Calling Pi 4 Atari Jaguar Fans

George Spiggott

@adambegood said in Calling Pi 4 Atari Jaguar Fans:

Yep, with .224 BIOS, this works for me now!

Did you modify the two zip files in any way or just use them as is?

jaguar.zip (containing jagboot.rom and jagwave.rom)
jaguarcd.zip (containing jag_cd.bin and jagdevcd.bin)

AdamBeGood

@george-spiggott said in Calling Pi 4 Atari Jaguar Fans:

@adambegood said in Calling Pi 4 Atari Jaguar Fans:

Yep, with .224 BIOS, this works for me now!

Did you modify the two zip files in any way or just use them as is?

jaguar.zip (containing jagboot.rom and jagwave.rom)
jaguarcd.zip (containing jag_cd.bin and jagdevcd.bin)

I just had the one jaguar.zip with everything in it. Let me double check tomorrow as to what the contents were but I think it contained jagboot.rom and jagwave.rom and then jaguarcd.zip was also within in, including the two .bin files.

I just left it as is from the .224 romset.

DTEAM

@adambegood
Another way to run jaguar with MAME standalone (like MESS without Lr)

go in /opt/retropie/configs/jaguar
open your emulators.cfg

add:

mame-jaguar= "/opt/retropie/emulators/mame/mame -c  jaguar -cart %ROM%"
mame-jaguar-autoframeskip= "/opt/retropie/emulators/mame/mame -c -autoframeskip jaguar -cart %ROM%"

Note: sometime better performance without autoframeskip and sometime with It.

To set your "Input (general)" and "Input(this Machine), follow step 10 and 11 of this Tutorial -----> Tutorial: Handheld and Plug & Play systems with MAME

For cheat codes: (SOLVED) MAME "standalone" Cheats for systems like Coleco, Arcade and more

George Spiggott

It seemed quite appropriate to resurrect this thread rather than start a new one. I noticed recently that VirtualJaguar has been updated on X86 systems and has probably been updated on the Pi as well. The update fixes several issues, most notably the weird screen shape on Atari Karts. Has anyone noticed any other improvements?

retropieuser555

@George-Spiggott I haven't had a proper look but it appears to be this change here:-

https://github.com/libretro/virtualjaguar-libretro/pull/77#issue-1453824369

Any game that changes resolution midgame should have an improvement (I'm sure most 32bit era consoles did this no in certain games? Resident evil is the classic example)

DTEAM

With Pi 5, Lr- virtualjaguar works very well for some games . Major performance gain !
Same comment for MAME 0.266, but with MAME, some games have issues.

TPR

@DTEAM said in Calling Pi 4 Atari Jaguar Fans:

With Pi 5, Lr- virtualjaguar works very well for some games . Major performance gain !
Same comment for MAME 0.266, but with MAME, some games have issues.

Just messing around with lr-vjag last night and it does appear that some games are running amazing! One question... I noticed that Tempest will throw odd glitches here and there...

Here's a screen shot...

Here is the frame just before the glitch:
tempest glitch1.jpg

And then here is the glitch:
tempest glitch 2.jpg

And then the next frame it goes back to normal. Any ideas? I have in the options Fast Blitter turned on, but that is my only option selected.

TPR

@DTEAM said in Calling Pi 4 Atari Jaguar Fans:

With Pi 5, Lr- virtualjaguar works very well for some games . Major performance gain !
Same comment for MAME 0.266, but with MAME, some games have issues.

Huh... it looks like putting the emulator core in PAL gets rid of the flicker glitch? Does that sound right to you?

The ROM I have is marked "world" so not sure if there were specific NTSC or PAL roms.

DTEAM

@TPR said in Calling Pi 4 Atari Jaguar Fans:

The ROM I have is marked "world" so not sure if there were specific NTSC or PAL roms.

ROM with (World) tag means that game version got released across all regions with exact same data, so it runs in NTSC and PAL modes without Region Lock, although I have never seen a ROM with "(World)" Tag that is PAL optimized in the consoles before Sega Dreamcast.

source: https://www.reddit.com/r/Roms/comments/17ihxy1/what_are_worldwide_roms_vs_ntscpal/?rdt=56874#:~:text=ROM with (World) tag means,the consoles before Sega Dreamcast.

DTEAM

@TPR said in Calling Pi 4 Atari Jaguar Fans:

Just messing around with lr-vjag last night and it does appear that some games are running amazing! One question... I noticed that Tempest will throw odd glitches here and there...

No glitch on my side with lr-vjag. I'm running tempst2k.zip (from MAME Romset) with the default settings and Vulkan