Module: Badline::InstructionSet::Flag

Instance Method Summary collapse

Clear carry flag.

Opcodes:

$18 - implied - 2 cycles



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# File 'lib/badline/instruction_set/flag.rb', line 10

def clc(_addr, _value)
  cycle { status.carry = false }
end

Clear decimal mode flag.

Opcodes:

$D8 - implied - 2 cycles



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# File 'lib/badline/instruction_set/flag.rb', line 18

def cld(_addr, _value)
  cycle { status.decimal = false }
end

Clear interrupt disable flag.

Opcodes:

$58 - implied - 2 cycles



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# File 'lib/badline/instruction_set/flag.rb', line 26

def cli(_addr, _value)
  cycle { status.interrupt = false }
end

Clear overflow flag.

Opcodes:

$B8 - implied - 2 cycles



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# File 'lib/badline/instruction_set/flag.rb', line 34

def clv(_addr, _value)
  cycle { status.overflow = false }
end

Set carry flag.

Opcodes:

$38 - implied - 2 cycles



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# File 'lib/badline/instruction_set/flag.rb', line 42

def sec(_addr, _value)
  cycle { status.carry = true }
end

Set decimal mode flag.

Opcodes:

$F8 - implied - 2 cycles



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# File 'lib/badline/instruction_set/flag.rb', line 50

def sed(_addr, _value)
  cycle { status.decimal = true }
end

Set interrupt disable flag.

Opcodes:

$78 - implied - 2 cycles



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# File 'lib/badline/instruction_set/flag.rb', line 58

def sei(_addr, _value)
  cycle { status.interrupt = true }
end