BASIC Stringlist Statements

DEF ATTRLIST

TYPE: plusBASIC string statement

FORMAT: DEF ATTRLIST var$ = attribute_list

Action: Creates a string list of tile attributes.

• var$ is a simple string variable which will contain the list.
• attribute_list is a comma-separated list of tile or spritle attributes.
  • Each attribute can be a numeric or (as of v0.23v) string expression.
    • The value of a numeric attribute value can be calculated by adding the following values for each desired property:
      • 2 = Horizontal Flip
      • 4 - Vertical Flip
      • 8 - Double Height (sprite only)
      • 64 - Priority
    • A string attribute may contain one or more of the following letters, either upper or lowercase:
      • H - Horizontal Flip
      • V - Vertical Flip
      • D - Double Height (sprite only)
      • P - Priority
    • • Illegal Quantity error results if a numeric attribute is greater than 256 or string attribute contains any character other than the ones listed.

Examples

DEF ATTRLIST A$ = 64, 68, 66 `

Creates an attribute list of

• priority
• priority and vertical flip
• priority and horizontal flip

DEF ATTRLIST A$ = "PH", "PV", "PD",

Creates an attribute list of

• priority and horizontal flip
• priority and vertical flip
• priority and double height

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DEF BYTELIST

TYPE: plusBASIC string statement

FORMAT: DEF BYTELIST var$ = byte_list

Action: Creates a string list of 8-bit numbers.

• Each number will be stored as one characters, making the resulting string length the same as that of the list.
• Illegal Quantity error results if number is not in the range -256 through 255.
• Numbers less than 0 are treated as twos-complement, resulting in binary value of 256 + number.

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DEF INTLIST

TYPE: plusBASIC string statement

FORMAT: DEF INTLIST var$ = integer_list

Action: Creates a string list of 16-bit numbers.

• Each number will be stored as two characters, making the resulting string length twice that of the list.
• Illegal Quantity error results if number is not in the range -65535 through 65535.
• Numbers less than 0 are treated as twos-complement, resulting in binary value of 65536 + number.

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DEF PALETTELIST

TYPE: plusBASIC graphics statement

FORMAT: DEF PALETTELIST var$ = palette_list

Action: Creates a color palette list.

• var$ is a simple string variable which will contain the list.
• palette_list is a comma-separated list of palette numbers.
  • Illegal Quantity error results if the palette number is not in the range 0 through 3.

Example

DEF PALETTELIST C$ = 2,2,3 `

Creates a color palette list consisting of palette numbers 2, 2, and 3.

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DEF TILELIST

TYPE: plusBASIC string statement

FORMAT: DEF TILELIST var$ = tile_list

Action: Creates a color index list.

• var$ is a string variable or string array element.
• tile_list is a comma-separated list of tile indexes in the range 0 through 511.

Example

DEF TILELIST A$ = 13, 13, 14

Creates a tile list consisting of tile indexes 13, 13, and 14.