better vm launch script

launch_vm.sh

@@ -1,7 +1,23 @@
-#!/usr/bin/env bash
+set -o errexit
 
 export NIXPKGS_ALLOW_UNFREE=1
 
-RESULT=$(nix-build -E 'import ((import ./npins).nixpkgs + "/nixos")'  -A config.system.build.vm -I nixos-config=configuration.nix --no-out-link $@)
+# get script dir
+#
+SOURCE=${BASH_SOURCE[0]}
+while [ -L "$SOURCE" ]; do # resolve $SOURCE until the file is no longer a symlink
+  DIR=$( cd -P "$( dirname "$SOURCE" )" >/dev/null 2>&1 && pwd )
+  SOURCE=$(readlink "$SOURCE")
+  [[ $SOURCE != /* ]] && SOURCE=$DIR/$SOURCE # if $SOURCE was a relative symlink, we need to resolve it relative to the path where the symlink file was located
+done
+DIR=$( cd -P "$( dirname "$SOURCE" )" >/dev/null 2>&1 && pwd )
 
-$RESULT/bin/run-nixos-vm
+pushd "$DIR" || exit 1
+
+RESULT=$(nix-build -E 'import ((import ./npins).nixpkgs + "/nixos")'  -A config.system.build.vm -I nixos-config=configuration.nix --no-out-link $@) || popd || exit 1
+
+popd || exit 1
+
+echo -e "Running: $RESULT\n"
+
+"$RESULT/bin/run-nixos-vm"

retroarch/retroarch-core-options.cfg

@@ -0,0 +1,20 @@
+fbneo-allow-depth-32 = "enabled"
+fbneo-allow-patched-romsets = "enabled"
+fbneo-analog-speed = "100%"
+fbneo-cpu-speed-adjust = "100%"
+fbneo-dipswitch-dkong-Bonus_Life = "7000"
+fbneo-dipswitch-dkong-Cabinet = "Upright"
+fbneo-dipswitch-dkong-Coinage = "1 Coin  1 Credits"
+fbneo-dipswitch-dkong-Lives = "3"
+fbneo-dipswitch-dkong-Palette = "New"
+fbneo-fixed-frameskip = "0"
+fbneo-fm-interpolation = "4-point 3rd order"
+fbneo-force-60hz = "disabled"
+fbneo-frameskip-manual-threshold = "33"
+fbneo-frameskip-type = "disabled"
+fbneo-hiscores = "enabled"
+fbneo-lightgun-crosshair-emulation = "hide with lightgun device"
+fbneo-lowpass-filter = "disabled"
+fbneo-sample-interpolation = "4-point 3rd order"
+fbneo-samplerate = "48000"
+fbneo-vertical-mode = "disabled"