Routines
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C3BD: Play this turn's note of the sound effect under way
Used by the routine at NEW_GAME.
Called by the main loop every turn. EFFECT_TIME is how many notes are left, EFFECT which effect. While the count is not zero, this takes one off and plays twelve waves at the pitch found at the effect's address in EFFECT_TABLE plus the count before it was taken: the notes run backwards from the end, and the byte at the effect's address is never played. The same routine as Pentagram's.
EFFECT_NOTE C3BD LD HL,EFFECT_TIME nothing under way: done
C3C0 LD A,(HL)
C3C1 AND A
C3C2 RET Z
C3C3 DEC (HL) one note fewer; keep the count before
C3C4 EX AF,AF'
C3C5 INC HL HL = the effect's notes
C3C6 LD A,(HL)
C3C7 LD BC,EFFECT_TABLE
C3CA CALL TABLE_WORD
C3CD EX AF,AF' twelve waves at the note the count points to
C3CE LD C,A
C3CF LD B,$00
C3D1 ADD HL,BC
C3D2 LD B,(HL)
C3D3 LD C,$0C
C3D5 JP BEEP
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