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E7B0: Routine at E7B0
Used by the routines at D2DE and E580.
E7B0 LD A,R L=the contents of the Memory Refresh Register.
E7B2 LD L,A
E7B3 LD H,$01 H=01.
E7B5 LD B,$64 B=64.
E7B7 LD A,(HL) A=*HL.
E7B8 AND %00011000 Keep only bits 3-4.
E7BA OR %00000101 Set bits 0, 2.
E7BC OUT ($FE),A Set border to the colour held by A.
E7BE INC HL Increment HL by one.
E7BF LD A,R A=the contents of the Memory Refresh Register.
E7C1 INC A Increment A by one.
E7C2 RLCA RLCA.
E7C3 LD E,A E=A.
E7C4 DEC E Decrease E by one.
E7C5 JR NZ,$E7C4 Jump to E7C4 until E is equal to 00.
E7C7 DJNZ $E7B7 Decrease counter by one and loop back to E7B7 until counter is zero.
E7C9 RET Return.
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