--- M6502/M6502.pm	2007/07/30 13:29:57	24
+++ M6502/M6502.pm	2007/07/30 17:32:41	29
@@ -3,12 +3,100 @@
 use strict;
 use warnings;
 
-# Dobrica Pavlinusic, <dpavlin@rot13.org> 07/30/07 13:23:19 CEST
-#
-# Simple Orao emulation
+use Data::Dump qw/dump/;
+use Carp qw/confess/;
 
-my $mem = (0) x 0x10000;	# 64M
+=head1 NAME
 
+M6502 - perl bindings for 6502 emulator
+
+=cut
+
+my $debug = 1;
+
+our $VERSION = qw(0.0.1);
+
+our @mem = (0xff) x 0x10000;	# 64M
+
+# program counter
 our $PC = 0xbeef;
+# CPU registars
+our ( $A, $P, $X, $Y, $S ) = (0) x 5;
+# Set IPeriod to number of CPU cycles between calls to Loop6502
+our $IPeriod = 1;
+
+=head1 init
+
+Called before C<Run6502>
+
+=cut
+
+sub init {
+	warn "inside init\n";
+	print "stdout\n";
+};
+
+=head2 read
+
+Read from memory
+
+  $byte = read( $address );
+
+=cut
+
+sub read {
+	my ($addr) = @_;
+	my $byte = $mem[$addr];
+	warn "# read(",dump(@_),") = ",dump( $byte ),"\n" if $debug;
+	return $byte;
+}
+
+=head2 write
+
+Write into emory
+
+  write( $address, $byte );
+
+=cut
+
+sub write {
+	warn "# write(",dump(@_),")\n" if $debug;
+	my ($addr,$byte) = @_;
+	$mem[$addr] = $byte;
+}
+
+=head2 poke_code
+
+Write series of bytes into memory without passing through MMU
+
+  $emu->poke_code( 0xbeef, 0xff, 0x00, 0xff, 0x00, 0xaa );
+
+=cut
+
+sub poke_code {
+	my $self = shift;
+	my $addr = shift;
+	warn sprintf("# poke_code(%04x,%s)\n", $addr, dump( @_ )) if $self->debug;
+	$mem[$addr++] = $_ foreach @_;
+}
+
+=head2 ram
+
+Read searies of bytes from memory without passing through MMU
+
+  $emu->ram( $from, $to );
+
+=cut
+
+sub ram {
+	my $self = shift;
+	my ($from,$to) = @_;
+	if ($from + $to) {
+		#printf "ram %04x - %04x\n", $from, $to;
+		return $mem[$from .. $to - 1];
+	}
+	return $mem[$from] if defined($from);
+	confess "no from address";
+}
 
 1;