Atari7800x Xbox

	Atari7800x
General
Author(s)	xport/Madmab
Type	Console
Version	v6b09
Licence	Mixed
Links
	Download
	Website

What's New

Atari7800x Atari 7800 Emulator port for XBox v6b09

Interface now version cfv1b17.

Atari7800x Atari 7800 Emulator port for XBox v6b08

Interface now version cfv1b14.

Atari7800x Atari 7800 Emulator port for XBox v6b07

Interface now version cfv1b10.

Because rewind is broken with the new DMA code I Added "Global Emu Configuration Override" option "Use Old DMA Code (Enable Rewind) - Yes/No". Set to Yes to be able to use rewind, however some games will be affected graphically ( Centipede ) or will not work right ( One On One ). Set back to "No" if you want those games to work correctly.

Added "Global Emu Configuration Override" option "Disable High Score Cart - Yes/No". This will allow you to play games that don't work when it is presnet (Crazy Brix).

Atari7800x Atari 7800 Emulator port for XBox v6b06

Interface now version cfv1b08.

Reversed the emulated A7800 buttons. They were backwards (See Midnight Mutants as proof).

The difficulty switches default to Easy now.

Updated to the latest mame 0.153 source.. this fixes the previous issues from A7800x v6b04 as listed below

Dig Dug = Line under score display. (fixed) Xevious = Line below score display. (fixed) Rampage = Black line under score. (fixed) Plutos = Glitching line at bottom of score display. (fixed) Hat Trick = (fixed) Midnight Mutants = White line at bottom of playfied. (fixed) Planet Smashers = Improved difficulty selection text but still corrupted (fixed) Double Dragon = Corrupted scanline in score display still there but moved up. (fixed) Commando = Corrupted text improved but still there. (fixed) (slight glitch near top of screen when scrolling)

New configuration option added "Allow Cycle Stealing". Set this to "Yes" for games that need it. Otherwise leave it off. Games that need this are Ace Of Aces, Basketbrawl, Choplifter, Commando, Dig Dug, Double Dragon, Gato (proto), Hat Trick, Klax, Midnight Mutants, One On One, Planet Smashers, Plutos, Xevious

One on One now plays at the proper speed (no fast shot timer).

Diagnostic Test Cart, Multilockon (demo) and Softcell (demo) now run.

ROMS DemoX and Xmas 2012 now work. They may have already worked in v6b04. I just did not check.

Rom hash is now displayed in the IGM synopsis display as well as the "already in database" popup for your reference.

Finally linked the volume control to A7800 (MESS). You can now adjust the sound volume for games.

Fixed two hash calculation bugs in the Prosystem_DB_Load code on games without headers (doh!).

Fixed another bug(TM) with Prosystem_DB_Load where region type was being set incorrectly for games not found in the DB.

Fixed a bug with save2ProsysDB (it was storing the wrong cartridge type) (double doh!)

Fixed another bug(TM) with save2ProsysDB that was picking the wrong cart type on carts that use the pokey chip.

All incorrect hashes in the prosystem.dat file should be correct now. :)

Changes from the 0.153 changelog for those interested.

-a7800.c - Support for >128k cart formats and banked RAM and added bit 4 & bit 5 notes while standardizing 'super' description listing. [Mike Saarna]

-a7800.c: Fixed DMA regarding startup, shutdown and cycle stealing which fixes numerous recorded MAMETester bugs. Bug fixed and fine tuned the DMA timing. Corrected RIOT timing [Mike Saarna]

-a7800.c: [Mike Saarna]

- Fixed number of scanlines to accurately reflect hardware testing and schematics (262-->263 NTSC and 312-->313 PAL).
- Additional fix to timing of Maria cycles and comments.
- Fixed INPTCTRL register implementation to match hardware. Diagnostic Test Cart now works.
- Corrected ROM_FILL.

- Proper calibration per Diagnostic cart [Mike Saarna]
- PAL RIOT fixed. [Mike Saarna]
- Corrected SYNC timing to match later GCC tech doc and measurements against real hw [Mike Saarna]
- Fix to bug that causes skip to first DLL if its 1 scanline tall. [Mike Saarna]
- Fixed total horiz pixels to better match hw testing results and tech docs.  Fixed rendering to ensure DMA stolen cycles. [Mike Saarna]
- Fixes reading of controller port behavior when held high by RIOT chip [Mike Saarna]
- Normalize horizontal frequency while maintaining same net cycles. [Robert Tuccitto]
- Fixed a few remaining issues while keeping to documented tech specs and ranges. [Mike Saarna/Robert Tuccitto]
- Correct fix to Maria cycles regarding DMA Shutdown short/other line shutdown. [Mike Saarna/Robert Tuccitto]

Issues

- Crazy Brix crashes when it reaches the high score screen.

- Choplifter has a slight glitch in the horizon when the copter is on the ground.

- Commando has a slight glitch near top of screen when scrolling.

- Looks like Sentinel included with the RX Xtras is broke. However there is a "PAL" image out there that works fine.

- Rewind does not work with the new DMA code.

Atari7800x Atari 7800 Emulator port for XBox v6b04

important-> Make sure you copy the included Prosystem.dat over any existing one you have on your xbox.

Updated to the latest madmab edition interface

Random sounds in Beef Drop has been fixed.

Xboard support added so "Bentley Bear - Crystal Quest" and "Donkey Kong XM" are playable!

Updated to use the new Maria Line Ram Buffer code. With the following benefits..

Kung-Fu Master = In-game/display graphic corruptions fixed. Pole Position II = Horizon/road fixed. Alien Brigade = Title Screen Text corruption fixed. Centipede = In-Game top box line corruption fixed. One-On-One Basketball = Floor/Wall line corruption fixed. (Game still runs too fast). Midnight Mutants = Top Box/Graphic Corruptions fixed. Xenophobe = Playable. Flickering Fixed.

And the following downsides.

Dig Dug = Line under score display (fixed by auto using old Line Ram Buffer code) Xevious = Line below score display (fixed by auto using old Line Ram Buffer code) Rampage = Black line under score Plutos = Glitching line at bottom of score display Hat Trick = Grey line at top of playfield Midnight Mutants = White line at bottom of playfied Planet Smashers = Improved difficulty selection text but still corrupted Double Dragon = Corrupted scanline in score display still there but moved up. Commando = Corrupted text improved but still there.

Added in the new NTSC Phase shift palettes. So now the Palette options are "MESS-NTSC", "26.7 PHASE SHIFT (default)", "27.7 PHASE SHIFT", and "25.7 PHASE SHIFT". MESS NTSC is the default.

Starting Difficulty switches are now selectable on a per game basis. This is important for alot of homebrew games by PacmanPlus as well as Tower Toppler (be sure to set right difficulty to hard).

Memory is real tight with the new changes so be careful about which skin / background mp3's you use.

Issues
- Crazy Bricks crashes when it reaches the high score screen.