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B151: Select Picture Mode Alternate
Selects picture mode and marks the secondary picture bit. Reached through the standard command table at Table_CommandHandlerLookup_Standard, dispatched by AFE0.
SelectPictureModeAlternate B151 CALL CheckBitAndJump Call CheckBitAndJump to test the flag bit.
B154 LD A,$02 Set the command mode at A024 to 02 and continue at InitialiseWhenFlagged_MarkBitSix.
B156 LD ($A024),A
B159 JR InitialiseWhenFlagged_MarkBitSix
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