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ID Category [?] Severity [?] Reproducibility Date Submitted Last Update
08923 Media Support Minor Always 20 days ago 9 days ago
Tester Robbbert View Status Public Platform MAME (Self-compiled)
Assigned To Resolution Invalid report OS Windows 10/11 (64-bit)
Status [?] Closed Driver
Version 0.269 Fixed in Version Build 64-bit
Fixed in Git Commit Github Pull Request #
Summary 08923: gbc: Certain loose software causes the red warning screen to appear instead of the usual yellow screen
Description The loose software game "Robopon" (2 different versions) cause the warning screen to change when starting the console.

It should say:

"Imperfectly emulated features: graphics, sound",

but the Robopon games cause it to instead say:

"Completely unemulated features: sound, communications
Imperfectly emulated features: graphics"

and the screen is red.

The game runs fine - with sound.

Loose software should not change the warning, as far as I know - unless things have changed recently.
Steps To Reproduce Start MAME with the command line (adjusted for the location of your software)

>mame gbc -cart "E:\data\nintendo\gb\ok\Robopon - Star Version (2000)(Atlus)(US)(Proto).gbc"

There's a similar game that also causes the problem

>mame gbc -cart "E:\data\nintendo\gb\ok\Robopon - Sun Version (2000)(Atlus)(US)(Proto)[GBC][SGB].gbc"
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Affected Sets / Systems gbc
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Notes
3
User avatar
No.22342
Robbbert
Senior Tester
20 days ago
Looks like it's normal for that game.
User avatar
No.22359
cuavas
Administrator
9 days ago
Those cartridges contain IR communication hardware and piezo speakers that aren’t emulated (as well as the very incomplete simulation of the 4-bit microcontroller used as a real-time clock).
User avatar
No.22360
cuavas
Administrator
9 days ago
You can play those games, but I wouldn’t say they’re “fine”. Alarms, cooldown periods, etc. that depend on the real-time clock and whatever else it uses the microcontroller for probably don’t work properly, and there’s the missing infrared link feature (marketed as “GB KISS”).