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lib/Acme/6502.pm  view on Meta::CPAN

Create a new 6502 CPU.

=item C<call_os( $vec_number )>

Subclass to provide OS entry points. OS vectors are installed by calling
C<make_vector>. When the vector is called C<call_os()> will be called
with the vector number.

=item C<get_a()>

Read the current value of the processor A register (accumulator).

=item C<get_p()>

Read the current value of the processor status register.

=item C<get_pc()>

Read the current value of the program counter.

=item C<get_s()>

Read the current value of the stack pointer.

=item C<get_x()>

Read the current value of the processor X index register.

=item C<get_y()>

Read the current value of the processor X index register.

=item C<get_xy()>

Read the value of X and Y as a sixteen bit number. X forms the lower 8
bits of the value and Y forms the upper 8 bits.

=item C<get_state()>

Returns an array containing the values of the A, X, Y, S, P and SP.

=item C<set_a( $value )>

Set the value of the processor A register (accumulator).

=item C<set_p( $value )>

Set the value of the processor status register.

=item C<set_pc( $value )>

Set the value of the program counter.

=item C<set_s( $value )>

Set the value of the stack pointer.

=item C<set_x( $value )>

lib/Acme/6502/Tube.pm  view on Meta::CPAN

    $cpu->set_pc(0x8000);
    $cpu->set_a(0x01);
    $cpu->set_s(0xFF);
    $cpu->set_p(0x22);

    # Run
    $cpu->run(2000_000) while 1;
  
=head1 DESCRIPTION

Emulates an Acorn BBC Micro 6502 Tube second processor. You'll need
to find your own language ROM to load and it's only been tested with
BBC Basic II.

=head1 INTERFACE 

See L<Acme::6502>. C<Acme::6502::Tube> is an C<Acme::6502> instance that
has been initialised with a skeleton Tube OS.

=head1 CONFIGURATION AND ENVIRONMENT