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Musashi 3 Upgrade 

Tadao 1.1 Matrix Board 

 

Features 

 

Built on the Musashi code base (hybrid debounce scheme) 

 

Includes three fire modes: uncapped semi-auto, capped semi-auto, and 
modified NXL/PSP 

 

Continuously monitors the trigger switch through the entire firing cycle 

 

ABS programming prevents first shot drop off 

 

AMB algorithms help to eliminate mechanical bounce 

 

Power efficient software lengthens battery life 

 

Programming mode allows changes to debounce, dwell, loader delay,  
and fire mode 

 

All settings are stored in non-volatile memory so they are not lost when 
power is disconnected 

 

One-touch startup enables the marker to fire instantly 

 

Automatic 15-minute idle power down saves batteries 

 

Force shot allows the marker to be fired when the eyes are enabled but 
no object is present in the breech 

 

Installation 

Upgrade Chip Installation 

– Removal

 

and installation of the chip on a Tadao 1.1, 

Matrix board must be carefully done to ensure the chip and the electronics are not 
damaged. Begin by removing the grips from the left side of the marker. This will 
expose the entire circuit board. The chip is located in a socket near the bottom of 
the grip frame. To remove, gently pry under each end with a small flathead screw 
driver. Alternate sides until it is far enough out to remove with your fingers. Insert 
the new chip, making sure it is aligned properly. A notch in one end of the chip 
lines up with a notch in the socket and the white drawing on the surface of the 
board. If the marker will not turn on and it is not due to a low battery or broken 
battery harness, you may have installed the chip backwards. 
 
 

LED Indicator 

The single color LED that shines out the back of the grip panels shows which 
mode of operation the marker is currently in: 
 
Solid  

 Eyes 

enabled 

Slow Blinking 

 

Eyes disabled, rate of fire limited to 20 balls per 

 

  second 

in 

mode 

1; 

otherwise capped at 15 balls 

per second for fire modes 2 and 3 

 
 

Power and Eye Operation 

Pressing and releasing the power button turns the marker on. It will show a solid 
color LED in the grip frame to indicate that the marker is ready to be used. 
 
The eyes are enabled when the marker is first turned on. To disable the eyes press 
and hold the power button for 1 second. The LED will start slowly blinking to 
indicate the eyes are turned off. 
 
To turn the marker off, press and hold the power button for 1 second again.  The 
marker will power down. 
 

Power Button Sequence 

1.

 

Press and release power button. 

2.

 

LED lights solid to indicate the eyes are on. 

3.

 

To disable eye system, press and hold power button for 1 second. 

4.

 

Eye system turns off, LED slowly blinks to indicate eyes off mode. 

5.

 

To turn off, press and hold power button for 1 second. 

6.

 

Marker turns off. 

 
Note that the eye logic can tell the difference between paint being fired and an 
object constantly blocking the eyes. The eyes watch for the bolt to return every 
shot, so if this does not happen, it will slow down the maximum rate of fire to 
prevent additional ball breakage. 

 

Programming 

The user may enter programming mode by shorting the lower right pins on the 
chip while the marker is off.  A conductive object such as a hex wrench must be 
used. 

 

 
When pins 5 and 6 are shorted together, the board will boot into programming 
mode, which is indicated by a rapidly flashing LED. 
 
Pulling and releasing the trigger quickly will toggle between the different 
programming modes: 
 

 
One Pulse 

Debounce  

 Two 

Pulses 

Dwell 

 

Three Pulses  Loader Delay 

 Four 

Pulses 

Fire 

Mode 

 
When the LED is pulsing for the desired setting, press and hold the trigger until 
the LED goes out. When you release the trigger, the LED will blink to show the 
current setting. For example, if the current setting for debounce is 5, the LED will 
blink 5 times. Once the LED stops blinking, you have 3 seconds to begin entering 
the new setting. 
 
To enter the new setting, pull the trigger the desired number of times. For example, 
to set the debounce to 2, you must pull the trigger 2 times. Every time you pull the 
trigger the LED will light. After all settings have been changed, turn the marker 
off, using the power button. 
 

Programming Example

  

 
If you want to set the dwell to 20, you should: 
 

Make sure the marker is powered off. 
Ground pins 5 and 6 on the microcontroller. 
The LED will blink rapidly to indicate the board is in programming mode. 
After blinking, the LED will pulse once every second. This indicates that you 
are in the debounce mode. 
Quickly pull and release the trigger one time to switch to the dwell mode.  
The LED will now pulse two times every second. 
Pull and HOLD the trigger until the LED turns off. 
Release the trigger. The LED will blink out the current setting. 
When the LED stops blinking, enter the new setting by pulling the trigger  

20 times. 

Wait until the LED flashes rapidly to confirm the new setting. 
Turn the marker off. 

 

 

Settings 

 

Debounce

 – The Musashi software features a hybrid debounce scheme that uses 

microcontroller cycles to debounce the pull of the trigger and ½ ms time 
increments to debounce the release. This results in a very effective debounce 
algorithm that does not hinder the user at any setting. At low debounce settings, 

 

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