MVS MV-6 daughter board connectors pinouts

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Ongoing Reverse Enginering by Pudrik.

MV6 Daughter Board PCB connectors pinouts:

CN8

Pin Connected to Location
A1 +5V
A2 +5V
A3 +5V
A4 Pin 5 of 74F251 K3
A5 Pin 5 of 74F251 J3
A6 Pin 5 of 74F251 H3
A7 Pin 5 of 74F251 G3
A8 Pin 5 of 74F251 G1
A9 Pin 5 of 74F251 F2
A10 NC?
A11 Pin 1 of 74LS245 B5, B9, B13, B27, B21, B25
A12 NC?
A13 NC?
A14 Pin 8 of 74LS244 A4, A8, A12, A16, A20, A24
A15 Pin 6 of 74LS244 A4, A8, A12, A16, A20, A24
A16 Pin 4 of 74LS244 A4, A8, A12, A16, A20, A24
A17 Pin 2 of 74LS244 A4, A8, A12, A16, A20, A24
A18 Pin 11 of 74LS244 A4, A8, A12, A16, A20, A24
A19 Pin 13 of 74LS244 A4, A8, A12, A16, A20, A24
A20 Pin 15 of 74LS244 A4, A8, A12, A16, A20, A24
A21 Pin 17 of 74LS244 A4, A8, A12, A16, A20, A24
A22 Pin 8 of 74LS244 B4, B8, B12, B16, B20, B24
A23 Pin 6 of 74LS244 B4, B8, B12, B16, B20, B24
A24 Pin 4 of 74LS244 B4, B8, B12, B16, B20, B24
A25 Pin 2 of 74LS244 B4, B8, B12, B16, B20, B24
A26 Pin 11 of 74LS244 B4, B8, B12, B16, B20, B24
A27 Pin 13 of 74LS244 B4, B8, B12, B16, B20, B24
A28 Pin 15 of 74LS244 B4, B8, B12, B16, B20, B24
A29 Pin 17 of 74LS244 B4, B8, B12, B16, B20, B24
A30 GND
A31 GND
A32 GND
 
B1 +5V
B2 +5V
B3 +5V
B4 Pin 5 of 74F251 K2
B5 Pin 5 of 74F251 J2
B6 Pin 5 of 74F251 H2
B7 Pin 5 of 74F251 G2
B8 Pin 5 of 74F251 F3
B9 Pin 5 of 74F251 F1
B10 Pin 5 of 74F251 E3
B11 Pin 5 of 74F251 E2
B12 Pin 5 of 74F251 D3
B13 Pin 5 of 74F251 D2
B14 Pin 5 of 74F251 D1
B15 Pin 5 of 74F251 C3
B16 Pin 5 of 74F251 C2
B17 Pin 5 of 74F251 C1
B18 Pin 8 of 74LS244 A5, A9, A13, A17, A21, A25
B19 Pin 6 of 74LS244 A5, A9, A13, A17, A21, A25
B20 Pin 4 of 74LS244 A5, A9, A13, A17, A21, A25
B21 Pin 2 of 74LS244 A5, A9, A13, A17, A21, A25
B22 Pin 9 of 74LS245 B5, B9, B13, B27, B21, B25
B23 Pin 8 of 74LS245 B5, B9, B13, B27, B21, B25
B24 Pin 7 of 74LS245 B5, B9, B13, B27, B21, B25
B25 Pin 6 of 74LS245 B5, B9, B13, B27, B21, B25
B26 Pin 5 of 74LS245 B5, B9, B13, B27, B21, B25
B27 Pin 4 of 74LS245 B5, B9, B13, B27, B21, B25
B28 Pin 3 of 74LS245 B5, B9, B13, B27, B21, B25
B29 Pin 2 of 74LS245 B5, B9, B13, B27, B21, B25
B30 GND
B31 GND
B32 GND

The ICs:

  • A4, A8, A12, A16, A20, A24 = 74LS244
  • A5, A9, A13, A17, A21, A25 = 74LS244
  • B4, B8, B12, B16, B20, B24 = 74LS244
  • B5, B9, B13, B27, B21, B25 = 74LS245
  • C1, C2, C3 = 74F251
  • D1, D2, D3 = 74F251
  • E2, E3 = 74F251
  • F1, F2, F3 = 74F251
  • G1, G2, G3 = 74F251
  • H2, H3 = 74F251
  • J2, J3 = 74F251
  • K2, K3 = 74F251

