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Difference between revisions of "Leapster Explorer: How To Make a NAND Cartridge"

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==Introduction==
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== Summary ==
  
 
This tutorial documents the steps to follow in order to replace a Leapster Explorer cartridge's One-Time-Programmable memory chip with a rewritable NAND memory chip, create a UBIFS partition/volume on the NAND, and mount the volume in Linux.
 
This tutorial documents the steps to follow in order to replace a Leapster Explorer cartridge's One-Time-Programmable memory chip with a rewritable NAND memory chip, create a UBIFS partition/volume on the NAND, and mount the volume in Linux.
  
==Requirements==
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== Hardware Requirements ==
  
 
Leapster Explorer game cartridge.
 
Leapster Explorer game cartridge.
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NAND chip - a 512MB chip was used for this tutorial (2 GB max)  
 
NAND chip - a 512MB chip was used for this tutorial (2 GB max)  
  
Soldering equipment
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Soldering equipment (incl. solder paste and wick)
  
 
'''Strongly recommended:'''
 
'''Strongly recommended:'''
 
A microscope or similar high-powered magnifier.
 
A microscope or similar high-powered magnifier.
 
  
 
==Hardware Instructions==
 
==Hardware Instructions==
  
 
*Open the cartridge's plastic casing, remove the PCB, and Desolder the OTP part from the PCB
 
*Open the cartridge's plastic casing, remove the PCB, and Desolder the OTP part from the PCB
[http://imgur.com/dK2kj.jpg| Photo of cartridge before replacement of OTP.]
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[[File:LeapFrog_Cartridge_Stock.jpg|320px]]
  
 
*Clean the OTP pads on the PCB using solder wick
 
*Clean the OTP pads on the PCB using solder wick
  
[http://imgur.com/305cJ.jpg| Photo of cartridge after removal of OTP.]
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[[File:LeapFrog_Cartridge_Desoldered.jpg|320px]]
  
 
*Apply solder paste to the nand pads, and apply soldering iron on pads to melt solder; the surface tension will draw the solder onto the pads. Clean up excess.
 
*Apply solder paste to the nand pads, and apply soldering iron on pads to melt solder; the surface tension will draw the solder onto the pads. Clean up excess.
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* Melt the solder on the other pins to fully solder the nand in place
 
* Melt the solder on the other pins to fully solder the nand in place
  
[http://imgur.com/I7tL4.jpg Photo of cartridge after installation of NAND.]
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[[File:LeapFrog_Cartridge_NAND_Replaced.jpg|320px]]
  
 
* Use a continuity checker DMM to verify good contact between the pads and NAND pins. (repair joints as necessary)
 
* Use a continuity checker DMM to verify good contact between the pads and NAND pins. (repair joints as necessary)
  
 
* Desolder R4 and R5 and resolder them as pullups on the alternate pads.
 
* Desolder R4 and R5 and resolder them as pullups on the alternate pads.
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** For more info [[LeapFrog_Pollux_Platform:_Cartridge_Settings| Cartridge Settings]]
  
(Todo: Need photo of this)
 
  
 
==Software Instructions==
 
==Software Instructions==
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Mount the drive
 
Mount the drive
 
  mount -t ubifs ubi2:Cartridge /LF/Cart
 
  mount -t ubifs ubi2:Cartridge /LF/Cart
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 +
[[Category:Leapster Explorer]]

Latest revision as of 09:57, 27 October 2011

Summary

This tutorial documents the steps to follow in order to replace a Leapster Explorer cartridge's One-Time-Programmable memory chip with a rewritable NAND memory chip, create a UBIFS partition/volume on the NAND, and mount the volume in Linux.

Hardware Requirements

Leapster Explorer game cartridge.

NAND chip - a 512MB chip was used for this tutorial (2 GB max)

Soldering equipment (incl. solder paste and wick)

Strongly recommended: A microscope or similar high-powered magnifier.

Hardware Instructions

  • Open the cartridge's plastic casing, remove the PCB, and Desolder the OTP part from the PCB

LeapFrog Cartridge Stock.jpg

  • Clean the OTP pads on the PCB using solder wick

LeapFrog Cartridge Desoldered.jpg

  • Apply solder paste to the nand pads, and apply soldering iron on pads to melt solder; the surface tension will draw the solder onto the pads. Clean up excess.
  • Place nand onto board on the soldered pads and align the dot with the upper left. (A dot of 'fun-tack' putty underneath the NAND is useful to help keep the part in place)
  • Solder one corner pin on each side to tack the NAND down by melting the solder on the pad
  • Melt the solder on the other pins to fully solder the nand in place

LeapFrog Cartridge NAND Replaced.jpg

  • Use a continuity checker DMM to verify good contact between the pads and NAND pins. (repair joints as necessary)
  • Desolder R4 and R5 and resolder them as pullups on the alternate pads.


Software Instructions

Make sure CartManager is running

CartManager &

Insert the cart and format the Nand with ubi

ubiformat /dev/mtd10 -s 512

Attach the ubifs partition

ubiattach /dev/ubi_ctrl -m 10 -O 2048 -d 2

Create a ubifs volume

ubimkvol /dev/ubi2 -N Cartridge -s 490MiB

Mount the drive

mount -t ubifs ubi2:Cartridge /LF/Cart