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Some small amount of postprocessing is required after assembling bootstrap.asm with a56. Add a script and makefile for this. Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
34 lines
996 B
Perl
34 lines
996 B
Perl
# Postprocessor for dsp56k bootstrap code.
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#
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# Copyright Ben Hutchings 2011.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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use strict;
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use warnings;
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my @memory;
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my %symbol;
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# Reconstruct memory image and symbol table
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while (<>) {
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if (/^P ([0-9A-F]{4}) ([0-9A-F]{6})\n/) {
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$memory[hex($1)] = hex($2);
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} elsif (/^I ([0-9A-F]{6}) (\w+)\n/) {
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$symbol{$2} = hex($1);
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} else {
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print STDERR "W: did not recognise line $.\n";
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}
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}
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# Concatenate first and second stage. Second stage is assembled
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# between 'upload' and 'upload_end', but initially loaded at
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# 'real' (end of the first stage).
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for (0 .. ($symbol{real} - 1), $symbol{upload} .. ($symbol{upload_end} - 1)) {
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my $word = $memory[$_] || 0;
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print pack('CCC', $word / 65536, ($word / 256) % 256, $word % 256);
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}
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