[Acorn Atom and Archimedes command line]

@link182

The atom_cass softlist tapes are currently not supported. The atom_flop softlist floppies do work.

LaunchBox Associated Platforms Default Parameters
atom -flop1

Launching a game opens the Atom screen
type
*DOS and press Return
next type
*RUN
and add the usage string (including the double quotes) as listed below and press Return

Usage strings
for the 3 games Hard Hat Harry, Hyper Viper, Jet Set Miner
"LOADER"

Atomic Chuckie Egg
"CCHUCK" (for colour version)
"MCHUCK" (for mono version)

Atomic Joe Blade
"JOE"

Egghead in Space
"EHRUN"

F14 Tomcat
"F14RUN"

Galaforce
"CGALA" (for colour version)
"MGALA" (for mono version)

Galaxian
"GALAXI"

Jet Set Willy
"JSWRUN"

Jet Set Willy 2
"JSW2RUN"

Jungle Journey
"JUNGLE"

Manic Miner
"MMRUN"

Repton
"REPLOAD"

If you wish you can set per-game custom parameters to automate things.
atom -ab *DOS\n*RUN"XXX"\n -autoboot_delay 1 -flop1
where "XXX" is the game's usage string as listed above.
 

[A cat's curiosity]

I've come across a couple of items that have me intrigued.
My LaunchBox root folder has a file named profile.ini which for me has always been an empty file.
When any member's username in the forums is hovered over there's a reference to Badges which is always 0.
Anybody know what they are for?

[Launching Spacewar (PDP-1) Fullscreen or Maximized]

I'm not familiar with the emulator you're using, so I don't know just how small your very small window actually is.

The game is available as part of the pdp1_ptp software list which can be set up and emulated with MAME in LaunchBox.

[Donkey Me]

If you add it to your Windows platform you'll be able to scrape metadata and download images from the LaunchBox Games Database for it.

[Donkey Me]

It's just above DOSBox in your posted image. 

[Donkey Me]

As it's an executable, check that the Emulation tab under the game's Edit Game has the "Use an emulator to play this game" box unchecked.
And then set it up under the Launching tab. 

[Sord M5 Settings on Launchbox]

Good to know. Hopefully this will be fixed in a near future build of MAME. 

I'm on 0.261 but also using 0.239 just to be able to play Akai Katana!

[Sord M5 Settings on Launchbox]

There's a mention here about an issue with carts needing 36K RAM.
With a bit of luck it might be sorted in the next MAME build.

https://mametesters.org/view_all_bug_page.php

[Sord M5 Settings on Launchbox]

It doesn't seem to be part of the m5_cart sw folder.
However, it shows in MAME, so it may be internal, and using
m5 -cart1 em_5
may mount it.
But the m5_cart xml lists em_5 as unsupported so things may not work.

[The Acorn Electron and the GamesDB]

I use MAME to emulate the Electron cart, cass and flop software lists, and I don't bother with the rom sw list.
All 3 share a common platform in LaunchBox: I use default parameters for cassettes and set per-game custom parameters for the cart and flop formats. I don't have too many Electron games installed, so setting things manually is not a big effort.
These parameters work fine for me.

Cartridge
electron -cart1

Cassette
electron -ab *TAPE\nCHAIN\"\"\n -autoboot_delay 2 -cass

Floppy ADFS format
electron -ab "*CAT\n\n\n\n\n\n*RUN !BOOT\n" -autoboot_delay 2 -flop

Floppy DFS format
electron -exp plus1 -cart1 seds -ab "*EXEC !BOOT\n" - autoboot_delay 2 -flop

Note that some disk games may require *RUN instead of *EXEC and vice-versa.
 

[Issue with Launchbox db id]

I don't use Steam, but just using 'Assassin's Creed III' and 'Dead Island' as 2 Windows test titles scrapes ok and I get the LaunchBox DB ID #9302 and #3596 respectively and correct images download from the LaunchBox DB for both test titles.
So maybe it is to do with Steam. Hopefully a member who uses Steam will help you out here.
 

[Issue with Launchbox db id]

Have you looked at your Windows platform's 'Scrape As' value just to confirm it's set to 'Windows' and not something else?

If all is ok, can you check that the III part of your 'Assassin's Creed III' title uses the upper-case of i (I) letter and not the lower-case of L (l) one - depending on the font these can look the same on screen but the latter will throw the scraper.

[Camputers Lynx Working]

You need one of the 3 bios sets lynx48k lynx96k lynx128k
You also need the softlist folder camplynx_cass

Default Command Line Parameters are just the bios set name.

