VCII IC Pinouts (A5 Boards)

Location: U1
DEVICE: TL071/JFET OPAMP
Pin    Function/Name
1 - Not Used
2 - Inverting Input (-)
3 - Non-Inverting Input (+)
4 - Negative 12VDC (-)
5 - Not Used
6 - Positive 12VDC (+)
7 - Output
8 - Not Used

Location: U2
DEVICE: SOCN24765-1 Left Channel DAC
Pin    Function/Name
1 - VSS
2 - To Ext. Cap C16
3 - Output
4 - Out To Left Audio Output
5 - No Connection
6 - Via R5 To Left Audio Output
7 - + 5VDC
8 - Ground
9 - Data B6
10 - Data B5
11 - Data B4
12 - Data B3
13 - Data B2
14 - Data B1
15 - VCC (+5 VDC)
16 - BCLK (From U24 Pin 4)
17 - Data B7
18 - Data B8
19 - Data B9
20 - +/-

Location: U3
DEVICE: SOCN24765-1 Right Channel DAC (Or Mono)
Pin    Function/Name
1 - VSS
2 - To Ext. Cap C16
3 - Output
4 - Out To Left Audio Output
5 - No Connection
6 - Via R5 To Left Audio Output
7 - + 5VDC
8 - Ground
9 - Data B6
10 - Data B5
11 - Data B4
12 - Data B3
13 - Data B2
14 - Data B1
15 - VCC (+5 VDC)
16 - ACLK (From U24 Pin 2)
17 - Data B7
18 - Data B8
19 - Data B9
20 - +/-

Location: U4
DEVICE: SOCN24298-1 AMI
Pin    Function/Name
1 - PAM I
2 - Ground
3 - PAM Q
4 - Ext. D To J310 Pin 23 Thru U9
5 - Data B6
6 - Data B5
7 - Data B4
8 - Data B3
9 - Data B2
10 - Data B1
11 - +/- (Overflow)
12 - Data B9
13 - Data B8
14 - Data B7
15 - Enable (Active High)
16 - Bit Error (Active High)
17 - ACLK Signal (High)
18 - ACLK Signal (Low)
19 - K CLK
20 - K Data
21 - 7.16 MHz Clock
22 - VCC (+5 VDC)
23 - Frame Reset
24 - Data Enable

Location: U5
DEVICE: SOCN24297-3
Pin    Function/Name
1 - Ground
2 - K0
3 - K1
4 - K2
5 - K3
6 - K4
7 - Reset (From U24 Pin 16)
8 - K5
9 - K6
10 - K7
11 - Clock
12 - Ground
13 - Ground
14 - Frame
15 - K CLK
16 - No Connection
17 - No Connection
18 - K Data
19 - +5 VDC
20 - K Data
21 - Ground
22 - Sel 1
23 - Sel 2
24 - +5 VDC

Location: U6
DEVICE: MB88303 Character Generator (Fujitsu)
Pin    Function/Name
1 - Reset (Active High)
2 - No Connection
3 - No Connection
4 - No Connection
5 - Von
6 - Vob
7 - Vsync (Active High)
8 - Hsync (Active High)
9 - OSC In
10 - OSC Out
11 - VSS
12 - LDI
13 - ADM
14 - D0
15 - D1
16 - D2
17 - D3
18 - D4
19 - D5
20 - D6
21 - D7
22 - VCC
Location: U7
DEVICE: TMS70C40NL MASK PROGRAMMED DES CHIP
Pin    Function/Name
1 - Data B5
2 - Data B7
3 - Data B0
4 - Data B1
5 - Data B2
6 - No Connection
7 - Control A1
8 - A2 (Tied High At +5 VDC)
9 - A3 (Tied To Ground)
10 - A4 (Tied To Ground)
11 - A4 (Tied High At +5 VDC)
12 - Int1 Reset When High
13 - Int3 Reset When High
14 - Cold Start Reset (Kill Seedkey Data When Pulled Low)
15 - A6 (Tied To Ground)
16 - A5 (Tied To Ground)
17 - CLK In
18 - XTAL 2
19 - Data D7
20 - Data D6
21 - Data D5
22 - Data D4
23 - Data D3
24 - Data D2
25 - VCC (+5 VDC)
26 - Data D1
27 - Data D0
28 - C0 (To J310 Pin 26)
29 - C1 (To J310 Pin 4)
30 -
31 - C3 To Control Bus (A4)
32 - C4 To U5
33 - C5 To U5
34 - C6 To U5
35 -
36 - MC (Microprocessor Mode Pin) Tied To Ground
37 - B3 To U5
38 - B4 To U5
39 - B6 To U5
40 - VSS (Ground)
Location: U8
DEVICE: CD4053BE MUX/DEMUX
Pin    Function/Name
1 - Input BY
2 - Input BX
3 - Input CY
4 - Out/In CX Or CY
5 - In/Out CX
6 - INH
7 - Vee
8 - Vss
9 - C
10 - B
11 - A
12 - In/Out Ox
13 - In/Out Oy
14 - Out/In Ox Or Oy
15 - Out/In Bx Or By
16 - Vdd
Location: U9
DEVICE: 74LS125AN QUAD BUFFER
Pin    Function/Name
1 - Ground
2 - Input (Comp. Sync)
3 - Output (Comp. Sync)
4 - Ground
5 - Input (Comp. Blanking)
6 - Output (Comp. Blanking)
7 - No Connection
8 - No Connection
9 - No Connection
10 - No Connection
11 - No Connection
12 - No Connection
13 - No Connection
14 - No Connection
Location: U10
DEVICE: 7406N BUFFER DRIVER
Pin    Function/Name
1 - Input
2 - Output
3 - Input
4 - Output
5 - Input
6 - Output
7 - Ground
8 - Output
9 - Input
10 - Output
11 - Input
12 - Output
13 - Input
14 - Vss
Location: U11
DEVICE: 74LS374 Octal Latch
Pin    Function/Name
1 - CE (Output Control)
2 - 1Q (Output For D0)
3 - D0 (Input)
4 - D1 (Input)
5 - O1 (Output)
6 - O2 (Output)
7 - D2 (Input)(
8 - D3 (Input)
9 - O3 (Output)
10 - Ground
11 - CP Or Clock
12 - O4 (Output)
13 - D4 (Input)
14 - D5 (Input)
15 - O5 (Output)
16 - O6 (Output)
17 - D6 (Input)
18 - D7 (Input)
19 - O7 (Output)
20 - Vcc

Location: U12
DEVICE: 74LS244 INVERTING OCTAL BUS DRIVER
Pin    Function/Name
1 - G1 (Active High)
2 -
3 - D3
4 - D5 (Input)
5 - D2 (Output)
6 - D6 (Input)
7 - D1 (Output)(
8 - D7 (Input)
9 - D0 (Output)
10 - No Connection
11 - D0 (Input)
12 - D7 (Output)
13 - D1 (Input)
14 - D6 (Output)
15 - D2 (Input)
16 - D5 (Output)
17 - D3 (Input)
18 - D4 (Output)
19 - G2 (Active High)
20 - Vcc (+5 VDC)

Location: U13
DEVICE: SD5000 QUAD SWITCH
Pin    Function/Name
1 - Output
2 - Vcc (+5 VDC)
3 - Gate
4 - Input
5 -
6 - Gate
7 - (
8 - Output
9 - Output
10 -
11 - Gate
12 -
13 - Input
14 - Gate
15 -
16 - Output

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