227 lines
5.8 KiB
C
227 lines
5.8 KiB
C
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// Init Hardware PCM decoder
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/*
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06a3 0082 0bb8 LRI $R02, #0x0bb8
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06a5 195e LRRI $AC0.M, @$R02
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06a6 2ed1 SRS @SampleFormat, $AC0.M
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06a7 195e LRRI $AC0.M, @$R02
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06a8 2ed4 SRS @ACSAH, $AC0.M
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06a9 195e LRRI $AC0.M, @$R02
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06aa 2ed5 SRS @ACSAL, $AC0.M
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06ab 195e LRRI $AC0.M, @$R02
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06ac 2ed6 SRS @ACEAH, $AC0.M
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06ad 195e LRRI $AC0.M, @$R02
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06ae 2ed7 SRS @ACEAL, $AC0.M
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06af 195e LRRI $AC0.M, @$R02
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06b0 2ed8 SRS @ACCAH, $AC0.M
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06b1 195e LRRI $AC0.M, @$R02
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06b2 2ed9 SRS @ACCAL, $AC0.M
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06b3 195e LRRI $AC0.M, @$R02
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06b4 2ea0 SRS @COEF_A1_0, $AC0.M
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06b5 195e LRRI $AC0.M, @$R02
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06b6 2ea1 SRS @COEF_A2_0, $AC0.M
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06b7 195e LRRI $AC0.M, @$R02
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06b8 2ea2 SRS @COEF_A1_1, $AC0.M
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06b9 195e LRRI $AC0.M, @$R02
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06ba 2ea3 SRS @COEF_A2_1, $AC0.M
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06bb 195e LRRI $AC0.M, @$R02
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06bc 2ea4 SRS @COEF_A1_2, $AC0.M
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06bd 195e LRRI $AC0.M, @$R02
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06be 2ea5 SRS @COEF_A2_2, $AC0.M
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06bf 195e LRRI $AC0.M, @$R02
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06c0 2ea6 SRS @COEF_A1_3, $AC0.M
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06c1 195e LRRI $AC0.M, @$R02
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06c2 2ea7 SRS @COEF_A2_3, $AC0.M
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06c3 195e LRRI $AC0.M, @$R02
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06c4 2ea8 SRS @COEF_A1_4, $AC0.M
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06c5 195e LRRI $AC0.M, @$R02
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06c6 2ea9 SRS @COEF_A2_4, $AC0.M
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06c7 195e LRRI $AC0.M, @$R02
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06c8 2eaa SRS @COEF_A1_5, $AC0.M
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06c9 195e LRRI $AC0.M, @$R02
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06ca 2eab SRS @COEF_A2_5, $AC0.M
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06cb 195e LRRI $AC0.M, @$R02
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06cc 2eac SRS @COEF_A1_6, $AC0.M
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06cd 195e LRRI $AC0.M, @$R02
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06ce 2ead SRS @COEF_A2_6, $AC0.M
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06cf 195e LRRI $AC0.M, @$R02
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06d0 2eae SRS @COEF_A1_7, $AC0.M
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06d1 195e LRRI $AC0.M, @$R02
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06d2 2eaf SRS @COEF_A2_7, $AC0.M
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06d3 195e LRRI $AC0.M, @$R02
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06d4 2ede SRS @GAIN, $AC0.M
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06d5 195e LRRI $AC0.M, @$R02
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06d6 2eda SRS @pred_scale, $AC0.M
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06d7 195e LRRI $AC0.M, @$R02
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06d8 2edb SRS @yn1, $AC0.M
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06d9 195e LRRI $AC0.M, @$R02
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06da 2edc SRS @yn2, $AC0.M
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*/
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/// hmmmmmm
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/*
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06db 8c00 CLR15
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06dc 8a00 M2
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06dd 8e00 S40
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*/
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///
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AX0.L = *0xe16
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AX1.H = ratioHi // sample ratio from AXPBSRC
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AX1.L = ratioLo // sample ratio from AXPBSRC
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AC0 = 0
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AC0.L = currentAddressFrac // AXPBSRC
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*0x0e48 = last_samples[0]
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*0x0e49 = last_samples[1]
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*0x0e4A = last_samples[2]
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*0x0e4B = last_samples[3]
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AC1.M = AX1.L
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ACC = ACC >> 0x05
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AC1 = AC1 + AC0
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R04 = AC1.M
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R05 = AC1.L
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AC1 = AC1 + 0xe0 // ?????? AC1 = AC1 - 2097152 (because 0xe0 is converted to signed and shift << 16)
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AC1 = AC1 >> 16
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AC1 = -AC1
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R06 = -AC1
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//////////////
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AC1 = 0
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AC1.L = R05
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AC1 = AC1 << 2
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R05 = AC1.M
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// 0x06fc
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AX.0 = 0x1fc
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AC0 = 0xe48
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R01 = 0xFFDD
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R03 = 0x0D80
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// 0x0704
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for (i=0; i<R04; i++)
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{
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AC0 = AC0 + AX1
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*R03++ = AC0.M
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AC1.M = AC0.L
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LSR $AC1.M, #0x79
