| ID | Category [?] | Severity [?] | Reproducibility | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 09233 | Graphics | Minor | Always | Aug 6, 2025, 12:20 | Aug 6, 2025, 17:15 |
| Tester | ICEknight | View Status | Public | Platform | MAME (Official Binary) |
| Assigned To | Resolution | Open | OS | Windows 11/10 (64-bit) | |
| Status [?] | Acknowledged | Driver | |||
| Version | 0.279 | Fixed in Version | Build | 64-bit | |
| Fixed in Git Commit | Github Pull Request # | ||||
| Summary | 09233: nes [mmansion and clones]: Grey blocks on black background in Maniac Mansion's intro | ||||
| Description |
While real hardware shows a uniformly black background in the game's intro, MAME (and many old emulators) display some grey blocks around the tree, as well as a grey frame. Might be related to this: https://forums.nesdev.org/viewtopic.php?p=160669&sid=d79f6d86ee68ff69e1dae888f70083a2#p160669 Apparently, the dark grey $1D without color emphasis should look identical to $0F, which is the "canonical" black color, but they may also not be 100% black since the very rarely used $0D (around the words "Maniac Mansion" in the title screen, mouths of Red Slimes in Dragon Warrior, maze outlines in the score tally of Pac-Man Championship Edition) should look darker than them, displaying a true pitch black color. |
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| Steps To Reproduce | Load the game and wait for the intro to happen. | ||||
| Additional Information |
Perhaps MAME's implementation was based on the "old measurements" here? https://www.nesdev.org/w/index.php?title=NTSC_video&oldid=21198#Old_measurement The up to date technical info on the NES video output can be found here: - https://www.nesdev.org/wiki/NTSC_video - https://www.nesdev.org/wiki/PAL_video |
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| Github Commit | |||||
| Flags | Verified with Original | ||||
| Regression Version | |||||
| Affected Sets / Systems | nes [mmansion and clones] | ||||
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Attached Files
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 maniac hardware.png (204,359 bytes) Aug 6, 2025, 12:20 Uploaded by ICEknightManiac Mansion on real hardware
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| maniac mame.png (47,391 bytes) Aug 6, 2025, 12:20 Uploaded by ICEknight Maniac Mansion in MAME
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 demo hardware.jpg (199,736 bytes) Aug 6, 2025, 12:30 Uploaded by ICEknightColor demo on real hardware (with brightness cranked up)
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| demo mame 2.png (50,306 bytes) Aug 6, 2025, 12:30 Uploaded by ICEknight Color demo in MAME (with brightness cranked up)
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| demo mame1.png (43,993 bytes) Aug 6, 2025, 12:31 Uploaded by ICEknight Color demo in MAME (default brightness)
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