index2.asm

完整的方案

GetInsPlayIndex:
         R1=0
         [_FileOk]=R1
GetInsPlayIndex0:
         R1=[_InsertFileIndex]
         CMP R1,[_InsertFileNumber]
         JB GetInsPlayIndex_
         PC=GetInsPlayIndexFinish
GetInsPlayIndex_:
         R2=R1 LSL 1
         R1+=R2
         R3=[_InsertPlayAddr]
         R4=[_InsertPlayBank]
         CALL NandAddrAdd
         R5=3
         R2=_NandBuf
         CALL ReadNandByteBuf
         R1=[_NandBuf+0]
         [FileFlag]=R1
         R1=[_NandBuf+1]
         [FileSeriousL]=R1
         R1=[_NandBuf+2]
         [FileSeriousH]=R1
         R1=R1 LSL 4
         R1=R1 LSL 4
         R1|=[FileSeriousL]
         [FileSerious]=R1
         R1=[FileFlag]
         TEST R1, Bit7
         JNE GetInsPlayIndexSpecial
GetInsPlayIndexNormal:
         R1=[_FileOk]
         CMP R1, 0
         JNE GetInsPlayIndexWithSound

         R1=[_InsertFileIndex]
         R1+=1
         [_InsertFileIndex]=R1

         R1=[FileFlag]
         TEST R1,0x0f
         JE GetInsPlayIndexNormal_
         R1&=0x0f
         CMP R1,[_PlayMode]
         JNE GetInsPlayIndexNormalCir
GetInsPlayIndexNormal_:
         R1=1
         [_FileOk]=R1
         R1=[FileSerious]
         [_Index]=R1
GetInsPlayIndexNormalCir:
         PC=GetInsPlayIndex0

GetInsPlayIndexFinish:
         R1=0
         [_InsMode]=R1
GetInsPlayIndexOk:
         R1=[_FileOk]
         CMP R1, 0
         JNE GetInsPlayIndexWithSound
GetInsPlayIndexNoSound:
         DATAOUT
         R1=0
         RETF
GetInsPlayIndexWithSound:
         R1=[_PrevDelayTime]
         JE GetInsPlayIndexWithDirectSound
         R1=[_SysFlagA]                    // sound with delay
         R1|=PlayIndexBit
         [_SysFlagA]=R1
         DATAOUT
         R1=0
         RETF
GetInsPlayIndexWithDirectSound:
         DATAOUT
         R1=1                              // sound for direct play
         RETF

GetInsPlayIndexSpecial:
         R3=[_InsertFileIndex]
         R3+=1
         [_InsertFileIndex]=R3
         CMP R1, dInsFSUnitOff
         JNE GetInsPlayIndexSpecial1
         JMP InsFSUnitOff
GetInsPlayIndexSpecial1:
         CMP R1, dInsFSStop
         JNE GetInsPlayIndexSpecial2
         JMP InsFSStop
GetInsPlayIndexSpecial2:
         CMP R1, dInsFSPrevDelay
         JNE GetInsPlayIndexSpecial3
         JMP InsFSPrevDelay
GetInsPlayIndexSpecial3:
         CMP R1, dInsFSContinue
         JNE GetInsPlayIndexSpecial4
         JMP InsFSPrevContinue
GetInsPlayIndexSpecial4:
         PC=GetInsPlayIndex0
//===============================================
InsFSUnitOff:
         R1=[_FileOk]
         CMP R1, 0
         JNE InsFSUnitOff_
         PC=FSTurnOffUnit
InsFSUnitOff_:
         R3=[_InsertFileIndex]
         R3-=1
         [_InsertFileIndex]=R3
         PC=GetInsPlayIndexWithSound
//===============================================
InsFSStop:
         R1=[_FileOk]
         CMP R1, 0
         JE InsFSStop_
         R3=[_InsertFileIndex]
         R3-=1
         [_InsertFileIndex]=R3
InsFSStop_:
         CALL SoundAllStop
         R1=0
         RETF

InsFSPrevDelay:
         CMP R4,0
         JE InsFSPrevDelayEnd
         R1=[FileSeriousL]
         [_PrevDelayTime]=R1
InsFSPrevDelayEnd:
         PC=GetInsPlayIndex0

InsFSPrevContinue:
         PC=GetInsPlayIndex0