does anyone have memory card schematics

stuntpenguin007 · Post by **stuntpenguin007** » Wed Apr 30, 2008 5:24 pm

I've been looking all over the internet for n64 memory card schematics and I can't find them. sorry If this has been asked a hundered times before. If it's of any use I'm using a 3rd party performance memory card. It has a winbond w24258s-70le eeprom which links directly to the pins.

Post by **marshallh** » Wed Apr 30, 2008 7:25 pm

What do you need them for? Almost all 3rd party memory paks are going to have a glop-top interface ASIC, and then a cheap EEPROM or flash ROM. You can usually deduce the schematic just by studying the traces.

timmeh87 · Post by **timmeh87** » Wed Apr 30, 2008 10:24 pm

If you are thinking of making a bigger memory card or something(?) then just buy a giant third-party one.

stuntpenguin007 · Post by **stuntpenguin007** » Thu May 01, 2008 2:58 pm

actually yes I was looking into making a bigger memory card but I was also wondering if there was some way to connect it to the computer too. I know theres the dex drive, but I was just wondering if it had similar pinouts to anything like sd cards. I was also trying to figure out If I could do something like the sd gecko on the gamecube that lets you plug sd cards into the memory card.

I don't really know why I want to do this, I guess I kind of have no life

HBN · Post by **HBN** » Thu May 01, 2008 4:49 pm

Thats a great idea...A few 2 gig SD's, and you'd be set for life.

vskid · Post by **vskid** » Thu May 01, 2008 5:06 pm

HBN wrote:Thats a great idea...A few 2 gig SD's, and you'd be set for life.

He is talking about the controller memory card. A 128MB card would probably hold a save from every N64 game that used it.

HBN · Post by **HBN** » Thu May 01, 2008 6:55 pm

vskid wrote:
HBN wrote:Thats a great idea...A few 2 gig SD's, and you'd be set for life.
He is talking about the controller memory card. A 128MB card would probably hold a save from every N64 game that used it.

Yes, I know. I'm daft, but not that daft.

stuntpenguin007 · Post by **stuntpenguin007** » Thu May 01, 2008 7:02 pm

well for the eeprom or flashrom on my memory card I came up with this, its a 28 pin...

http://pdf1.alldatasheet.co.kr/datashee ... -70LE.html

update: o.k. i've been doing some looking and....

the sram on an n64 memory card has

a0 - a14 --address inputs
I/01 - I/08 --data inputs/outputs
cs --chip select input
we --write enable input
oe --output enable input
vdd --power supply
vss --ground

adding up to 28 pins

a cf card is about as close as I can find that would work here's the specs

a0 - a10 need 4 more
I/01 - I/08 could this be "data bus" data bus is d0 -d15 its bi-directional idk what that is
cs possibly the equivalent of ce - card enable (input)
we - pin 36 of cf card
oe - pin 9 of cf card
no vdd but a couple of vcc (are they the same???)
vss a couple of these on cf card

here is the total list of all of the cf pins and what they are

cf card
1 vss
2 d3
3 d4
4 d5
5 d6
6 d7
7 /ce1 20
8 a10
9 /OE
10 a9
11 a8
12 a7
13 vcc 26 vss
14 a6
15 a5
16 a4
17 a3
18 a2
19 a1
20 a0
21 d0
22 d1
23 d2
24 /iois16
25 vss
26 vss
27 d11
28 d12
29 d13
30 d14
31 d15
32 /ce2
33 vss
34 /iord
35 /iowr
36 /we
37 /ireq
38 vcc
39 csel
40 nc
41 reset
42 /wait
43 /inpack
44 /reg
45 dasp
46 pdiag
47 d8
48 d9
49 d10
50 vss

stuntpenguin007 · Post by **stuntpenguin007** » Sat May 03, 2008 10:22 pm

o.k heres what I think the connections should be,

mem card cf

(pin) 10 to 20 (a0)
9 to 19 (a1)
8 to 18 (a2)
7 to 17 (a3)
6 to 16 (a4)
5 to 15 (a5)
4 to 14 (a6)
3 to 12 (a7)
25 to 11 (a8
24 to 10 (a9)
21 to 8 (a10)

11 to 22 (I/01)
12 to 23 (I/02)
13 to 2 (I/03)
15 to 3 (I/04)
16 to 4 (I/05)
17 to 5 (I/06)
18 to 6 (I/07)
19 to 47 (I/08

20 to 7 (CS)

27 to 36 (WE)

22 to 9 (OE)

28 to 38 (VDD)

14 to 50 (VSS)

sorry I dont have time to finish Ill edit my post later. oh and the points are based off of the link I posted earlier for the sram in the mem card and the cf card pinout i had in an earlier post.

problems so far...
14 address inputs on sram (a) only 10 on cf card
the I/0 type pins are replaced with d pins idk if that works
the CS is replaced with CE
VDD is linked with VCC
there are multiple combinations for VSS

I NEED TO CHECK WHICH SRAM THE MEM CARD USES OR ELSE THE WHOLE THING MIGHT BE WRONG, IT'S EITHER 28-PIN DIP OR 28-PIN TSOP

begins to twitch as he realizes that it was the tsop, not the dip and this all needs to be redone.

timmeh87 · Post by **timmeh87** » Sat May 03, 2008 11:12 pm

Before you do much soldering, you cant just hook a memory card up to where the sram was. Also memory cards dont use sram, and they probably do use a more complicated addressing scheme.

You could build a circuit with a microcontroller to handle things. maybe.

stuntpenguin007 · Post by **stuntpenguin007** » Thu Jul 31, 2008 11:03 am

I was wondering i you could use an n64 memory card with some small homebrew on it and somehow use gsupload to launch it off of the memory card via gameshark.

eurddrue · Post by **eurddrue** » Mon Aug 04, 2008 3:44 pm

In my general opinion I don't care about memory cards. WHat good games even need them? none of them that I can think of. Also just buy about 5 memory cards and your set. you don't need 2 gigs just for the few games that even need it.