NAME

CPU::Emulator::Z80::Register16 - a 16 bit register for a Z80

DESCRIPTION

This class implements a 16-bit register for a Z80.

METHODS

new

Returns an object. Takes two or three named parameters:

cpu

mandatory, a reference to the CPU this register lives in, mostly so that operations on the register can get at the flags register.

and either of:

value

The value to initialise the register to;

or

get, set

Subroutines to call when getting/setting the register instead of the default get/set methods. The 'get' subroutine will be passed no parameters, the 'set' subroutine will be passed the new value. Consequently, they are expected to be closures if they are to be of any use.

get

Get the register's current value.

set

Set the register's value to whatever is passed in as a parameter.

add

Add the specified value to the register, frobbing flags

sub

Subtract the specified value from the register.

inc, dec

These use the implementation from the parent class

BUGS/WARNINGS/LIMITATIONS

None known.

AUTHOR, LICENCE and COPYRIGHT

Copyright 2008 David Cantrell <david@cantrell.org.uk>

This module is free-as-in-speech software, and may be used, distributed, and modified under the same terms as Perl itself.

CONSPIRACY

This module is also free-as-in-mason software.