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AC1 = AC1 & AX0.H
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AC1 += AX0.L
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*R03++ = AC1
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*R00++ = *ADPCM_DECODER
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*R00++ = *ADPCM_DECODER
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*R00++ = *ADPCM_DECODER
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*R00++ = *ADPCM_DECODER
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}
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/*
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0704 0064 0715 BLOOP $R04, 0x0715
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0706 1827 LRR $R07, @$R01
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0707 1b07 SRRI @$R00, $R07
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0708 4a00 ADDAX $AC0.M, $AX1.L
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0709 1ffc MRR $AC1.M, $AC0.L
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070a 1827 LRR $R07, @$R01
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070b 1b07 SRRI @$R00, $R07
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070c 1579 LSR $AC1.M, #0x79
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070d 3500 ANDR $AC1.M, $R00
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070e 1827 LRR $R07, @$R01
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070f 1b07 SRRI @$R00, $R07
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0710 4100 ADDR $AC1.M, $AX0.L
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0711 1b7e SRRI @$R03, $AC0.M
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0712 1827 LRR $R07, @$R01
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0713 1b07 SRRI @$R00, $R07
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0714 1b7f SRRI @$R03, $AC1.M
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0715 0000 NOP */
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// 0x0715
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// prolly copies the "rest"
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for (i=0; i<r05; i++)
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{
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R07 = *ADPCM_DECODER
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*R00++ = R07
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}
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// 0x71c
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R03--
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AC1 = *R03
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/* 071c 0007 DAR $R03
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071d 187f LRR $AC1.M, @$R03 */
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for (i<0; i<r06; i++)
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{
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AC0 = AX1
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*R03++ = AC1.M
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}
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/*
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071e 0066 0724 BLOOP $R06, 0x0724
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0720 4a3b ADDAX<EFBFBD>S $AC0.M, $AX1.L : @$R03, $AC1.M
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0721 1ffc MRR $AC1.M, $AC0.L
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0722 1579 LSR $AC1.M, #0x79
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0723 3533 ANDR<EFBFBD>S $AC1.M, $R00 : @$R03, $AC0.M
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0724 4100 ADDR $AC1.M, $AX0.L
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*/
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0725 1b7f SRRI @$R03, $AC1.M
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0726 0004 DAR $R00
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0727 189f LRRD $AC1.M, @$R00
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0728 1adf SRRD @$R02, $AC1.M
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0729 189f LRRD $AC1.M, @$R00
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072a 1adf SRRD @$R02, $AC1.M
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072b 189f LRRD $AC1.M, @$R00
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072c 1adf SRRD @$R02, $AC1.M
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072d 189f LRRD $AC1.M, @$R00
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072e 1adf SRRD @$R02, $AC1.M
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072f 1adc SRRD @$R02, $AC0.L
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0730 0082 0bd2 LRI $R02, #0x0bd2
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0732 27dc LRS $AC1.M, @yn2
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0733 1adf SRRD @$R02, $AC1.M
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0734 27db LRS $AC1.M, @yn1
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0735 1adf SRRD @$R02, $AC1.M
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0736 27da LRS $AC1.M, @pred_scale
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0737 1adf SRRD @$R02, $AC1.M
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0738 0082 0bbe LRI $R02, #0x0bbe
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073a 27d9 LRS $AC1.M, @ACCAL
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073b 1adf SRRD @$R02, $AC1.M
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073c 27d8 LRS $AC1.M, @ACCAH
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073d 1adf SRRD @$R02, $AC1.M
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073e 8f00 S16
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073f 00c1 0e42 LR $R01, @0x0e42
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0741 0082 0d80 LRI $R02, #0x0d80
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0743 1940 LRRI $R00, @$R02
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0744 1943 LRRI $R03, @$R02
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0745 80f0 NX<EFBFBD>LDX : $AX1.L, $AX1.H, @$R01
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0746 b8c0 MULX<EFBFBD>LDX $AX0.H, $AX1.H : $AX0.L, $AX0.H, @$R00
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0747 111f 074f BLOOPI #0x1f, 0x074f
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0749 a6f0 MULXMV<EFBFBD>LDX $AX0.L, $AX1.L, $AC0.M : $AX1.L, $AX1.H, @$R01
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074a bcf0 MULXAC<EFBFBD>LDX $AX0.H, $AX1.H, $AC0.M : $AX1.L, $AX1.H, @$R01
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074b 1940 LRRI $R00, @$R02
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074c 1943 LRRI $R03, @$R02
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074d bcf0 MULXAC<EFBFBD>LDX $AX0.H, $AX1.H, $AC0.M : $AX1.L, $AX1.H, @$R01
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074e 4ec0 ADDP<EFBFBD>LDX $AC0.M : $AX0.L, $AX0.H, @$R00
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074f b831 MULX<EFBFBD>S $AX0.H, $AX1.H : @$R01, $AC0.M
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0750 a6f0 MULXMV<EFBFBD>LDX $AX0.L, $AX1.L, $AC0.M : $AX1.L, $AX1.H, @$R01
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0751 bcf0 MULXAC<EFBFBD>LDX $AX0.H, $AX1.H, $AC0.M : $AX1.L, $AX1.H, @$R01
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0752 bc00 MULXAC $AX0.H, $AX1.H, $AC0.M
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0753 4e00 ADDP $AC0.M
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0754 1b3e SRRI @$R01, $AC0.M
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0755 00e1 0e42 SR @0x0e42, $R01
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0757 02df RET
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