Routines
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B8ED: Blank the screen
Used by the routines at 80E5, 8155, B2F1, B3C3 and B451.
B8ED LD HL,$4000 Clear the display file.
B8F0 LD (HL),$00
B8F2 LD DE,$4001
B8F5 LD BC,$1800
B8F8 LDIR
B8FA LD (HL),$46 Fill the attribute buffer with bright yellow on black.
B8FC LD BC,$02FF
B8FF LDIR
B901 RET Return.
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