CN9

Pin Connected to Location
A1 +5V
A2 +5V
A3 +5V
A4 Pin 8 of 74LS244 L4, L8, L12, L16, L20, L24
A5 Pin 6 of 74LS244 L4, L8, L12, L16, L20, L24
A6 Pin 4 of 74LS244 L4, L8, L12, L16, L20, L24
A7 Pin 2 of 74LS244 L4, L8, L12, L16, L20, L24
A8 Pin 11 of 74LS244 L4, L8, L12, L16, L20, L24
A9 Pin 13 of 74LS244 L4, L8, L12, L16, L20, L24
A10 Pin 15 of 74LS244 L4, L8, L12, L16, L20, L24
A11 Pin 17 of 74LS244 L4, L8, L12, L16, L20, L24
A12 Pin 8 of 74LS244 M4, M8, M12, M16, M20, M24
A13 Pin 6 of 74LS244 M4, M8, M12, M16, M20, M24
A14 Pin 4 of 74LS244 M4, M8, M12, M16, M20, M24
A15 Pin 2 of 74LS244 M4, M8, M12, M16, M20, M24
A16 Pin 11 of 74LS244 M4, M8, M12, M16, M20, M24
A17 Pin 13 of 74LS244 M4, M8, M12, M16, M20, M24
A18 Pin 15 of 74LS244 M4, M8, M12, M16, M20, M24
A19 Pin 17 of 74LS244 M4, M8, M12, M16, M20, M24
A20 Pin 5 of 74F251 K28
A21 Pin 5 of 74F251 K30
A22 Pin 5 of 74F251 J29
A23 Pin 5 of 74F251 H28
A24 Pin 5 of 74F251 H30
A25 Pin 5 of 74F251 G29
A26 Pin 5 of 74F251 F28
A27 Pin 5 of 74F251 F30
A28 Pin 5 of 74F251 E29
A29 Pin 5 of 74F251 D28
A30 Pin 5 + Pin 8 of 74F138 C28
A31 GND
A32 GND
 
B1 +5V
B2 +5V
B3 +5V
B4 Pin 8 of 74LS244 L5, L9, L13, L17, L21, L25
B5 Pin 6 of 74LS244 L5, L9, L13, L17, L21, L25
B6 Pin 4 of 74LS244 L5, L9, L13, L17, L21, L25
B7 Pin 2 of 74LS244 L5, L9, L13, L17, L21, L25
B8 Pin 17 of 74LS244 L5, L9, L13, L17, L21, L25
B9 Pin 15 of 74LS244 L5, L9, L13, L17, L21, L25
B10 Pin 13 of 74LS244 L5, L9, L13, L17, L21, L25
B11 Pin 11 of 74LS244 L5, L9, L13, L17, L21, L25
B12 Pin 8 of 74LS244 N5, N9, N13, N17, N21, N25
B13 Pin 6 of 74LS244 N5, N9, N13, N17, N21, N25
B14 Pin 4 of 74LS244 N5, N9, N13, N17, N21, N25
B15 Pin 2 of 74LS244 N5, N9, N13, N17, N21, N25
B16 Pin 17 of 74LS244 N5, N9, N13, N17, N21, N25
B17 Pin 15 of 74LS244 N5, N9, N13, N17, N21, N25
B18 Pin 13 of 74LS244 N5, N9, N13, N17, N21, N25
B19 Pin 11 of 74LS244 N5, N9, N13, N17, N21, N25
B20 Pin 5 of 74F251 K29
B21 Pin 5 of 74F251 J28
B22 Pin 5 of 74F251 J30
B23 Pin 5 of 74F251 H29
B24 Pin 5 of 74F251 G28
B25 Pin 5 of 74F251 G30
B26 Pin 5 of 74F251 F29
B27 Pin 5 of 74F251 E28
B28 Pin 5 of 74F251 E30
B29 Pin 5 of 74F251 D29
B30 GND
B31 GND
B32 GND

The ICs:

  • C28 = 74F138
  • D28, D29 = 74F251
  • E28, E29, E30 = 74F251
  • F28, F29, F30 = 74F251
  • G28, G29, G30 = 74F251
  • H28, H29, H30 = 74F251
  • J28, J29, J30 = 74F251
  • K28, K29, K30 = 74F251
  • L4, L8, L12, L16, L20, L24 = 74LS244
  • L5, L9, L13, L17, L21, L25 = 74LS244
  • M4, M8, M12, M16, M20, M24 = 74LS244
  • N5, N9, N13, N17, N21, N25 = 74LS244

