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97D5: Control Code 00: Clear Screen
ControlCode_ClearScreen 97D5 PUSH BC Stash BC and DE on the stack.
97D6 PUSH DE
97D7 LD HL,($F81C) HL=*PrintAttributeBuffer_Pointer.
97DA LD A,($F81E) A=*F81E.
97DD LD BC,$02FF BC=02FF.
97E0 CALL Helper_Copier Call Helper_Copier.
97E3 LD HL,($F82B) HL=*PrintScreenBuffer_Pointer.
97E6 XOR A A=00.
97E7 LD BC,$17FF BC=17FF.
97EA CALL Helper_Copier Call Helper_Copier.
97ED JP $9960 Jump to 9960.
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