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diff --git a/system/trs80-roms/trs80-roms.SlackBuild b/system/trs80-roms/trs80-roms.SlackBuild
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+#!/bin/bash
+
+# Slackware build script for trs80-roms
+
+# Written by B. Watson (urchlay@slackware.uk)
+
+# Licensed under the WTFPL. See http://www.wtfpl.net/txt/copying/ for details.
+
+# 20230516 bkw: v20230516, add NewDOS image for Model I.
+
+cd $(dirname $0) ; CWD=$(pwd)
+
+PRGNAM=trs80-roms
+VERSION=${VERSION:-20230516}
+BUILD=${BUILD:-1}
+TAG=${TAG:-_SBo}
+PKGTYPE=${PKGTYPE:-tgz}
+ARCH=noarch
+
+if [ ! -z "${PRINT_PACKAGE_NAME}" ]; then
+  echo "$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE"
+  exit 0
+fi
+
+TMP=${TMP:-/tmp/SBo}
+PKG=$TMP/package-$PRGNAM
+OUTPUT=${OUTPUT:-/tmp}
+
+set -e
+
+PKGROMS=$PKG/usr/share/trs80-roms
+PKGDOC=$PKG/usr/doc/$PRGNAM-$VERSION
+rm -rf $PKG
+mkdir -p $TMP $PKGROMS $PKGDOC $OUTPUT
+cd $PKGROMS
+
+# There is no "source" directory; everything is extracted directly
+# to $PKG.
+
+# Model I: level1.rom and level2.rom
+unzip -q $CWD/trs_roms.zip
+
+# Model III and 4: model3.rom and model4.rom.
+# Do not use the model4p.rom from this zip file, it won't work with
+# sdltrs or xtrs.
+unzip -LL -q $CWD/trs80-62.zip 'model?.rom'
+
+# Model 4P: model4p.rom. Both emulators can actually get by without this
+# (they have a built-in "hack" ROM that can boot a disk), but for
+# versimilitude, let's include the real deal. This is a split MAME ROM,
+# we have to combine the parts for xtrs and sdltrs.
+unzip -q $CWD/trs80m4p.zip 8075332.u69 8049007.u103
+cat 8075332.u69 8049007.u103 > model4p.rom
+rm -f 8075332.u69 8049007.u103
+
+# LS-DOS (not a ROM, a disk image). The zip file comment goes in $PKGDOC,
+# since it's useful documentation.
+unzip -q $CWD/ld4-631.zip
+unzip -z $CWD/ld4-631.zip > $PKGDOC/ld4-631.txt
+
+# 2 more disk images: cpmutil.dsk and utility.dsk. These ship with both
+# sdltrs and xtrs, and are identical in both source tarballs.
+tar xf $CWD/xtrs-4.9d.tar.gz --strip-components=1 --wildcards '*.dsk'
+
+# Another disk image: a bootable DOS for the Model I.
+cat $CWD/NEWDOS_80sssd_jv1.DSK > newdos_80sssd_jv1.dsk
+
+chmod 644 *
+chown root:root *
+
+# No docs, include our own README (better than nothing).
+cat $CWD/README > $PKGDOC/README
+cat $CWD/$PRGNAM.SlackBuild > $PKGDOC/$PRGNAM.SlackBuild
+
+mkdir -p $PKG/install
+cat $CWD/slack-desc > $PKG/install/slack-desc
+
+cd $PKG
+/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE