Family Noraebang Karaoke pinout

Family Noraebang Karaoke: 45 pin card expansion (iNES 2.0 Mapper 515)

            .------.
 CPU R/W <- |23  01| -- GND
     +5V -- |24  02| -- GND
 CPU A7  <- |25  03| -- GND
 CPU A12 <- |26  04|    NC
 CPU A5  <- |27  05| -- +5V
 CPU A6  <- |28  06| -> PRG A18
 CPU A3  <- |29  07| -- GND
 CPU A4  <- |30  08| -> PRG A17
 CPU A1  <- |31  09| -> PRG A20
 CPU A2  <- |32  10| -> PRG A16
 CPU D0  -> |33  11| -> PRG A19
 CPU A0  <- |34  12| -> PRG A15
 CPU D2  -> |35  13| -- VCC
 CPU D1  -> |36  14| -> CPU A13
    GND  -- |37  15| -> PRG A14
    GND  -- |38  16| -> CPU A9
 CPU D3  -> |39  17| -> CPU A8
    GND  -- |40  18| <- /IRQ
 CPU D5  -> |41  19| -> CPU A10
 CPU D4  -> |42  20| -> PRG A21
 CPU D7  -> |43  21| -> M2
 CPU D6  -> |44  22| -> CPU /ROMSEL
CPU A11  <- |45    |
            '------'
             ^   ^----- bottom side (this row is shifted by half of pin width)
             +--------- label side

Source: [1]