Table of Contents

CHARAT

PET VIC20 C64 C16 Plus4 C128

The CHARAT command outputs a single character at the given X and Y position of the currently selected screen without affecting the cursor position.

Syntax

CHARAT <x_pos>, <y_pos>, <screencode> [, <color>]
  • <x_pos> must be between 0 and the screen width minus one
  • <y_pos> must be between 0 and the screen height minus one
  • <screencode> must be between 0 and 255
  • <color> is optional. If provided, it must be between 0 and 15 (between 0 and 255 on the Commodore-16 and Plus/4). If not provided, the character color will be whatever value happens to be in its Color RAM location.

Note

Color values between 8 and 15 will set the character to multicolor mode on the Commodore VIC-20.

Note

Setting the <color> parameter has no effect on the Commodore PET.

Warning

The runtime library will not check if the X and Y values are within the screen boundaries. Providing wrong values will lead to writing to memory locations outside the screen memory, thus potentially damaging the program or data. Use it with care.

Examples

REM put an 'A' character near the center of the screen
CHARAT 20, 10, 1
REM put a 'B' character in the top left corner of the screen, in yellow
CHARAT 0, 0, 2, 7

See Also