Hacking Convert Sram GBA game to Fram save

GoodTofuFriday

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Seems like PCB version agb-e11-01 can work as a drop in replacement for any gba game that ram on sram battery saves. To do so I swapped the roms from the two different games. in this case I swapped megaman battle network 1's rom onto the pcb and it worked perfectly.
Thats really it!

image2.jpg image1.jpg sp4H0xY.jpg
 
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Ryccardo

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Data retention is roughly up to 10 years before you got to replace it agian.
Not really, it means how often the data must be rewritten to ensure it will stay readable... the biggest downside of FRAM conversion (not that I've seen anyone complain about it yet) is that FRAM has a relatively limited amount of write cycles compared to infinitely reusable SRAM, which for this reason may be used in games that save very often or outright use it as memory expansion...

Solder points? Peel/roll off the tabs from the original battery, tape in place a spare, fit the cover back on, solderless replacement :)

(I wonder why OP didn't remove the battery and swap the save chips instead of the roms, though)
 
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how_do_i_do_that

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Because he replaced the use of the SRAM chip with the FRAM chip. He did it by moving the FRAM and ROM to a new board. Which requires soldering. His whole point was to ditch the battery.

He basically bought something like this: https://www.semiconductorstore.com/cart/pc/viewPrd.asp?idproduct=66997
To replace the SRAM for his Megaman game.


Megaman Battle Network 4-6 already uses a FRAM chip, so the swap of the ROM chip would work for him.
20110912_042351_2406_pcb_front.jpg



AGB-E11-01 Boards
Megaman Battle Network 3
1061_2007-01-18_AGB-A3XE-USA_PCB-Front.jpg


You could have just swapped out the ROMS instead of putting a new FRAM in.

Megaman Battle Network 2 uses the AGB-E06-10 board, which has the battery and SRAM chip.


Here is a list of MMBN with what PCB they use: source
Code:
Mega Man Battle Network / Rockman EXE
AGB-AREJ-JPN / AGB-E06-01 / 256K SRAM
AGB-AREE-USA / AGB-E06-10 / 256K SRAM

Mega Man Battle Network 2 / Rockman EXE 2
AGB-AE2J-JPN / AGB-E06-10 / 256K SRAM
AGB-AE2E-USA / AGB-E06-10 / 256K SRAM
AGB-AE2E-USA / AGB-E11-01 / 256K FRAM

Mega Man Battle Network 3 White / Rockman EXE 3
AGB-A6BJ-JPN / AGB-E06-20 / 256K SRAM
AGB-A6BE-USA / AGB-E11-01 / 256K FRAM

Mega Man Battle Network 3 Blue / Rockman EXE 3 Black
AGB-A3XJ-JPN / AGB-E06-20 / 256K SRAM
AGB-A3XE-USA / AGB-E11-01 / 256K FRAM

Mega Man Battle Network 4: Red Sun / Rockman EXE 4: Tournament Red Sun
AGB-B4WJ-JPN / AGB-E06-20 / 256K SRAM / Red cartridge
AGB-B4WE-USA / AGB-Y11-01 / 256K FRAM

Mega Man Battle Network 4: Blue Moon / Rockman EXE 4: Tournament Blue Moon
AGB-B4BJ-JPN / AGB-E06-20 / 256K SRAM / Blue cartridge
AGB-B4BJ-JPN / AGB-E11-01 / 256K FRAM / Blue cartridge (!)
AGB-B4BJ-JPN / AGB-E11-01 / 256K FRAM / Black cartridge
AGB-B4BE-USA / AGB-Y11-01 / 256K FRAM

Rockman EXE 4.5: Real Operation
AGB-BR4J-JPN / AGB-E05-01 / 512K Flash + RTC

Mega Man Battle Network 5: Team ProtoMan / Rockman EXE 5: Team of Blues
AGB-BRBJ-JPN / AGB-Y11-01 / 256K FRAM
AGB-BRBE-USA / AGB-Y11-02 / 256K FRAM

Mega Man Battle Network 5: Team Colonel / Rockman EXE 5: Team of Colonel
AGB-BRKJ-JPN / AGB-Y11-01 / 256K FRAM / Turquoise cartridge
AGB-BRKE-USA / AGB-Y11-02 / 256K FRAM
AGB-BRKP-UKV / AGB-Y11-02 / 256K FRAM

Mega Man Battle Network 6: Cybeast Gregar / Rockman EXE 6: Dennoujuu Glaga
AGB-BR5J-JPN / AGB-Y11-02 / 256K FRAM
AGB-BR5E-USA / AGB-Y11-02 / 256K FRAM

Mega Man Battle Network 6: Cybeast Falzar / Rockman EXE 6: Dennoujuu Falzer
AGB-BR6J-JPN / AGB-Y11-02 / 256K FRAM
AGB-BR6E-USA / AGB-Y11-02 / 256K FRAM

Mega Man Battle Chip Challenge / Rockman EXE Battle Chip GP
AGB-A89J-JPN / AGB-E06-20 / 256K SRAM
AGB-A89E-USA / AGB-E11-10 / 256K FRAM
 
Last edited by how_do_i_do_that,

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