YM2413 pinout

Yamaha YM2413 or ??? K-663A: 18-pin 0.3" PDIP (used in Mapper 515). Also used as a cheaper and similar-sounding substitute for the VRC7 in the TNS-HFX4.

        .--\/--.
 GND -- |01  18| <> D1
  D2 <> |02  17| <> D0
  D3 <> |03  16| -- +5V
  D4 <> |04  15| -> RHYTHM OUT
  D5 <> |05  14| -> MELODY OUT
  D6 <> |06  13| <- /RESET
  D7 <> |07  12| <- /CE
 XIN -> |08  11| <- R/W
XOUT <- |09  10| <- A0
        '------'

Sources: [1], [2]