Usually, Sunday GBA developer (as my self) is using EWRAM of GBA for development. Very nice feature for no cost development at moment. However, we need PC, if we show our developed software to our friend or colleague.

GBA can boot it self and get executable code from communication port. Boot Stick ports executable code from BackUp memory of commercial game cart to EWRAM then execute. Boot Stick is using technology which is from Optimize.

TeamKNOx develops ULA-HostV2. It is possible to program backup memory area of commercial game cartridge by ULA-HostV2.

• Step 1: Put commercial game cartridge which is over than 32KB Memory area. (PokeMonAdvance cart is suitable for this purpose :-).
  
  
  
  
• Step 2: Select Data transfer from PC to GBA of ULA-HostV2. Select *.mb.gba as multiboot binary image from file open dialog box.
  
  
  
  
• Step 2.5: Data Transfer.
  
  
  
  
• Step 3: Put Boot Stick into GBA communication port. Turn on GBA with [SELECT]+[START] (as same as boot start).
  
  

• Step 1: Build up kit from Optimize

  Build Up kit from Optimize. Kit includes only BootChip, Oscillator, several wires and solder. You have to prepare PCB and connector for GBA by your self.

  
  
  
• Step 2: Cut of expansion

  Cut frame expansion which is depent on size of your soldered PCB. Frame is using Milk package (TetraPak-TM). I use pak as an infusion of parched barley.

  
  
  
• Step 3: Make mold from expansion

  Make mold from expansion.

  
  
  
• Step 4: Pour epoxy resion into the mold

  Full poured int the mold.

  
  
  
• Step 5: Extract from mold

  After soaking (aprox. one night?). Extract from mold.