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readme.md

TWiSTeD bRaIn

aka #noteletext #justrasters

A new demo for the BBC Master by ~ BITSHIFTERS COLLECTIVE ~

Presented at the NOVA 2018 demoparty on 23rd June 2018 in Budleigh Salterton, Devon. This demo will twist the 6845 CRTC video chip in your BBC Master computer. If you experience any glitches or have compatibility problems please report them to us as a GitHub issue. Otherwise, just enjoy the show & let us know what you think!

(We also broke your favourite emulator a little bit, sorry about that! ;)

CREDITS

  • Code & FX by kieranhj
  • Atari ST music by Mad Max
  • Music code & Atari ST port by Henley
  • Artwork by Dethmunk
  • Bitshifters logo by @Horsenburger
  • Font by Razor

CONTACT

INVERSE PHASE is creating authentic chiptunes please offer your support by visiting www.inversephase.com

TOOLS USED

BeebAsm, b-em emulator, jsbeeb emulator Exomizer, Pucrunch, Visual Studio Code GitHub & more

TECHNICAL SUPPORT

This demo requires a standard issue BBC Master 128K computer. Only MOS 3.20 has been tested, other MOS versions may be supported. Let us know!

All 4x sideways RAM banks 4 - 7 must be available for use. If you have ROMs installed internally these may be occupying sideways RAM banks. You will need to remove them and check links LK18 and LK19 are set correcly as per the Master Reference manual.

PAGE must be &1900 or lower. Type "P.~PAGE" in BASIC to check your value. If this is higher than &E00 then you may have a ROM installed that is claiming precious RAM! Try unplugging any non-essential ROMS with *UNPLUG.

Coprocessors and the Tube must be disabled. Type *CONF.NOTUBE and reset.

This demo has been tested on real floppy disc hardware, Retroclinic DataCentre and MAMMFS for MMC devices.