Viewing Issue Advanced Details
ID Category [?] Severity [?] Reproducibility Date Submitted Last Update
06892 Graphics Minor Always 18 days ago 5 days ago
Tester ICEknight View Status Public Platform MAME (Official Binary)
Assigned To Resolution Open OS Windows 10 (64-bit)
Status [?] Acknowledged Driver
Version 0.194 Fixed in Version Build 64-bit
Summary MESS-specific 06892: megadriv.cpp, sms.cpp, segapico.cpp and related: Display is cropped
Description MAME isn't rendering the full output of the Mega Drive and crops the borders that can be seen on real hardware (and other emulators such as Exodus or BlastEm).

Attached is a comparison of the border-less MAME output and BlastEm's more accurate display with the full borders changing colors mid-screen.

Said borders are also present in the Master System, Game Gear (when connected to a TV through official means:, Pico (seen here:
) and other related hardware such as the SEGA Radica systems (seen here:
Steps To Reproduce Most games (such as Sonic The Hedgehog) will show a colored border right at the title screen.
Additional Information MAME already renders the full display area with borders for computer emulation (fmtowns.cpp, amstrad.cpp), but other consoles and arcade systems may be sharing this problem as well.
Flags Verified with Original
Regression Version
Affected Sets / Systems megadriv.cpp, sms.cpp, segapico.cpp and related
Attached Files
png file icon sonic2 mame blastem.png (61,445 bytes) 18 days ago Uploaded by ICEknight
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Senior Tester
16 days ago
I guess it should be an option at least, the problem is most people consider the borders being present to be a bug, so we probably need to cater for both.
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14 days ago
Perhaps an adjustable "Crop overscan" option would make those people happy and also "fix" #06878 (and other similar Neo Geo "issues") in the process.
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5 days ago
Dullaron has just pointed out at MAMEWorld ( that VS Excitebike is missing a colored border at the bottom. so this may also extend to other NES-based hardware as well.

(close up at 2:10:35)