This patch completely replaces the original engine, adding performance improvements and new features, as well as missing levels from the Jaguar port.

Changes:

• Includes levels that were omitted from the original release.
• Network support via the Zero Tolerance (aka Technopop) link cable.
• Splitscreen coop and deathmatch modes.
• The Cyberdemon and Spider Mastermind have been re-added to the game.
• New title screen that resembles the Saturn and PlayStation versions.
• The iconic screen melt effect for scene changes.
• Rendering has been spread across both SH2 processors for better speed.
• User input is processed at 30FPS, while game logic runs at 15FPS.
• Low (two pixel modes) 128×144, 128×160, 160×180 and three high detail 224×128, 256×144, 320×180 video modes.
• Anamorphic widescreen support for 16:9 screens.
• Mip-mapping for walls and flats.
• Improved visual fidelity (aka ‘high color’) mode.
• FM Synth soundtrack courtesy of Spoony Bard.
• Selecting between no music, VGM FM music, 32X+, or playing music from attached Sega CD (requires Sega CD in addition to 32X).
• Sound driver that uses the Sega CD hardware to offload sound mixing from the 32X.
• Stereo panning for game sounds.
• Controller hot plugging support.
• Save ram support - keeps track of finished levels, health, armor, weapons and ammo - eight save slots as well as an auto-save at the end of each level.
• Restores sprite directions from the Jaguar version as well as in-fighting between monsters.
• A new port of “Slough of Despair” and level fixes courtesy of Wavy.
• Spectres look the way they did in the original PC version.
• Jaguar Doom HUD assets.
• Three drawing modes: the regular sector based lighting (although it’s better than the original Doom 32X in that sprites also use this lighting, no more 100% bright sprites!), “potato” mode which doesn’t texture floors or ceilings for slightly better speed, or the original Doom fading light rendering (which is just a smidgen slower and looks a little muddy given the fifteen bit palette of the 32X).
• ‘Always run’ option.
• Anti-aliased automap with smooth scaling.
• Support for three-button and six-button pads, as well as the Sega mouse. You can choose how to map the primary three buttons in the menu.
• Verified as working on Kega Fusion 3.64, a Model 2 Genesis + Model 2 CD + launch 32X, a CDX + 32X, with a NeoFlash NeoMyth MD and the V1 Mega EverDrive, and also with Mega EverDrive Pro and MegaSD.
• Support for 32X+ (CDDA tracks from CUE files) on the MegaSD flashcart.
• Kill, item and secret counters on the automap.
• “Skinface” intermission screen background.
• Multi-region, supports both PAL and NTSC.

Changes in v3.1:

• Fixed sound initialization in RetroArch
• Fixed save RAM support on the MegaSD and some early Mega EverDrive models
• Fixed music on Refinery not looping properly
• Increased music playback speed by about 5%
• Changed sky texture on the “Tower of Babel” to match the original
• Slightly sped up the melting screen effect on PAL systems
• Music driver now precaches the entire VGM file in SegaCD word ram to reduce bus contention

Changes in v3.0a:

• Fixed issue that prevented the game from launching on the MegaSD
• Fixed the automap

Changes in v3.0:

• Added the iconic screen melt effect for scene changes
• Added both the Cyberdemon and Spider MasterMind bosses along with their respective maps
• Introduced mip-mapping for walls and flats. This is enabled when the highest details setting in the menu is selected
• The game now requires ROM bank switching support by flashcarts and emulators. Please note that degrees of compatibility across flashcarts and emulators may vary!
• [BETA] New sound driver that uses the Sega CD hardware to offload sound mixing from the 32X. This results in the game receiving an additional performance boost
• The number of onscreen sprites has been increased from 60 to 128
• Maps that have been superseded with CD and SMM encounters have been designated as secret levels
• Introduced a new Help screen to the main menu, which outlines the basic controls
• Added “cyberdemonspecial” and “spider mastermind special” DMAPINFO properties
• The menu cursor now has the same response time in both PAL and NTSC
• The intermission screen now also displays level completion time (in virtual NTSC time!)
• Greatly optimized PWM sound mixer
• Reduced the maximum number of simultaneously played sound effects to 6
• Decoupled stereo sound spatialization rate from PWM mixer, set it to 15Hz
• Changed Doomguy’s face turning logic in the statusbar to more closely mimic the original game
• Bugfix: normal doors played the fast door sound upon closing
• Bugfix: weapon position was slightly off center in widescreen mode
• Fixed items not respawning properly in deathmatch
• Added support for sector type 17 (random flicker)
• Monsters can now use teleporters
• The ROM header now lists Sega CD and Sega Mouse as supported devices
• Various optimizations across the code

Changes in v2.2b:

• A re-upload as something went wrong during the build process for v2.2a.

Changes in v2.2a:

• Fixed weapon position being off-center at some screen resolutions.

Changes in v2.2:

• New exclusive port of the original map “Slough of Despair” (MAP18) by Wavy.
• Ported the “skinface” intermission background from the original game.
• Added support for playback of uncompressed 8-bit and IMA ADPCM-compressed 4-bit WAV files.
• The ZGM music file format has been upgraded to support PCM samples (reserved for future use) and is now part of SGDK’s XGM toolset.
• Fixed bug in the sound mixer which resulted in stereo channels being swapped around occasionally.
• Added CD/32X+ volume slider to the audio menu.
• Tweaked MegaSD detection timeout - fixes compatibility issues with MD+ on the MegaEverdrive Pro.
• The status bar now displays the “mowdown” face upon taking damage from environmental hazards.
• The 252 pixels-wide screen mode has been widened to 256 pixels.
• Fixed spectre’s position being off on the finale screen.
• The punch impact sound has been re-added to the game.
• A different tile is now used for the final text briefing background.
• Improved framerate in the menus.
• Added 100% completion color indication to the kills/items/secret counters on the automap.

SOURCE CODE

https://github.com/viciious/d32xr/

CREDITS

Resurrection

• Programming: Victor Luchits, Joseph Fenton
• Music: Spoony Bard https://www.youtube.com/c/spoonybard13
• Mapping: Wavy
• Additional support: MatteusBeus, TrekkiesUnite118, Barone

Calico DOOM

• Programming and reverse engineering: James Haley
• Additional code: Samuel Villarreal, Rebecca Heineman

Special thanks

• id Software
• Songbird Productions
• RetroRGB

• Database match: Doom (Europe)
• Database: No-Intro: Genesis (v. 20210226-213851)
• File/ROM SHA-1: 4EC03C2114EBFFBBCD16859583340D4EA4CD8DD5
• File/ROM CRC32: 53734E3A