Border parameters for the Mobile Home Page in Mobile Trainer (モバイルトレーナー) for Mobile System GB
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Published on ● Video Link: https://www.youtube.com/watch?v=r1xNitydsII
Calling 4E:4000 will load a shell for the Mobile Trainer's Mobile Home Page (everything else will be uninitialised or glitched).
The outcome depends on the value of the accumulator register (a):
00 - Grey background
01 - Blue background
02 - Green background and different shape
(See https://tcrf.net/Notes:Mobile_Trainer )