The Official ModRetro Forums!

BURD
It is currently Thu Sep 09, 2010 5:44 am

All times are UTC - 8 hours




Registered Users do not see these Advertisements.


Post new topic Reply to topic  [ 17 posts ]  Go to page 1, 2  Next
Author Message
 Post subject: Trace latency on the N64
PostPosted: Wed Jun 16, 2010 11:18 pm 
Offline
Co-founder of ModRetro
Co-founder of ModRetro
User avatar

Joined: Tue Jun 02, 2009 1:51 pm
Posts: 4043
Location: βeta's piquant, dense figure.
Karma: 31

Portables: I forgot. Yeah.
Does anyone know for sure it is exists or not?

Electric_rain and I were chatting last night and we couldn't come up with much, but I did find a few articles and junk:

Clock speed of n64's ram: 500MHz

http://www.physicsforums.com/showthread.php?t=206271

http://blogs.mentor.com/hyperblog/blog/tag/trace-delay/

http://www.technick.net/public/code/cp_ ... microstrip

I figure Ram would be the most sensitive out of everything, so I was working off of there.

If anyone can offer any input that could help then please let me know.

We did throw around a few things, from what I can tell having shorter traces would not cause problems.

SS

_________________
ImageImage


Top
 Profile  
 

Registered Users do not see these Advertisements.

 Post subject: Re: Trace latency on the N64
PostPosted: Thu Jun 17, 2010 6:58 am 
Offline
Co-founder of ModRetro
Co-founder of ModRetro
User avatar

Joined: Tue Jun 02, 2009 1:51 pm
Posts: 4043
Location: βeta's piquant, dense figure.
Karma: 31

Portables: I forgot. Yeah.
http://www.youtube.com/watch?v=CCizUqujueQ

That video had no real use until now.

Maybe I'm just retarded.

Maybe.

Beta and I say this video proves there is no latency on the chips.

SS

_________________
ImageImage


Top
 Profile  
 
 Post subject: Re: Trace latency on the N64
PostPosted: Thu Jun 17, 2010 7:06 am 
Offline
He who mods in thy basement.
User avatar

Joined: Sat Jun 13, 2009 6:59 pm
Posts: 2518
Location: Michigan
Karma: 2
I say connect the exp. pak directly to the RCP and cut off the whole section of mobo that once had the RAM chips. (and rewire some flux.)

And no, latency is not an issue on the N64 RAM because they designed the system to potentially have RAM upgrades, thus extending traces.

_________________
Cheers,
Basement_Modder
_________________
I can build a pretty nice portable in about 2-3 weeks. Shoot me a pm if you want a commission done.
kos wrote:
ToastBucket wrote:
Why would you strip the board of it's parts?

idk i thought i had to because in the first diagram in theis thread i got it from somewhere else and all the parts of the board are missing


Top
 Profile  
 
 Post subject: Re: Trace latency on the N64
PostPosted: Thu Jun 17, 2010 7:15 am 
Offline

Joined: Wed Dec 31, 1969 3:59 pm
Posts: 1290
Karma: -26
Given the fairly slow nature of n64 RAM and that of other systems of that age, it shouldn't matter much until you get into lengths greater than like 2-3 inches or so - the main problem there is signal attenuation and data noise, though.


Top
 Profile  
 
 Post subject: Re: Trace latency on the N64
PostPosted: Thu Jun 17, 2010 7:19 am 
Offline
He who mods in thy basement.
User avatar

Joined: Sat Jun 13, 2009 6:59 pm
Posts: 2518
Location: Michigan
Karma: 2
We're discussing making it shorter, not longer.

Also, 2-3" would not work. Unless you mean 2-3" from the RCP and not from the original solder points.

_________________
Cheers,
Basement_Modder
_________________
I can build a pretty nice portable in about 2-3 weeks. Shoot me a pm if you want a commission done.
kos wrote:
ToastBucket wrote:
Why would you strip the board of it's parts?

idk i thought i had to because in the first diagram in theis thread i got it from somewhere else and all the parts of the board are missing


Top
 Profile  
 
 Post subject: Re: Trace latency on the N64
PostPosted: Thu Jun 17, 2010 2:54 pm 
Offline
Resident Troll
User avatar

Joined: Mon Jun 15, 2009 5:11 pm
Posts: 2707
Location: Canada, to the North
Karma: -13
Didn't Bac hit a clock trace and screw up his board? If that's true, methinks that would be the only hypersensitive trace.