Once you launch a game you arrive at the Lynx prompt where you need to enter either MLOAD (for binary format games) or LOAD (for BASIC ones). You also need to add the game name as per the camplynx.xml - see MAME's hash folder.
Examples (note the required use of case)
MLOAD "INVADERS"
LOAD "ZombiePanic"

The tape plays automatically and once done, MLOADed games auto run. LOADed ones need you to enter RUN at the prompt.

If you want to automate things a bit with the autoboot stuff, then you need to give each game it's own custom parameters like

lynx48k -ab MLOAD\"INVADERS\"\n -autoboot_delay 2

lynx48k -ab LOAD\"ZombiePanic\"\n -autoboot_delay 2

[How do i alternately launch Launchbox in fullscreen?]

Are you saying that you want LaunchBox to completely fill the screen like BigBox does?
I may be wrong, but I don't think LaunchBox as it comes can do that.
A quick workaround is to set your Windows Taskbar to Autohide.

[Can't figure out how to launch mame SL vz_snap roms]

I'm relieved to learn that it's not an error at my end, and I know now how to handle those iffy softlist clashes.
@sundogak Thanks for all your help, much appreciated.
 

[Can't figure out how to launch mame SL vz_snap roms]

I'm still in a bit of a muddle. I've tried out several game snapshots with the LaunchBox Launching ROM File entry pointing to the game in the vz_snap folder, and I'm seeing something odd when I use the parameters
vz300 -mem laser310_16k
If a snapshot does not have a game of the same name in the vz_cass folder, then the snapshot loads fine.
But if the game also exists in the vz_cass folder, then the snapshot doesn't load and TABing into MAME's File Manager shows the snapshot empty and the cassette present and ready for loading.
Adding -dump to the parameters get's rid of this anomaly.

I've noticed the same thing with other systems that have more than one softlist. With the Sord M5 the game zacbanic.zip exists in both the m5_cart and m5_cass folders.
With LaunchBox pointed to the game in the m5_cass folder, the parameters
m5
loads the cart version.
Adding the -cass parameter loads the wanted cassette version.
I may be barking up the wrong tree but it seems to me that MAME is searching the relevant softlist folders alphabetically and picking the first match - cass is before snap, cart is before cass, cass is before flop and so on.
Any one else seeing this or is it something not setup correctly at my end?

[Can't figure out how to launch mame SL vz_snap roms]

@GIKAS1

For the snapshots try the parameters
vz300 -mem laser310_16k -dump

You can omit the full mem parameter if you wish, but then some games may return an invalid image error on snapshot loading.

Binary (M) snapshots should auto-run once loaded.
BASIC (B) snapshots once loaded need you to then enter the RUN command at the READY prompt.
 

[Can someone do an updated Apple IIGS setup Write up?]

As the Apple II GS is a computer, try enabling MAME's ui controls before using TAB.

[Background overlay for games like Asteroids Deluxe and Space Invaders?]

For, say, Asteroids Deluxe you can select the Colour Overlay from the Video Options in-game, but all this appears to do is change the game to black and cyan.
You could get the astdelux.lay and invaders.lay files from the MAME source code (src/mame/layout folder) and maybe rework them to include your bezel image.
Also see here for something a bit different. Open the link and scroll down to the astdelux and invaders artwork zip downloads - clickable previews are available.
https://mrdo.mameworld.info/mame_artwork_ingame.php

[Game not displaying fullscreen - bezel issue?]

Yes, your bezel seems to be 16:9 whereas as you say your screen is 16:10 so that may explain the top and bottom black areas. Glad that you're sorted.

[Game not displaying fullscreen - bezel issue?]

The deprecated element warning and the black bands are two separate and unrelated issues.

To get rid of the warning message, in your lay file change line 6 from
<bezel element="bezel">
to
<element ref="bezel">

and change line 8 from
</bezel>
to
</element>

[Game not displaying fullscreen - bezel issue?]

As of MAME 0.225 lay file background element instances such as for bezels are considered deprecated and that's what's triggering the warning. Things will still work ok with MAME 0.225 to the latest 0.259 but possibly not forever, and the lay file can be updated to get rid of the warning.

[How Can I Find Better Images for All Systems]

By MAME I assume you mean the arcade games. These didn't have artworked boxes like home computer and console games did.
They did have advertisement flyers/posters that folk use for front and back coverart, but spines had no meaning as such and any out there are custom made.

[Any interest on removing artefacts?]

You can always source better images yourself should you wish and submit them as replacements to the games database.
 

[Updating MAME]

If you're on MAME 0.229 and have the 0.229 full romset then you shouldn't have issues unless a particular game uses a CHD and you don't have the CHD set.
I assume that KI is Killer Instinct. As well as kinst.zip this game also needs a CHD (kinst.chd) and won't work without it.