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YM2413 test data

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Mar 23rd, 2019
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  1. YM2413 test data output format(!!not verified on hardware!!).
  2. /CS = 0
  3. /WE = 1
  4. A0 = 0
  5. D0 and D1 serially output test data with internal clock rate
  6. Internal clock rate is MCLK/4
  7. Clock 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
  8. D0: P8 P7 P6 P5 P4 P3 P2 P1 P0 E6 E5 E4 E2 E1 E0 0 0 0
  9. D1: C8 C7 C6 C5 C4 C3 C2 C1 C0 0 0 0 0 0 0 0 0 0
  10.  
  11. Px - Operator 0 phase generator output LSB bits
  12. Ex - Operator 17 envelope generator output
  13. Cx - Channel 6(?) output
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