Gameboy Advance Overclocker Flex

Basics

The robot_retro GBA overclocker flex mod provides a simple way of overclocking or underclocking your Gameboy advance.  I’ve simplified the install via eliminating the manual wiring process (with the exception of a single optional LED indicator wire).

Flex Key Features

• Capable of over and underclocking to 30%, 50%, 75%, 130%, 150% or 170% of base clock.
• Increase speed = Press Start and Up
• Decease speed = Press Start and Right
• Easy flex installation with optional wire link to LED DL2A.  Power LED will blink faster when overclocked and slower when underclocked.  Base speed is a solid green LED.
  

Top speed can be set to 170%, 150% or 130%

• The regular install has a maximum speed of 170%.  This is suitable for the stock LCD, Funnyplaying v2 or Hispeedido v2 (non-laminated) kits.
• If using the Hispeedido Laminated v5, bridge solder jumper S1 to limit the speed to 150%.
• If using Funnyplaying 3.0 Inch Laminated, bridge solder jumper S2 to limit the speed to 130%.

Other Features

• Very low power consumption.  Measured as <15mA using the Nordic Power Profiler Kit II.
• Accurate base clock (4.194Mhz).  Measured as >0.01% accurate.  There is will no difference between this mod and the original GBA crystal at stock speeds.

Installation

• Remove the GBA crystal.  Recommended to use a hot air station for this step.
• Install the flex as per photos.  Solder the points shown within the pink circles (total of 6 solder points).  It is recommended to use flux for this step.
• OPTIONAL: Run and wire between the flex and test point DL2A (both shown inside the yellow circles).  This will make the power LED blink faster/slower when over or underclocking.

Speed Limiting

• Bridge solder jumper S1 to limit the speed to 150%.
• Bridge solder jumper S2 to limit the speed to 130%.

Developed in collaboration with RJS FPGA