CN10

Pin Connected to Location
A1 +5V
A2 +5V
A3 +5V
A4 +5V
A5 Pin 11 of 74LS245 + Pin 14 of 74F174 L6, L10, L14, L18, L22, L26, C29
A6 Pin 12 of 74LS245 + Pin 13 of 74F174 L6, L10, L14, L18, L22, L26, C29
A7 Pin 13 of 74LS245 + Pin 11 of 74F174 L6, L10, L14, L18, L22, L26, C29
A8 Pin 14 of 74LS245 L6, L10, L14, L18, L22, L26
A9 Pin 15 of 74LS245 L6, L10, L14, L18, L22, L26
A10 Pin 16 of 74LS245 L6, L10, L14, L18, L22, L26
A11 Pin 17 of 74LS245 L6, L10, L14, L18, L22, L26
A12 Pin 18 of 74LS245 L6, L10, L14, L18, L22, L26
A13 Pin 11 of 74LS245 M6, M10, M14, M18, M22, M26
A14 Pin 12 of 74LS245 M6, M10, M14, M18, M22, M26
A15 Pin 13 of 74LS245 M6, M10, M14, M18, M22, M26
A16 Pin 14 of 74LS245 M6, M10, M14, M18, M22, M26
A17 Pin 15 of 74LS245 M6, M10, M14, M18, M22, M26
A18 Pin 16 of 74LS245 M6, M10, M14, M18, M22, M26
A19 Pin 17 of 74LS245 M6, M10, M14, M18, M22, M26
A20 Pin 18 of 74LS245 M6, M10, M14, M18, M22, M26
A21 Pin 11 of 74LS244 N6, N10, N14, N18, N22, N26
A22 Pin 13 of 74LS244 N6, N10, N14, N18, N22, N26
A23 Pin 15 of 74LS244 N6, N10, N14, N18, N22, N26
A24 Pin 17 of 74LS244 N6, N10, N14, N18, N22, N26
A25 Pin 8 of 74LS244 N6, N10, N14, N18, N22, N26
A26 Pin 6 of 74LS244 N6, N10, N14, N18, N22, N26
A27 Pin 4 of 74LS244 N6, N10, N14, N18, N22, N26
A28 Pin 2 of 74LS244 N6, N10, N14, N18, N22, N26
A29 GND
A30 GND
A31 GND
A32 GND
 
B1 +5V
B2 +5V
B3 +5V
B4 +5V
B5 Pin 11 of 74LS244 L7, L11, L15, L19, L23, L27
B6 Pin 13 of 74LS244 L7, L11, L15, L19, L23, L27
B7 Pin 15 of 74LS244 L7, L11, L15, L19, L23, L27
B8 Pin 17 of 74LS244 L7, L11, L15, L19, L23, L27
B9 Pin 2 of 74LS244 L7, L11, L15, L19, L23, L27
B10 Pin 4 of 74LS244 L7, L11, L15, L19, L23, L27
B11 Pin 6 of 74LS244 L7, L11, L15, L19, L23, L27
B12 Pin 8 of 74LS244 L7, L11, L15, L19, L23, L27
B13 Pin 11 of 74LS244 M7, M11, M15, M19, M23, M27
B14 Pin 13 of 74LS244 M7, M11, M15, M19, M23, M27
B15 Pin 15 of 74LS244 M7, M11, M15, M19, M23, M27
B16 Pin 17 of 74LS244 M7, M11, M15, M19, M23, M27
B17 Pin 2 of 74LS244 M7, M11, M15, M19, M23, M27
B18 Pin 4 of 74LS244 M7, M11, M15, M19, M23, M27
B19 Pin 6 of 74LS244 M7, M11, M15, M19, M23, M27
B20 Pin 8 of 74LS244 M7, M11, M15, M19, M23, M27
B21 Pin 2 of 74LS244 N7, N11, N15, N19, N23, N27
B22 Pin 4 of 74LS244 N7, N11, N15, N19, N23, N27
B23 Pin 6 of 74LS244 N7, N11, N15, N19, N23, N27
B24 Pin 8 of 74LS244 N7, N11, N15, N19, N23, N27
B25 Pin 5 of 74F151 B29
B26 Pin 5 of 74F151 B28
B27 Pin 5 of 74F151 A29
B28 Pin 5 of 74F151 A28
B29 GND
B30 GND
B31 GND
B32 GND

The ICs:

  • A28, A29 = 74F151
  • B28, B29 = 74F151
  • C29 = 74F174
  • L6, L10, L14, L18, L22, L26 = 74LS245
  • L7, L11, L15, L19, L23, L27 = 74LS244
  • M6, M10, M14, M18, M22, M26 = 74LS245
  • M7, M11, M15, M19, M23, M27 = 74LS244
  • N6, N10, N14, N18, N22, N26 = 74LS244
  • N7, N11, N15, N19, N23, N27 = 74LS244

