ugBASIC User Manual

   COLOR BORDER value

The COLOR BORDER command allows you to redefine the color used by the graphics chipset for the border, where this is possible. “Redefinition” means assigning one of the possible colors to specific registers called “palette registers”.

On some systems this is not possible at all, due to limitations of the chipset or the absence of registers or even of the border: for this reason, in such cases the command is ignored. On other systems this corresponds to the modification of specific registers, to which one of the available colors is assigned. On others it is possible to assign certain shades, which therefore go beyond the number of available colors.

Where it is possible to assign a shade, the value can range from 0 to the constant SHADES. However, it may be more practical to use the RGB function, which allows you to calculate the shade starting from the color components (red, green and blue).

  COLOR BORDER #$1

See also the following example files:

• control_uncond_jumps_01.bas
• control_uncond_jumps_02.bas

 CrBo

• Commodore 128 (Zilog Z80)
• Commodore 128 (MOS 8502)
• SEGA SG-1000
• ZX Spectrum 48
• Commodore 64
• Commodore VIC-20
• Atari (400/800)
• Commodore 64+REU
• Commodore PLUS/4
• Olivetti Prodest PC128
• Thomson MO5
• Amstrad CPC 664
• SEGA SC-3000
• ColecoVision
• TRS-80 Color Computer 3
• MSX
• TRS-80 Color Computer

COLOR SHADES (constant) RGB

BORDER

If you have encountered a problem using this command, if you think there is a bug or the explanation is unclear, please open an issue for this keyword on GitHub. Thank you!