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

emulation number 9 reports that Emulator2001, the Emerson Arcadia 2001 emulator (as well as many other systems) for Microsoft Windows, has been updated. Below are the changes in this release.

- Console buttons moved to top of window

- Reduced CPU cycles per frame and small tweaks to graphics emulation increasing the max frames per second.

- Added save game state and warp speed icons to top of window.

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