CN11

Pin Connected to Location
A1 +5V
A2 +5V
A3 +5V
A4 +5V
A5 Pin 4 of 74LS244 A6, A10, A14, A18, A22, A26
A6 Pin 6 of 74LS244 A6, A10, A14, A18, A22, A26
A7 Pin 8 of 74LS244 A6, A10, A14, A18, A22, A26
A8 Pin 13 of 74LS244 A6, A10, A14, A18, A22, A26
A9 Pin 15 of 74LS244 A6, A10, A14, A18, A22, A26
A10 Pin 17 of 74LS244 A6, A10, A14, A18, A22, A26
A11 Pin 2 of 74LS244 B6, B10, B14, B18, B22, B26
A12 Pin 4 of 74LS244 B6, B10, B14, B18, B22, B26
A13 Pin 6 of 74LS244 B6, B10, B14, B18, B22, B26
A14 Pin 8 of 74LS244 B6, B10, B14, B18, B22, B26
A15 Pin 11 of 74LS244 B6, B10, B14, B18, B22, B26
A16 Pin 13 of 74LS244 B6, B10, B14, B18, B22, B26
A17 Pin 15 of 74LS244 B6, B10, B14, B18, B22, B26
A18 Pin 17 of 74LS244 B6, B10, B14, B18, B22, B26
A19 Pin 11 of 74LS244 N7, N11, N15, N19, N23, N27
A20 NC?
A21 Pin 2 of 74LS244 A6, A10, A14, A18, A22, A26
A22 Pin 9 of 74F174 C29
A23 NC?
A24 NC?
A25 NC?
A26 NC?
A27 NC?
A28 NC?
A29 GND
A30 GND
A31 GND
A32 GND
 
B1 +5V
B2 +5V
B3 +5V
B4 +5V
B5 Pin 2 of 74LS245 A7, A11, A15, A19, A23, A27
B6 Pin 3 of 74LS245 A7, A11, A15, A19, A23, A27
B7 Pin 4 of 74LS245 A7, A11, A15, A19, A23, A27
B8 Pin 5 of 74LS245 A7, A11, A15, A19, A23, A27
B9 Pin 6 of 74LS245 A7, A11, A15, A19, A23, A27
B10 Pin 7 of 74LS245 A7, A11, A15, A19, A23, A27
B11 Pin 8 of 74LS245 A7, A11, A15, A19, A23, A27
B12 Pin 9 of 74LS245 A7, A11, A15, A19, A23, A27
B13 Pin 2 of 74LS245 B7, B11, B15, B19, B23, B27
B14 Pin 3 of 74LS245 B7, B11, B15, B19, B23, B27
B15 Pin 4 of 74LS245 B7, B11, B15, B19, B23, B27
B16 Pin 5 of 74LS245 B7, B11, B15, B19, B23, B27
B17 Pin 6 of 74LS245 B7, B11, B15, B19, B23, B27
B18 Pin 7 of 74LS245 B7, B11, B15, B19, B23, B27
B19 Pin 8 of 74LS245 B7, B11, B15, B19, B23, B27
B20 Pin 9 of 74LS245 B7, B11, B15, B19, B23, B27
B21 Pin 7 of 74F251 D2, D3, E2, E3, E28, F28, F29, F30, G28, G29, G30, H28, H29, H30, J28, J29, J30, K28, K29, K30
B22 Pin 7 of 74F251 + Pin 4 on 74F138 C1, C2, C3, D1, D28, D29, E29, E30, F1, F2, F3, G1, G2, G3, H2, H3, J2, J3, K2, K3, C28
B23 NC?
B24 NC?
B25 NC?
B26 NC?
B27 NC?
B28 NC?
B29 GND
B30 GND
B31 GND
B32 GND

The ICs:

  • A6, A10, A14, A18, A22, A26 = 74LS244
  • A7, A11, A15, A19, A23, A27 = 74LS245
  • B6, B10, B14, B18, B22, B26 = 74LS244
  • B7, B11, B15, B19, B23, B27 = 74LS245
  • C1, C2, C3 = 74F251
  • C28 = 74F138
  • C29 = 74F174
  • D1, D2, D3, D28, D29 = 74F251
  • E2, E3, E28, E29, E30 = 74F251
  • F1, F2, F3, F28, F29, F30 = 74F251
  • G1, G2, G3, G28, G29, G30 = 74F251
  • H2, H3, H28, H29, H30 = 74F251
  • J2, J3, J28, J29, J30 = 74F251
  • K2, K3, K28, K29, K30 = 74F251
  • N7, N11, N15, N19, N23, N27 = 74LS244