Original text Diwght Elvey
Adapted to Liu Ganning design by Hans Otten

Assembling the debug board.

Parts:
1 27128 EPROM with the Diagnostic program. 
1 28 pin socket
2 220 ohm resistors (R7 and R8)
9 10K resistors (8.2K will do) all the others
1 6 position switch
1 74SL74
1 74LS02
1 74LS04
1 RED LED
1 GREEN LED
2 Dual 22 Pin edge connectors
1 Grey wire 15 cm
1 Yellow wire 15 cm
1 Green wire 15 cm
1 Red (thicker) wire long enough to connecto power +5V 1A
1 Black (thicker wire)  wire long enough to connecto power +5V 1A

Solder components:

1. 240 Ohm resistor at R7 and R8

2. All the other resistor locations use the 10K resistors.

3. Red LED at location ACCESS, Note: there is a small flat
  on its circular base above the lead. Insert it so that
  it faces to the inside of the PCB
3. Green LED at location Status, Note: there is a small flat 
  on its circular base above the lead. Insert it so that
  it faces to the inside of the PCB
5. Take the edge connector and bend the leads such that they contact
  the PC board on both sides. ( Sorry about the long leads, none of
  the other available connectors had the right clearance for the ends
  of PC board to clear. ) If you like you can cut the leads shorter.
  Solder them too the PC board, top and bottom. Do not have the leads
  under stress by the solder. It is essential that the leads are bent
  correctly before solding. Do not use the solder under tension
  with the connectors leads or it will lift the traces. The leads
  must be bent to be in close contact with the traces.

6. Solder the position switch so that the 1 end is facing the bottom of the PCB.

For the ICs and EPROM socket note the solder mask mark indicating the pin 1 end.

7. Install and solder the EPROM socket at U3.

8. Install the 74LS04 in U1 and solder the leads.

9. Install the 74LS02 in U2 and solder the leads.

10. Install the 74LS74 in U4 and solder the leads.

10. Install the EPROM at the EPROM socket, making sure the
   orientation is correct.

11. Attach wires onto the other edge connector such that the leads
    don't short. It helps cut the leads shorter. Make sure the soldered
    joint it close to the insulation and the all the loose ends are
    wrapped on the connector pins.
    I recommend putting the connectors on the KIM-1 at this point so that
    the spacing is correct. The DEBUG board goes on the edge connector
    at the processor end of the board, the top left. This is refered to as the
    Expansion connector.
    The other edge connector goes on the end with all the discreet parts.
    This is refered to as the Aplication connector, on the bottom left of the KIM-1

12.  Run the Grey wire from Application pin E (5th pin)
     to debug board solder pad P2E. This is signal K3.
 
13. Run the Yellow wire from Application pin F (6th pin) to debug board solder
    pad P2F. This is signal K4.
  
14  Run the Green wire from Application pin K (9th pin)
    to the solder pad marked P3. (In alphabetical pin labels I, O
    and Q are skipped to avoid confusion with the numbers 1 and 0 )
    Special note here. If there is a jumper wire, connected on your
    KIM-1, to the board pin K and ground, remove it.
    This is signal Decode Enable.
  
15. Connect a Red wire to Application Pin A (same row as the other wires)

16. Coneect a Balck wire to Application Pin 1. The only wire to the other row of the Application connector.

Make sure the +5V supply you use is regulated and filtered 5VDC and
greater than 1.2 Amperes ( some cheap wall plug transformers that
state 5VDC are neither regulated or filtered and should not be used).

This completes the Debug Board assembly. Refer to the instructions
for how to use it for both debugging failures on your KIM-1 and for
using the additional space on the EPROM for storing your programmes.
