= value HAS NOT BIT position

Think of a number as a sequence of switches, each of which can be on (1) or off (0). Each switch represents a bit. The HAS NOT BIT instruction will check a bit off (0), by checking the state of a specific switch within this sequence. The parameter position refers to the bit position inside the data. This value is zero based, and starts from the less significative bit and go on.

  IF x HAS NOT BIT 2 THEN: PRINT "bit 2 is 0": ENDIF

See also the following example files:

• controls_joy_02.bas
• controls_keyboard_05.bas

 HASNtBt

• Atari (400/800)
• Atari XL/XE
• Commodore 128 (MOS 8502)
• Commodore 128 (Zilog Z80)
• Commodore 64
• Commodore 64+REU
• TRS-80 Color Computer
• TRS-80 Color Computer 3
• ColecoVision
• Amstrad CPC 664
• Dragon 32
• Dragon 64
• Thomson MO5
• Thomson MO5
• Olivetti Prodest PC128
• Commodore PLUS/4
• SEGA SC-3000
• SEGA SG-1000
• VG-5000
• Commodore VIC-20
• ZX Spectrum 48

HAS NOT BIT

IS IS NOT

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!