I found the answer, and it was the most obvious, of course.
The SMS pause button is configured as the Port 1 Start button in retroarch, so whatever input I bin to Port1 Start does the job. Fortunately this still works if I have the input type as Light Phaser.

@DTEAM

I switched to lr-picodrive for SMS/GG/Genesis/Sega CD/32x a few years ago when there was some kind of breakthrough on the devs' part in terms of accuracy and compatibility, even on my x86 machines.

The speed of the thing is incredible (It can run Sega CD games full speed on a Pi Zero W!) and the accuracy is also good. It even emulates weirder things like the YM2413 synth chip the Japanese SMS had.

@JimmyFromTheBay said in Does Megumi Rescue (Sega Master System) work on anything?:

FBNeo-SMS gets closest - the game starts but the controls are totally wonky. Right and left are back to front and you can't move into the left-hand half of the screen.

The arcade version works properly in FBNeo, i don't know about the sms version (probably nobody tried it), i'll try to take a look soon.

@deltagemini That looks fantastic!

@barbudreadmon said in lr-genesis-plus-gx master system sound garbled after restoring save states - all games affected:

@uncledisgusting said in lr-genesis-plus-gx master system sound garbled after restoring save states - all games affected:

My pi 4 isn't overclocked - what settings would you suggest I use for that please?

I don't have any recommendation, as i said i don't own a pi4. I'm just thinking that garbled sound can be the result of performance issues, and gpgx appears to be surprisingly demanding. So i'm wondering if an overclock could improve things.

@uncledisgusting said in lr-genesis-plus-gx master system sound garbled after restoring save states - all games affected:

should they be enabled?

Probably not, they are features that will lessen performances.

On a sidenote, savestates with the nuked setting appear to be broken to me : i just tried loading my savestates from yesterday and the core crashed, after some more tests it appears the core can't load savestates from another session on my setup (it works just fine if i set it to MAME). That might be related to your issue. Maybe report this to the author, and/or change setting/emulator.

There are no performance issues whatsoever playing a game with nuked sound in the initial session

Your sidenote issue IS the issue that I have been concerned with the whole time. Thank you for corroborating that. I think this emulator is the only one with nuked fm sound.

According to the manual, it can be played with the Light Phaser or the Controller, but the controller should be in Port 2.

You can choose, in the Port 1/2 controls sub-menus, to which console port the controllers are mapped. If you map the 1st controller to Port 2 and vice-versa (2nd controller to Port 1), this will enable you to play using the controller, without a light gun device - the game will detect you have the controller in the 2nd port and start without light gun support.

@Protocultor said in New scriptmodule for Master System & Game Gear emulator:

Seeing that I've created a second scriptmodule for another Sega 8 bit core, this time I've opted to do a PR for both:
https://github.com/RetroPie/RetroPie-Setup/pull/3170
I hope this one has a future.

Just in case, Gearsystem, the new core, is not better than SMSPlus-GX, but has SG-1000 support.

SMSPlus-GX looks interesting. Thank you for submitting a PR and keep submitting them and don't be discouraged! 😊

Looks like you've not defined a Hotkey when asked in EmulationStation input mapping - that's why B resets the current game.
What version of RetroPie are you using ? Can you add more info about your setup, as detailed in https://retropie.org.uk/forum/topic/3/read-this-first ?

Yeah. I guess you're right.

@Clyde said in My SEGA Master System RetroPie build (in progress - almost done):

Very nice! I always liked the design of the Sega Master System, much more than the JP & US versions of the Famicom/NES. The LEGO is a nice geeky way to fix things. 🤓

Thanks!
I love the SMS design too. The SG-1000II and the Mark III are beautiful too.
The LEGOs, super glue and hot glue did the job great!

I updated the core and it still doesn't work. Nestopia and AdvMame all work great for me with no calibration/tweaking needed. Just plug and play. Nothing works on Genesis Plus for me, re: light guns.

@mswer Maybe the ROM file is corrupted. Re-copy the ROM back to the ROM folder and retry.

I use the lr-genesis-plus-gx emulator and I have no problems. with the lr-picodrive emulator it does not work

@iyonuk Genius ✅

@obsidianspider thanks. I knew it was gonna be some simple Simon thing.

@pikgoggle while in the game you need to go into the retroarch gui. In quick menu, options i believe it is, you need to set all regions to output pal or ntsc or whatever region you use.

Thanks - but I don't think it's a Dolphinbar specific issue. I can get it to crash with just a plain old keyboard/mouse switch too.

Doing a bit of debugging work I have found if I comment out this bit of code on line 2489 of libretro.c it no longer crashes. You lose the crosshairs obviously but otherwise it works fine, so it seems that something in the crosshair generating code is related to the crash. At least now I've got an idea of where the crash is originating from, I'll see if I can debug further and once I've got some better idea of the root cause I can post the issue to the core's github repo for further discussion.

Lines 2487 - 2490 on libretro.c

if (input.system[0] == SYSTEM_LIGHTPHASER) { //draw_cursor(input.analog[0][0], input.analog[0][1], 0x001f); }

@titchgamer Good to hear you were able to solve.
Yes, sometimes things can really get messed up.
Backup is your friend ;-)

Thanks for the quick reply! I guess I was having a brain fart that was easy lol