package CPU::Emulator::6502::Op::LDY;
use strict;
use warnings;
use constant INSTRUCTIONS => {
0xA0 => {
addressing => 'immediate',
cycles => 2,
code => \&ldy,
},
0xA4 => {
addressing => 'zero_page',
cycles => 3,
code => \&ldy,
},
0xB4 => {
addressing => 'zero_page_x',
cycles => 4,
code => \&ldy,
},
0xAC => {
addressing => 'absolute',
cycles => 4,
code => \&ldy,
},
0xBC => {
addressing => 'absolute_x',
cycles => 4,
code => \&ldy,
},
};
=head1 NAME
CPU::Emulator::6502::Op::LDY - Load Y register from memory
=head1 SYNOPSIS
=head1 DESCRIPTION
=head1 METHODS
=head2 ldy( $addr )
Loads the Y register from C<$addr>.
=cut
sub ldy {
my $self = shift;
my $reg = $self->registers;
$reg->{ y } = $self->RAM_read( shift ) & 0xff;
$self->set_nz( $reg->{ y } );
}
=head1 AUTHOR
Brian Cassidy E<lt>bricas@cpan.orgE<gt>
=head1 COPYRIGHT AND LICENSE
Copyright 2007 by Brian Cassidy
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.
=head1 SEE ALSO
=over 4
=item * L<CPU::Emulator::6502>
=back
=cut
1;