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75 lines
1.7 KiB
75 lines
1.7 KiB
#IF AUDIOTRACE
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#DEFINE AUDTRACE(STR) PUSH DE \ LD DE, STR \ CALL WRITESTR \ POP DE
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#DEFINE AUDTRACE_A CALL PRTHEXBYTE
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#DEFINE AUDTRACE_B PUSH AF \ LD A, B \ CALL PRTHEXBYTE \ POP AF
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#DEFINE AUDTRACE_D PUSH AF \ LD A, D \ CALL PRTHEXBYTE \ POP AF
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#DEFINE AUDTRACE_E PUSH AF \ LD A, E \ CALL PRTHEXBYTE \ POP AF
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#DEFINE AUDTRACE_L PUSH AF \ LD A, L \ CALL PRTHEXBYTE \ POP AF
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#DEFINE AUDTRACE_HL CALL PRTHEXWORDHL
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#DEFINE AUDTRACE_BC PUSH HL \ PUSH BC \ POP HL \ CALL PRTHEXWORDHL \ POP HL
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#DEFINE AUDTRACE_DE PUSH HL \ PUSH DE \ POP HL \ CALL PRTHEXWORDHL \ POP HL
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#DEFINE AUDTRACE_IY PUSH HL \ PUSH IY \ POP HL \ CALL PRTHEXWORDHL \ POP HL
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#DEFINE AUDDEBUG(S) push hl \ CALL PRTSTRD \ .TEXT S \ .TEXT "$" \ pop hl ; $$$$$$ PRINT STRING S TO CONSOLE - PRTD("HELLO") - NO TRAILING $ REQUIRED
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#DEFINE AUDTRACE_CR AUDDEBUG("\r\n$")
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#ELSE
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#DEFINE AUDTRACE(S)
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#DEFINE AUDTRACE_A
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#DEFINE AUDTRACE_B
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#DEFINE AUDTRACE_D
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#DEFINE AUDTRACE_E
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#DEFINE AUDTRACE_L
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#DEFINE AUDTRACE_BC
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#DEFINE AUDTRACE_HL
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#DEFINE AUDTRACE_DE
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#DEFINE AUDTRACE_IY
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#DEFINE AUDDEBUG(STR)
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#DEFINE AUDTRACE_CR
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#ENDIF
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#IFNDEF AUDIOUTILS
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#DEFINE AUDIOUTILS
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AUD_NOTE:
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AUDDEBUG("AUDNOTE ")
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AUDTRACE_HL
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AUDTRACE_CR
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AUDTRACE_DE
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AUDTRACE_CR
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push de
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LD DE, 48
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CALL DIV16
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; BC IS OCTAVE COUNT
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; HL is NOTE WITIN OCTAVE
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ADD HL, HL
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pop de
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ADD HL, DE
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LD A, (HL) ; RETRIEVE PERIOD COUNT FROM SN7NOTETBL
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INC HL
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LD H, (HL)
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LD L, A
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INC C
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AUD_NOTE1:
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DEC C
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JR Z, AUD_NOTE2
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SRL H
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RR L
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JR AUD_NOTE1
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AUD_NOTE2:
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LD A, L ; IF NOT ZERO
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OR H
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RET NZ ; RETURN THE CALCULATED PERIOD
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LD H, $FF ; OTHERWISE RETURN -1 PERIOD (ERROR)
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LD L, $FF
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RET
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#ENDIF
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