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グラフィック認証済み未処理2017-10-10 11:102017-10-12 19:21
 
テスターMrGW担当者 ソースcoco3.cpp
バージョン0.190発生バージョン修正バージョン
フラグ
セット coco3 [megabug]
セット詳細
coco3 - Color Computer 3 (NTSC)
 
概 要MegaBugがCoco3ドライバを使うと表示が変になる。
詳 細William Schaub discovered a graphic corruption issue when playing MegaBug on the Coco 3. It loads as a "split screen" where the top half is the entire game with slight corruption at the very bottom. The bottom half is a duplicate copy of the top half with the exception that the bottom half screen will change back and forth from a copy of the top half to complete graphic corruption. This happens whether you are moving your player character or not.

This behavior is exhibited when loading the game as a CART, DSK image or CASSETTE image.

The game works correctly when using the Coco 2 drivers.
再現手順Start MAME with the following command line:

mame coco3 -nomouse -window -debug

Insert the Megabug rompak (CART) using MAME's built-in UI.
追加情報William was able to find a workaround (with a rather interesting palette) by entering b@ff22=CD in the debugger window.

The same issue happens when trying this on the official MAME binary for Windows (William has Windows v8.1).
 
添付ファイルjpg filemegabug-issue.jpg (2017-10-10 11:10)