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#! /usr/bin/perl -w
# Copyright (c) 2002 Darren Salt.
# Modifications copyright (c) 2002 by Colin Watson.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# 3. The name of the author may not be used to endorse or promote products
# derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
# INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
# Make some ROMs from others + patches
use strict;
sub loadrom ($)
{
local $/ = \16384;
open ROM, '<'.$_[0] or die $^E;
my $rom = <ROM>;
close ROM or die $^E;
die "'$_[0]': bad ROM length" if length ($rom) != 16384;
return $rom;
}
sub rompatch (\$$$)
{
my $length = length ($_[2]);
substr ${$_[0]}, $_[1], $length / 2, pack ('H'.$length, $_[2]);
die 'Eek, too long ('.join (':', @_).')' if length ${$_[0]} > 16384;
}
sub saverom (\$$)
{
open ROM, '>'.$_[1] or die $^E;
print ROM ${$_[0]} or die $^E;
close ROM or die $^E;
}
# Create the TC2048 ROM from the 48K Spectrum ROM.
my $rom = loadrom ('48.rom');
rompatch ($rom, 0x129A, '6E38');
rompatch ($rom, 0x386E, 'D3FFCD0A0CC9');
saverom ($rom, 'tc2048.rom');
exit 0;
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