retroguru.com reports that SquidgeSNES, a new Super NES emulator for the GP2x, has been released. As of this version, the author considers it to be only a technical demo. Below are the release notes and reasons why.

Just in case your wondering what I've been up to 

 

http://www.squidgey.plus.com/squidgesnes.zip

 

Still very basic, but it runs some roms quite well, like Super mario world. To use it you need to unzip the contents to the root of your sd card, and the rom you want to use needs to be called "snes.smc" and be in the same directory. To exit the emulation press the 'start' button.

 

At the moment, it's in 100% C apart from the cpu core, which is in asm (taken from yoyo's little john palm). Once it's usable, I plan to implement more asm and speedups.

 

Note that this is classified as a 'techdemo' - it's not currently playable. The only button that will do anything is 'start', which exits the emulation.

 

Things still to do:

 

Change from my own sdk to Rlyeh's SDK

Implement controls

Implement sound

Improve compatibility

Scaling/centering of image

More speed

File selector

and lots more...

This news originates from GP32x.com Board, and this individual post can be viewed here.

retroguru.com reports that MAME GP2X, the open source GP2x port of MAME (the Multiple Arcade Machine Emulator), has been updated to version 1.3. Below are the changes in this version.

- Improvements in Cyclone compatibility.

- All Neo·Geo games are running perfectly now, but no Metal Slug with activated sound yet due to lack of RAM .

- Some bugs corrected in CPS-1 games (taken from MAME 0.35b2). Knights of the Round is running ok now, King of Dragons does not get locked after first level, Willow have music, you can insert credits to continue the game, etc... Also there are new supported games (0.35b2): ffightu, sf2a, sf2b, sf2e, 3wonders, 3wonderj, kodj, captcomu, captcomj, knightsj, sf2ce, sf2cej, varthj, sf2t, sf2tj.

- Configurable controls, analog controls sensitivity and inverted X and Y axis.

- You can fire now with volume controls in rotated screen mode.

- Relative paths used now in the emulator, you can put the emulator in the folder you want in the SD card.

- Thanks to all paypal donators: gp32x.de, Federico Mazza, Nandove, Videogame Stuff, Denis Evans, Ricardo Cabello, Elías Ballesteros, J.Antonio Serralvo Martín, bagmouse7, Suj, funkyferdy, Gieese, Vincent Cleaver, William Burnett, Bleeg, Martin Dolphin, Ilarri, Glen Stones, Dr.Konami, Augusto Carlos Pérez Arriaza, Charles Box, Borochi, Kayday, George Tavoulareas, Timofonic, Fabrice Canava, Redox, Javitotrader, remowilliams, Scott Contrera, Jinhyun Seo, Hardcore Gamer (Chapas H-G), Craigx (gp2x.co.uk), Shane Monroe.

You can visit the official homepage here, or simply download it here.

Bryan McPahil, a MAMEdev, has recently updated his wip page.

Double Dragon has a crash which sometimes occurs at the very end of the game (right before the final animation sequence). It occurs because of a jump look up table:

 

BAD3: LDY  #$BADD

BAD7: JSR  [A,Y]

 

At the point of the crash A is 0x3e which causes a jump to 0x3401 (background tile ram) which obviously doesn't contain proper code and causes a crash. The jump table has 32 entries, and only the last contains an invalid jump vector. A is set to 0x3e as a result of code at 0x625f - it reads from the shared spriteram (0x2049 in main cpu memory space), copies the value to 0x523 (main ram) where it is later fetched and shifted to make 0x3e.

 

So.. it's not clear where the error is - the 0x1f value is actually written to shared RAM by the main CPU - perhaps the MCU should modify it before the main CPU reads it back? Perhaps 0x1f should never be written at all? If you want to trace this further please submit a proper fix! In the meantime I have patched the error by making sure the invalid jump is never taken - this fixes the crash (see ddragon_spriteram_r).

 

Double Dragon

Visit his Homepage to see a screen shot of Double dragon and to download a patch for 103u1.

Credits: Mameworld

Yes it's back!

(January 8, 2006) 

ZetaMAME32 v0.103u1 Updated

Updated to MAME 0.103u1 - MAME32 0.103

ZetaMAME32 v0.103u1 Changed

Added 'Capture Snapshot' feature. (USE_CAPTURE_SNAPSHOT macro)

Shortcut key: [Right shift + F12].

It saves and captures all snapshot of visible screen. (Captured file saved snap or preview/snap folder)

 

Changed source codes of 'Safe Exit' feature. (USE_EMULATION_CLOSE macro)

Force exit key: [shift + ESC], [Alt + F4] or [Close Game] key in Extra Controls setting.

Official Release Build

English build: UI Font included 2 fonts in Advanced tab. (12pt height, 8pt height)

General build: UI Font included 6 fonts in Advanced tab. (12pt, 8pt height, korean, japanese, Simplified and Traditional Chinese fonts)

About included command list files for new style (0.103 or higher)

I'll update English command list files for New style. (but update slow)

Added command list (4 games).

1941 (cps1.c): 1941 - Counter Attack

3wonders (cps1.c): Three Wonders / Wonder 3 (Japan)

captcomm (cps1.c): Captain Commando

cawing (cps1.c): Carrier Air Wing / U.S. Navy (Japan)

>> Get it HERE