Circuit diagram legend

The following electronical parts are used in the cables and adaptors discussed on these pages. If you'd like to buy parts for the cables and adaptors, see the electronical parts page.

Wires

Description Graphical representation

Wire.

[Wires]

Ground wire. If you have a shielded cable then use the shielding for the line marked as "GND" on the diagrams.

[Ground wire]

Not connected wires. Note the small split in the horizontal wire.

[Wires]

Connected wires. Note the small dot, representing the solder blob.

[Junction]

Electronical parts

Description Graphical representation

Amplifier. It consists of one transistor and one resistor. The transistor has three pins. The collector (marked with C) should be connected to the wire coming from the Commodore end of the cable. The base (marked with B) should be connected to the wire coming from the PC end of the cable, through a resistor. The emitter (marked with E) should be grounded.
The first picture shows the amplifier. The second picture displays a BSV52 transistor (SOT-23 packaging) as viewed from above. The third picture displays a 2N3904 transistor (TO-92 packaging) as viewed from below, where its pins are. Note that the pin layouts are specific to the transistors; others may have their pins laid out differently.

[Amplifier] [BSV52 transistor]

[2N3904 transistor]

Diode. Their cathode end is marked with a small band, which corresponds with the direction the "arrow", representing the diode in the circuit diagram, points to (on this picture, the right side). In all tables, the right column shows the pin the cathode should point to.

[Diode]

Exclusive-OR gate. Their output corresponds with the direction the "arrow", representing the exclusive-OR gate in the circuit diagram, points to (on this picture, the right side).

[Exclusive-OR gate]

Inverter. Their output corresponds with the direction the "arrow", representing the inverter in the circuit diagram, points to (on this picture, the right side).

[Inverter]

Resistor.

[Resistor]

Connectors

Description Graphical representation

DIN plug, 6-pin. It is displayed on the diagram as viewed from the back side, the solder side. On some DIN plugs, the pins are marked with small numbers.

[6-pin DIN plug]

DIN port, 6-pin. It is displayed on the diagram as viewed from the back side of the Commodore drive or the adaptor.

[6-pin DIN port]

DIN plug, 8-pin. It is displayed on the diagram as viewed from the back side, the solder side. On some DIN plugs, the pins are marked with small numbers.
IMPORTANT: This is a DIN41524 type ("262-degree") plug where pins 7 and 8 are "out of circle". On the more common DIN45326 type ("270-degree") plug, the seven outer pins form a circle, which is mechanically incompatible.

[8-pin DIN plug]

Game plug. It is displayed on the diagrams as viewed from the back side, the solder side. On some game plugs, the pins are marked with small numbers.

[Game plug]

Game port. It is displayed on the diagrams as viewed from the back side, the solder side. On some game ports, the pins are marked with small numbers.

[Game port]

Mini-DIN plug, 7-pin. It is displayed on the diagram as viewed from the back side, the solder side. On some mini-DIN plugs, the pins are marked with small numbers.

[Mini-DIN plug]

Parallel plug. It is displayed on the diagrams as viewed from the back side, the solder side. On some parallel plugs, the pins are marked with small numbers.

[Parallel plug]

RCA plug. It is available in several colors to help with finding the matching plugs and ports.

[RCA plug]

RCA port. It is available in several colors to help with finding the matching plugs and ports.

[RCA port]

S-Video plug (Mini-DIN plug, 4-pin). It is displayed on the diagrams as viewed from the back side, the solder side. On some S-Video plugs, the pins are marked with small numbers.

[S-Video plug]

USB plug. It is displayed on the diagrams as viewed from the back side, the solder side.

[USB plug]

User port plug. It is displayed on the diagrams as viewed from the back side, the solder side. On some user port plugs, the pins are marked with small numbers, from 1 to 12; there's a letter "B" the left end of the upper row, which corresponds to pins 1-12, and a letter "A" on the left end of the lower row, which corresponds to pins A-N.

[User port plug]

User port edge. It is displayed on the diagrams as viewed from the back side of the Commodore machine or the adaptor.

[User port edge]

XA1541 mini-adaptor port. The 5-pin edge on the rear of the XA1541 mini-adaptor. The port is displayed on the diagrams as viewed from the rear of the adaptor.

[XA1541 mini-adaptor port]

Chips

Description Graphical representation

CIA periphery chip. It has the type number 6526, 8520 or 8521 printed on it. It is displayed on the diagrams as viewed from above. The small semicircular cut helps you with finding the correct orientation.

[CIA chip]

Exclusive-OR IC. IC of type 74LS86. It is displayed as viewed from above. The small semicircular cut helps you with finding the correct orientation. Pin 7 is GND, pin 14 is +5V, the other pins are in triplets: pins 1-2, 4-5, 9-10 and 12-13 are the inputs and pins 3, 6, 8 and 11 are the corresponding outputs.

[Exclusive-OR IC]

Inverter IC. IC of type 7406. It is displayed as viewed from above. The small semicircular cut helps you with finding the correct orientation. Pin 7 is GND, pin 14 is +5V, the other pins are in pairs: pins 1, 3, 5, 9, 11 and 13 are the inputs and pins 2, 4, 6, 8, 10 and 12 are the corresponding outputs.

[Inverter IC]

VIA#1 periphery chip. It has the type number 6522 printed on it and none of its pins 3-9 are connected to any other chip. It is displayed on the diagrams as viewed from above. The small semicircular cut helps you with finding the correct orientation.

[VIA chip]

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