plusBASIC Programmer's Reference Guide - Table of Contents

Math Functions

• ABS() and SGN() - Return absolute value and signum of argument.
• INT() - Return expression rounded down to nearest integer.
• RND() - Return new or previous psuedo-random number or seeds the random number generator.
• SIN(), COS(), TAN(), ATN() - Return sine, cosine, tangent, and arctangent of argument.
• SQR(), LOG(), and EXP() - Return square root, natural logarithm, and argument to the power of e.

String Statements and Functions

• LEFT$() and RIGHT$() - Return left and right sections of a string.
• MID$() - Return or replace section of string
• STRING$() - Create string of repeated character.
• TRIM$(), TRIML$(), and TRIML$() - Remove characters from one or both ends of a string.
• FILEDIR$(), FILEEXT$(), TRIMDIR$() and TRIMEXT$() - Extract and remove path or extension from filespec.

Conversion Functions

• ASC() and CHR$() - Convert string to and from numeric ASCII code.
• BYTE() - Convert character in string to signed byte.
• HEX$(), ASC$() and DEC() - Convert byte, integer or ASCII string to and from hexadecimal string,
• LWR(), LWR$(), UPR(), and UPR$() - Convert string or ASCII code to lowercase or uppercase.
• STR$() and VAL() - Convert number to and from ASCII string.
• WORD(), WORD$(), and INT() - Convert unsigned or unsigned integer to and from two character decimal string.

Variable, Array, and Memory Statements and Functions

• CLEAR - Clear BASIC workspace or array data.
• COMPARE - Compare numeric arrays or sections of memory.
• COPY - Copy bytes from one block of memory to another.
• LEN() - Return length of string or array.

Keyboard Statements and Functions

• GETKEY and GETKEY$ - Wait for a keypress.
• INKEY and INKEY$ - Return last keypress.

Filesystem Statements and Functions

• DIR - Display disk directory.

File I/O Statements and Functions

• SAVE and APPEND - Save program or data or append data to file.

Palette Statements and Functions

• DEF RGBLIST - Define a binary string list of RGB values.
• SET PALETTE and RESET PALETTE - Set or reset palette RGB values.
• RGB() and RGB$() - Define a single RGB value.

Text Screen Statements and Functions

• COPY - Copy text screen to serial printer or to and from paged memory.
• SET BORDER and RESET BORDER - Set or reset border character and colors.
• GETBORDERCHR, GETBORDERCHR$, GETBORDERCOLOR, and GETBORDERCOLOR$ - Get current border character or colors.
• SET COLOR and GETCOLOR - Set or get default screen printing colors.

Sprite and Tilemap Statements and Functions

• DEF ATTRLIST - Create a string list of sprite and/or tile attributes.
• DEF PALETTELIST - Create a string list of palette numbers.
• DEF TILELIST - Create a string list of palette indexes.
• DEF SPRITE, SET SPRITE and GETSPRITE$ - Create a sprite definition and set and return sprite properties.
• SET TILE and GETTILE$ - Write and read tile definition to and from Video RAM.
• FILL TILEMAP - Fill tilemap with specified tile, attributes and palette.
• GET TILEMAP and PUT TILEMAP - Copy clip from array or string variable from and to tilemap.
• SET TILEMAP and TILEMAP() - Set and return tilemap cell contents.
• SET TILEMAP OFFSET, TILEMAPX, and TILEMAPY - Set and return tilemap scroll position.
• TILEOFFSET and TILEOFFSET() - Return first available tile index.