_________________
Steam ID: XTChrisTX Gamertag: XCVGVCX YouTube: XCVGVCX

Wordpress Blog/Site YAP64/2 Mini Arcade Project


Top
 Profile  
 
 Post subject: Re: Trace latency on the N64
PostPosted: Thu Jun 17, 2010 3:22 pm 
Offline
Mr. L, Extraordinary portablizer
Mr. L, Extraordinary portablizer
User avatar

Joined: Tue Jun 30, 2009 8:41 pm
Posts: 1042
Location: Sitting on my pile of authentic minnesota dirt
Karma: 6
This would be something to ask kibble about from the benheck forums, if he's around that is. He should know if there's any latency.

_________________
ImageImageImageImage5%
Twilight Wolf wrote:
Do you enjoy W+M1? :stare:


Top
 Profile  
 
 Post subject: Re: Trace latency on the N64
PostPosted: Thu Jun 17, 2010 5:31 pm 
Offline
He who mods in thy basement.
User avatar

Joined: Sat Jun 13, 2009 6:59 pm
Posts: 2518
Location: Michigan
Karma: 2
XCVG wrote:
Didn't Bac hit a clock trace and screw up his board? If that's true, methinks that would be the only hypersensitive trace.

That was all flux. He just fried his board and said that's what did it.

_________________
Cheers,
Basement_Modder
_________________
I can build a pretty nice portable in about 2-3 weeks. Shoot me a pm if you want a commission done.
kos wrote:
ToastBucket wrote:
Why would you strip the board of it's parts?

idk i thought i had to because in the first diagram in theis thread i got it from somewhere else and all the parts of the board are missing


Top
 Profile  
 
 Post subject: Re: Trace latency on the N64
PostPosted: Thu Jun 17, 2010 6:23 pm 
Offline
CFO
CFO
User avatar

Joined: Sun Jun 07, 2009 1:17 pm
Posts: 1577
Karma: 21
I am the closest thing to an Electrical Engineer on ModRetro.
The latency caused by traces on the N64's PCB are negligible the vast majority of the time.
There is no reason for RAM to be any more "sensitive" to this latency than anything else.
99% of the failures and difficulties people have had in the past regarding this matter were NOT related to Trace Latency.

NOW, the semi-bad news.
The way the CPU and RCP talk is, in my opinion, a bit bizarre.
Understand, that the latency caused by traces really ought not effect even this.
But, variance in length could.
Between these two, pretty much the fastest communication that takes place outside of the CPU or RCP occurs.
But listen, if you are halfway decent at soldering, this should NOT be a problem.
Just be careful and kind to it.

_________________
(Bacon|Web)master.


Top
 Profile  
 
 Post subject: Re: Trace latency on the N64
PostPosted: Thu Jun 17, 2010 6:28 pm 
Offline
He who mods in thy basement.
User avatar

Joined: Sat Jun 13, 2009 6:59 pm
Posts: 2518
Location: Michigan
Karma: 2
Imma be a CE or EE does that count? :P

_________________
Cheers,
Basement_Modder
_________________
I can build a pretty nice portable in about 2-3 weeks. Shoot me a pm if you want a commission done.
kos wrote:
ToastBucket wrote:
Why would you strip the board of it's parts?

idk i thought i had to because in the first diagram in theis thread i got it from somewhere else and all the parts of the board are missing


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 17 posts ]  Go to page 1, 2  Next

Registered Users do not see these Advertisements.



All times are UTC - 8 hours


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
Jump to:  
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group
Karma functions powered by Karma MOD © 2007, 2009 m157y

ModRetro sees tens of thousands of unique visitors every month, and grows more every day.
If you'd like your Ads to be seen on ModRetro, send a PM to Jleemero for info.