Edit Infobox GB Homebrews: Mango GB

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{{#seo: |title=GameBrew |title_mode=append |image=mangogb.png |image_alt=Mango }} A demo pack made for the GameBoy '98 Demo Competition. It includes several Game Boy demos: *dycp.gb - Different Y Card Position Scroller (Grafix Effect). *dxcp.gb - Different X Card Position Scroller (Grafix Effect). *flex.gb - Flexing Logo (Grafix Effect). *toons.gb - Picture Displays (Grafix Only). *plot.gb (Grafix Effect). *cat.gb - Animation Interaction (Animation). *muzak.gb - Sound demo Game (Music). ==User guide== Brief technical detail about each demo: dycp.gb - A unique scroller not made up of sprites, except for the MANGO logo. It uses a map of 20 character columns and has a sinus table controlling the scroll wave. The scroll has a depth range of 0 to about 60 pixels, with a maximum of 80 pixels on the map. dxcp.gb - An upward scroller with varying X positions on the scroll. It makes use of raster interrupts and register $FF43 on each line for character column scroll. flex.gb - Makes use of magic interrupts and a simple sinus algorithm to create a flex effect. The window is used to display bouncing credits. toons.gb - Displays pictures with on-line credits. cat.gb - Animated cat made up of sprites (3x2) with a simple background scroll. Joy pad routines are used to interact and control the cat's movement. muzak.gb - A sound demo made with a custom music keyboard editor. The editor produced the core music data that works with the music routines written by Matt Fielding. ==Screenshots== https://dlhb.gamebrew.org/gbhomebrews/mangogb2.png https://dlhb.gamebrew.org/gbhomebrews/mangogb3.png https://dlhb.gamebrew.org/gbhomebrews/mangogb4.png https://dlhb.gamebrew.org/gbhomebrews/mangogb5.png ==Compatibility== Demos have been tested only on the VGB-DOS emulator Version 0.8b1 by Marat Fayzullin 1995/96. All demos are 32K in size. ==Credits== *All demos written & coded by John Pericos. *Music Routines for muzak.gb written by Matt Fielding. *Original Animations from Bill William's "AlleyCAT". Software used: *TASM GameBoy Assembler v3.0.1. *Checksum GameBoy Snapshots v1.1 (Jeff Frohwein). *PCX to GameBoy Converter v0.9 (HeroZero). *Paint Shop Pro 4. *GameBoy Music Keyboard v1.01 (John Pericos). *Mouse Plot Pixels v1.01 (John Pericos). *Binary to ASM converter v1.01 (John Pericos). ==External links== *GameBoy '98 Demo Competition - [https://web.archive.org/web/20000831012720/http://digitalparadise.cgocable.ca/GB98/ http://digitalparadise.cgocable.ca/GB98/] (archived) [[Category:GameBoy 98 Demo Competition]]

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