MVS MV-6 daughter board connectors pinouts

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