phatg20

I know this isnt for the SR20, but it is for the KA24DE, that some of the 240 guys have had.. Mabey this info could bring some insight, into how JWT programs SR20's

[links deleted]


Who know's no one may find this usefull...

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http://www.phatg20.net
http://www.nissantech.info

 

JayLew

Do you know what type of program this is? Turbo/NA?

Not because Im going to use JWT's info......but because it will give me a good base to work with for making 16bit DB's (Im planning on buying the Transtronic Pocket Programmer with the 40 pin adapter).

Plus, if the code is actually JWT's, then it will also give us begginers a good modded file to study from and compare to the stock KA24DE .bin file. Same theory as the guy on cherrypicker who posted the stock Z bin and tuned Z bin.

EDIT: Anyone know if the statement that the stock PROM on a KA24DE is a 44pin plcc?

Also, JDR carry's all of the parts except for M74HC173B1.

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Jason

1992 240SX
2006 WRX (wingless non TR)

Calum

Yes thats a JWT rom, it says it right in the rom:

"CUSTOM PROGRAM BY CLARK STEPPLER AND JIM WOLF JIM WOLF RACING EL CAJON , CA."

...and thats not cool, thats straight up stealing. Tune your own rom, if you want to share it then that's your business, but pirating other peoples work is wrong. If your going to just turn this into a big pirate swap meet then this forum is a waste of time. Theres nothing wrong with reverse engineering something to figure out how it works, but at least do them the credit of actually _buying_ the damn thing first.

Second, why bother building a 16-bit DB? There are no 16-bit dip package flash roms, if there were I would have made my DB 16-bit. Thats not a big deal for JWT, they don't ever have to reburn the rom, but for someone trying different stuff it sucks. I've posted the scematic for my basic board a long time ago ( http://web.utk.edu/~cjohns32/roms/B13_basic_v0.pdf ), if you still want to make your own 16-bit DB it doesn't take much brainpower to figure out how just from that.

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All posts by Calum in this thread are copyrighted by Calum, and cannot be edited, deleted, or copied without his express permission.
calum@calumsult.com

JayLew

Well Im far from making any type of board, Ive just been reading this stuff untill I think Im capable...... Right now Im just trying to translate all the info, such as, why capacitors/resistors are placed where there placed. I dont want to just copy somebody's design just because they say "yep, thats where your supposed to put it". I want to know why its going where its going.

I have copies of your board (which I got about a month ago), JWT's, and Badbiki's. Im just using them for reference...ie...seeing what they have in common....JWT's obviously is not as user friendly.

Ive already order two ZIF's and two AT29C256's<----(I read that the AT29's are out of production, so I bought 2 now, instead of later), which means my initial board will be an 8bit odd/even set up....basically because Im going to need to erase them all the time untill I figure this stuff out....but thats still way off.

Your right though, this stuff is JWT's "intelectual property". Posting it probably wasnt the smartest thing to do.

Calum

If your designing your own board use my schematic, its about as simple as it gets. The caps on each design are just filter caps, they don't actually do anything nor do you really need them, they're just good design practice. Grid's daughterboards don't use them and they work fine, but as an electrical engineer I call that asking for trouble when they only cost you a dime or two extra to tack them on. So essentially you've just got three parts to work with (of which 2 are the same thing), and the 40-pin header. Download the datasheets off digikey for the 2 parts and walk through them. It doesn't take very long to figure out whats going on.

JWTs board isn't that complicated either, they've just added something for some functionality, but I won't give away what they're doing. The resistors btw are just current limiters, they're not important.

If you've got any specific questions about my boards or designs feel free to ask, there are lots of neat tricks you can do using that as a starting point.

JayLew

Thanks for the help. Thats one of the things that Ive noticed is that all of you are using 1 or 2 parts that the other doesnt (mostly caps and resistors vary from board to board, which was confusing me.).

The one part in peticular that all of you are using is the NAND Gate 74HC00. Which from what Ive read is a logic controller? It basically works as an infromation filter right?

Another question about your board. I think you said with an Odd/Even set up half of each chip is wasted. Does that mean you cant hold multiple map's on an Odd/Even board?

sr20boston

I removed the links to those files. Posting JWT programs will not be allowed!!