213 lines
3.4 KiB
C
213 lines
3.4 KiB
C
//
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// Pseudo C
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//
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//
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// DSP:
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//
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// Memory USAGE
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0x0B80 to 0x0C40 CurrentPB
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0x0B87
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0x0E15 SrcSelectFunction // perhaps CMD0 setups some kind of jmp table at this addresses
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0x0E16 CoefFunction
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0x0E14 MixCtrlFunction
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0x0e17 TmpBuffer exceptions
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0x0e18 TmpBuffer exceptions
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0x0e19 TmpBuffer exceptions
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// instrcution memory
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0x0B31 to 0x0B33 some kind of JMP-Table to handle srcSelect ???
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0x0B34 to 0x0B36 some kind of JMP-Table to handle coefSelect ???
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0x0B11 to 0x0B1F some kind of JMP-Table to handle mixerCtrl ???
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void CMD2()
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{
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// 0x1BC
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int_addrPB = (*r00 << 16) | *(r00+1)
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DMA_From_Memory(0x0B80, _addrPB, 0xC0); // read first PB to 0x0B80
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// 0x1C7
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*0x0E08 = 0x0000
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*0x0E09 = 0x0140
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*0x0E0A = 0x0280
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*0x0E0B = 0x0400
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*0x0E0C = 0x0540
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*0x0E0D = 0x0680
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*0x0E0E = 0x07C0
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*0x0E0F = 0x0900
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*0x0E10 = 0x0A40
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// 0x1E4
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WaitForDMATransfer()
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// 0x1E6
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Addr = (*0x0BA7 << 16) | *0x0BA8
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DMA_From_Memory(0x03C0, Addr, 0x80); // Copy Update Data to 0x03C0 (AXPBUPDATE dataHi, dataLo)
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// 0x1F4
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R03 = (*0x0B84) + 0x0B31 // AXPB->srcSelect + 0x0B31 ??? some kind of flag handling ??? SRCSEL can be 0x0 to 0x2
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AC0.M = *R03
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*0x0E15 = *AC0.M
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// 0x1FD
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R03 = (*0x0B85) + 0x0B34 // AXPB->coefSelect + 0x0B34 ??? some kind of flag handling ??? COEF can be 0x0 to 0x2
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AC0.M = *R03
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*0x0E16 = *AC0.M
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// 0x206
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R03 = (*0x0B86) + 0x0B11 // AXPB->mixerCtrl + 0x0B36 ??? some kind of flag handling ??? MIXCTRL can be 0x0 to 0xE
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AC0.M = *R03
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*0x0E14 = *AC0.M
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// 0x20F
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if (*0x0B9B == 0) // AXPBITD->flag (on or off for this voice)
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{
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// jmp to 0x23a
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*0x0E42 = 0x0CE0
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*0x0E40 = 0x0CE0
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*0x0E41 = 0x0CE0
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*0x0E43 = 0x0CE0
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WaitForDMATransfer()
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}
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else
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{
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// code at 0x216
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*0x0E40 = *0x0B9E + 0x0CC0 // AXPBITD->shiftL
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*0x0E41 = *0x0B9F + 0x0CC0 // AXPBITD->shiftR
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*0x0E42 = 0xCE0
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*0x0E43 = 0xCE0
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WaitForDMATransfer()
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// 0x22a
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Addr = (*0x0B9C << 16) | *0x0B9D
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DMA_From_Memory(0x0CC0, Addr, 0x40); // (AXPBITD->bufferHi << 16 | AXPBITD->bufferLo) -> 0xCC0
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WaitForDMATransfer()
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}
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}
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void CMD0()
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{
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}
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void CMD3()
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{
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0x0E07 = R00
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R00 = 0x0BA2 // AXPBUPDATE->updNum
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R01 = 0x03C0
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*0x0E04 = 0x05
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AC1 = 0
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AC0 = 0
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AX0.H = *R00++ // AXPBUPDATE->updNum[0]
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AC1.M = 0x0B80
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// 0x256
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for (i=0; i<AX0.H; i++)
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{
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AC0.M = *R01++
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AC0.M = AC0.M + AC1.M
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AX1.L = *R01++
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R02 = AC0.M
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*R02 = AX1.L
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}
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// 0x25c
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R03 = 0x0E05
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*R03++ = R01
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*R03++ = R02
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// 0x260
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AC0.M = *0x0B87 // AXPB->state
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if (AC0.M == 1)
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{
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// JMP 0x267 (AX_PB_STATE_RUN)
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*0x0E1C = *0x0E42
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CALLR *0x0E15 // Load Sample (SrcSelectFunction)
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// 0x270
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AC0.M = *0xBB3 // AXPBVE->currentDelta (.15 volume at start of frame)
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AC1.M = *0xBB2 // AXPBVE->currentVolume
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// 0x278
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AX0.L = AC1.M
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AC1.M = AC1.M + AC0.M
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AC0.M = AC0.M << 1
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SET15 // ????
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AX1.H = AC0.M
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AC0.M = AX0.L
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AX0.L = 0x8000
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R00 = 0x0E44
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// 0x27f
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// scale volume table
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.
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.
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.
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/* for (int i=0; i<32; i++)
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{
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*R00++ = AC0.M;
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prod = AX0.L * AX1.H
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*R00++ = AC1.M;
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AC0 = AC0 + prod
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prod = AX0.L * AX1.H
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*R00++ = AC0.M;
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AC1 = AC1 + prod
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prod = AX0.L * AX1.H
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}*/
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// 0x29f
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*0xBB2 = CurrentVolume
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// 0x2a1
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// mutiply volume with sample
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.
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.
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.
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// 0x2ea
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// Call mixer
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// 0x02f0
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}
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else
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{
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// JMP 0x332
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.
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.
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.
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.
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}
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}
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// ===============================================================
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void Func_0x065D()
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{
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} |