theN64 Myth I/O list V1.1 and the Upgrade Core

[Dr.neo]

theN64 Myth I/O list V1.1 and the Upgrade Core

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NEO N64 CARD MENU IO

WRITE N64 N64 SRAM area

RUN_IO   >  $10040020 W:FFFF --- other IO can't change, because must lock the RUN_IO when play the N64 game
INT_IO   >  $10040024 W:FFFF --- enter SOFT MENU MODE
                      W:0000 --- OFF
  

all the follow CMDs is valid ONLY after INI_IO active

NEO_IO   >  $10040028 W:FFFF READ $?2000000 $x3FFFFFF  the Neo N64 Myth hardware only can load 16bit data ( the NEO CARD COMMAND mode)
                      W:0000 OFF

ROMC_IO  >  $1004002C W:FFFF RUN CARD
                      W:0000 OFF
 
ROMSW_IO >  $10040030 W:0000 = NEO GBA CARD TO N64 ROM ADR $?2000000 $x3FFFFFF  
                               NEO N64 MENU TO N64 ROM ADR $?0000000~$x1FFFFFF
  
            $10040030 W:FFFF = NEO GBA CARD TO N64 ROM ADR $?0000000 $x3FFFFFF  
                               NEO N64 MENU OFF
 
SRAM2C_IO > $10040034 W:FFFF = NEO GBA CARD SRAM TO N64 SRAM $10000000~$1003FFFF
             it's valid only when disable the SAVE_IO

RST_IO   >  $10040038 W:FFFF = PUSH N64 RESET BACK MENU MODE
                      W:0000 = NO RESET BACK MENU MODE

CIC_IO   >  $1004003C W:FFFF = CIC OPEN
                      W:0000 = CIC use the default setting


SAVE_IO  >  $10040000 W:0000 > EXT CARD SAVE
                      W:0001 > SRAM  32KB
                      W:0002 > SRAM  64KB
                      W:0003 > SRAM 128KB
                      W:0004 > FRAM 128KB (FLASH RAM )
                      W:0005 > EEP4K
                      W:0006 > EEP16K
                      W:0008 > SRAM 256KB  < INT_IO MODE
                      W:000F > SAVE OFF

CIC_IO   >  $10040004 W:0000 > EXT CARD CIC
                      W:0001 > 6101
                      W:0002 > 6102
                      W:0003 > 6103
                      W:0005 > 6105
                      W:0006 > 6106


ROM_BANK  > $10040008  BIT0 = RA22
                       BIT1 = RA23
                       BIT2 = RA24
                       BIT3 = RA25    

BANK minimum is 64Mbit
BANK maximum is 1Gbit
                            
ROM_SIZE  > $1004000C  BIT0 >0 ( NA22 = RA22 )
                       BIT1 >0 ( NA23 = RA23 )
                       BIT2 >0 ( NA24 = RA24 )
                       BIT3 >0 ( NA25 = RA25 )    
                      
NAXX = N64 ADR
RAXX = GBA CARD ADR                            





upgrade core download:
http://www.neoflash.com/myth/NEO_N64_Myth_Cart_Upgrade_Core_v1.1.rar

[the|Gamer]

Is this Fix for 16Kbit Games?

[Conle]

Dr.Neo the app says : "Failed to authenticate encrypted data".
 

Edit i have tried both with 17pin & 8pin cable. Still no luck.
Maybe it isn't supposed to authenticate the data?

Im using windows 7 x64 by the way.

[ChillyWilly]

The 8 pin cable is the one to use - the 17 pin one is for the SNES cart.

I get the ID code of the target device doesn't match the DAT file.

[Dr.neo]

Is this Fix for 16Kbit Games?

yes.

and i'll upload photo to show how to connect.

[Conle]

The 8 pin cable is the one to use - the 17 pin one is for the SNES cart.

I get the ID code of the target device doesn't match the DAT file.

Yeah that's what it shows now.
Maybe the app is missing a .DAT file or something?

[ChillyWilly]

Cable was upside down. If you have the cable in correctly on both sides, the LED on the N64 Myth will light up.

It works fine as long as the cable is right.

[Link83]

I have upgraded my Neo N64 Myth Cart and 16Kbit EEPROM saves appear to be fixed!   Thanks so much Dr.neo  

I have tested Perfect Dark and the save file now works fine, also Neon Genesis Evangelon now boots fine as well.

I have not yet tested if you can now backup and restore saves correctly with Neo2 Ultra Menu - that was the only other problem I noticed before. I will test and update soon.

Tip - When upgrading insert the flex cable with the white side facing upwards and be careful not to bend the NDP flex cable too much. Also when inserting the ends hold the little stiff card bit near the end of the flex cable, not the flexible part.

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Dr.neo, could I also just ask what the SRAM 512Kb and SRAM 1Mb saves sizes are for in the Neo2 Ultra Menu? To the best of my knowledge there were only four types of cartridge saves used on N64 games:-

EEPROM 4Kbit
EEPROM 16Kbit
SRAM 256Kbit
Flash 1Mbit

So I just wondered what the SRAM 512Kb and SRAM 1Mb options were for in Neo2 Ultra Menu?

Thanks for all your hard work Dr.neo

[Conle]

Okay now it flashes the cart.

But , on x64 it doesn't work. Im doing it via windows xp 32bit sp3.
And the menu has totally different color(its pink).

[ChillyWilly]

Okay now it flashes the cart.

But , on x64 it doesn't work. Im doing it via windows xp 32bit sp3.
And the menu has totally different color(its pink).

The color indicates whether it finds the USB programmer or not.

Well, the cart is updated and still works. That's always a good sign. Now to get cracking on that menu...
 

[Conle]

The color indicates whether it finds the USB programmer or not.

Yes i guess so.On windows 7 x64 the menu is like its "inactive" with only the start button active.

Anyway , time to test some 16Kb sram games 

[the|Gamer]

Hi,
I updated too!
Works very well with my netbook (Dell Mini 10) and Windows 7 x86

[Dr.neo]

here is the connecting photo

[Dr.neo]

SRAM 512Kb and SRAM 1Mb is for future purpose, not now 

[Conle]

Great work! Now Perfect dark is play-able