00 jjflash (jjflash@undisclosed.example.com) https://xc-basic.net/doku.php?id=val&rev=1789755091&do=diff VAL The VAL() function converts a string to a floating point number. Function header DECLARE FUNCTION VAL AS FLOAT (instr$ AS STRING) SHARED STATIC INLINE Examples DIM pi AS FLOAT pi = VAL("3.14159") text/html 2026-09-18T16:04:44+00:00 jjflash (jjflash@undisclosed.example.com) https://xc-basic.net/doku.php?id=ucase&rev=1789747484&do=diff UCASE$ The UCASE$() function converts all lowercase letters in a string to their uppercase equivalent. Function header DECLARE FUNCTION UCASE$ AS STRING (instr$ AS STRING) SHARED STATIC INLINE Examples PRINT CHR$($0e) ' switch to lowercase display PRINT UCASE$("THE String in UpperCase") ' will output: "THE STRING IN UPPERCASE" text/html 2026-09-18T15:49:04+00:00 jjflash (jjflash@undisclosed.example.com) https://xc-basic.net/doku.php?id=ti&rev=1789746544&do=diff TI [vic20] [c64] [c16] [cplus4] [c128] The TI() function returns the total count of jiffies (1/60 second time increments) since power-on. It returns the same value as the system variable TI in CBM BASIC. Header DECLARE FUNCTION TI AS LONG () SHARED STATIC INLINE text/html 2026-09-18T15:48:06+00:00 jjflash (jjflash@undisclosed.example.com) https://xc-basic.net/doku.php?id=this&rev=1789746486&do=diff THIS [pet] [vic20] [c64] [c16] [cplus4] [c128] [x16] [m65] THIS is a special variable that refers to the instance on which the method was called. Example TYPE vector x AS INT y AS INT SUB TRANSLATE(dx AS INT, dy AS INT) THIS.x = THIS.x + dx THIS.y = THIS.y + dy END SUB END TYPE DIM v AS vector v.x = 10 : v.y = 10 CALL v.TRANSLATE(5, 5) PRINT v.x, v.y text/html 2026-09-18T15:46:45+00:00 jjflash (jjflash@undisclosed.example.com) https://xc-basic.net/doku.php?id=textat&rev=1789746405&do=diff TEXTAT [pet] [vic20] [c64] [c16] [cplus4] [c128] [x16] [m65] The TEXTAT command outputs a string at the given X and Y position of the currently selected screen without affecting the cursor position. Syntax TEXTAT <x_pos>, <y_pos>, <text> [, <color>] text/html 2026-09-18T15:39:37+00:00 jjflash (jjflash@undisclosed.example.com) https://xc-basic.net/doku.php?id=tan&rev=1789745977&do=diff TAN (Defined in TRIGONO.BAS) The TAN() function returns the arctangent of the argument. The inverse function of TAN() is ATN. Function header DECLARE FUNCTION TAN AS FLOAT (x AS FLOAT) SHARED STATIC TRIGONO.BAS Example INCLUDE "trigono.bas" PRINT TAN(PI / 4) ' outputs a number very close to 1, see below note text/html 2026-09-18T15:38:29+00:00 jjflash (jjflash@undisclosed.example.com) https://xc-basic.net/doku.php?id=sys&rev=1789745909&do=diff SYS [pet] [vic20] [c64] [c16] [cplus4] [c128] [x16] [m65] The SYS commands calls a machine language subroutine at the specified address. Syntax SYS <address> [FAST] If used without the FAST directive, SYS will do the same as in CBM BASIC, that is, it will load the accumulator, the X and the Y register, and the status register from addresses $030C-$030F (on C64 and VIC-20) or $07F2-$07F5 (on CPlus/4 and C16) before the call. When the subroutine exits,