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EB20: Check for "right" on Protek Interface
Used by the routine at 65BA.
EB20 LD A,$EF Scan top right of the keyboard.
EB22 IN A,($FE)
EB24 BIT 2,A Return if '8' was not pressed.
EB26 JP NZ,$662B
EB29 JP $65F1 Otherwise move to the "right" routine.
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