Routines
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7A0C: Place a telephone call
Used by the routine at 77D3. On entry, A holds the identifier of the telephone that Sam is calling.
Input
A Telephone identifier
H 0x7F
7A0C LD L,$9A Store the identifier of the telephone that Sam is calling at 7F9A
7A0E LD (HL),A
7A0F INC L Set bit 5 of the telephone status flags at 7F9B
7A10 LD (HL),$20
7A12 LD A,$31 Message 0x31: 'IT BEGAN RINGING'
7A14 JP $75CA Queue this message urgently
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