TASEmulators / TASEmulators/BizHawk

CPCHawk accuracy problems megathread

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Core: Future core Inaccuracy Repro: Affects 2.9.1
Dominant language
C#
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Description

  • Gryzor (1987)(Ocean): Visual and Sound Issues

Gryzor

Has some color and palette issues on the initial start menu where you can view colors rapidly changing. Also during that screen the sound is static noise. Also in gameplay there is unusual flickering occurring.

Un-emulated Gryzor on Original hardware
https://www.youtube.com/watch?v=sNA0NOz-rJc

Unlisted Youtube Link showing the Bizhawk Amstrad CPC core issue
https://www.youtube.com/watch?v=JPoyF-fy5Sk&feature=youtu.be&ab_channel=CoolHandMike

Test file for Bizhawk 2.9.1. Normal playing.
https://tasvideos.org/UserFiles/Info/638408082422448233

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the CPCHawk core and reproduce Gryzor using the linked BizHawk 2.9.1 test file. Compare the start-menu palette changes, sound, and gameplay flickering with the linked original-hardware and BizHawk videos. Done means these reported accuracy problems are identified and corrected to match the original hardware.

Written by the indexing model from the issue text.

Assessment

Tech stack
csharp
Domain
game-dev
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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