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SUBOR Cartridges

This version was saved 14 years, 4 months ago View current version     Page history
Saved by Noah Vawter
on November 28, 2009 at 9:37:48 pm
 

suborflash4.txt 

 

 

have recently dumped the SUBOR  Flashcart:

 

suborflash2.txt

 

suborflash3.txt 

 

Judging from this picture, we thought it looks like the Write Enable pin WE# of the Flash chip is connected to the bus.  This would imply being able to write to the SUBOR Flash chip.  However, investigation has shown that WE# is connected to Vcc, meaning it's impossible to tell the flash chip to write.  No Carrier has suggested that it might be "possible to wire it up to the R/W  signal on the cart edge, should check how the SRAM is connected."

 

So, now it's time to map out the SRAM chip.  DataSheet is below the jump.

 

Can someone confirm the trace between pin 7 of Flash and pin 14 or 47 of SUBOR Card Edge Connector? 

 

Also, we may need someone to layout a board of cartridges for us...

 

 

Data Sheet for Flash Memory Chip on SUBOR Cartridges:     28vf040.pdf

 

Data Sheet for SRAM Chip on SUBOR Cartridges:               BR6265.pdf

 

Device Driver for Flash Memory Chip on SUBOR Cartridges:  sst29vf040.asm  Currently, it's half in C and half in 0x86 Assembly.  Could we have a volunteer to translate it into pure C, or 6502 Assembly? 

 

Pinout for Famicom Cartridge, believed to be the same as the SUBOR: NES_Famicom_Pinouts.pdf

 

DigiKey Part Number for a female 60-pin Cartridge socket/Card Edge Connector (0.100" pitch, 0.050"-0.075" thick) A31720-ND  $3.48

 

This may be a lead to a simple AVR-based EPROM/Flash Dumper/Writer:  AVR EPROM Dumper

 

Note, Famicom signals CHR D0-D7 are not used by SUBOR.  This goes along with the VT02 Data Sheet which states that it is able to operate in "single bus mode."  This means that both program

 

 

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