English Amiga Board


Go Back   English Amiga Board > Support > support.Hardware

 
 
Thread Tools
Old 28 October 2010, 15:54   #1
DarrenHD
Registered User
 
Join Date: Aug 2008
Location: London / Canada
Posts: 686
RBM "onboard" Zorro backplane

I recently purchased from ebay the "Onboard" 4000 version for my RBM TowerHawk, to complete my A4000D "towerized" system.

After installing the board, inserting my Prometheus into a free Zorro slot, I found out that with two cards installed in the Prometheus PCI slots, it doesn't work properly.

One card is a Voodoo 3, which seems to work fine, but if I add a RTL 8029 NIC, it sometimes isn't recognized properly on the Prometheus. Sometimes it is, but I get 85-90% packet loss when doing pings, or sometimes the RTL 8029 NIC is not able to start/initialize.

I tried a bunch of different Zorro slots, and tried arranging the order of the cards in the Promtheus with no luck.

As a test I put my original C= A4000 zorro backplane in and then everything works fine, both Voodoo 3 and RTL 8029 NIC work together fine.

Anyone have any ideas?

Attached is a photo of the RBM "Onboard" 4000 before I installed the Prometheus card into an empty Zorro Slot.

DarrenHD is offline  
Old 28 October 2010, 16:39   #2
Jope
-
Jope's Avatar
 
Join Date: Jul 2003
Location: Helsinki / Finland
Age: 41
Posts: 8,698
My experiences with the RBM backplane are similar.. Artifacts and other weird bugs with rtg boards, boards must be in a certain order, ...

It is ok if you don't use Zorro III cards, else it sucks.
Jope is offline  
Old 28 October 2010, 16:42   #3
zipper
Registered User
 
Join Date: Mar 2004
Location: finland
Posts: 1,701
I went the "sure" way by spending on a X-Surf III - but what is your version of prm-rtl8029.device?
zipper is offline  
Old 28 October 2010, 18:16   #4
DarrenHD
Registered User
 
Join Date: Aug 2008
Location: London / Canada
Posts: 686
Quote:
Originally Posted by zipper View Post
I went the "sure" way by spending on a X-Surf III - but what is your version of prm-rtl8029.device?
My testing was done under OS 4.0 actually.

With RBM zorro board: problems

With C= backplane, everything was fine.

The RTL 8029 uses interrupts, voodoo 3 does not, so i think the RBM board has issues with interrupts.
DarrenHD is offline  
Old 28 October 2010, 18:51   #5
Jope
-
Jope's Avatar
 
Join Date: Jul 2003
Location: Helsinki / Finland
Age: 41
Posts: 8,698
It has crosstalk problems because it is not four layer like Zorro III backplanes should be.
Jope is offline  
Old 28 October 2010, 21:06   #6
DarrenHD
Registered User
 
Join Date: Aug 2008
Location: London / Canada
Posts: 686
Quote:
Originally Posted by Jope View Post
It has crosstalk problems because it is not four layer like Zorro III backplanes should be.
sigh...I guess it will remain on the shelf then. I've put back my C= backplane and everything is working OK.

It's too bad because my C= backplane is not orientated correctly (it's horizontal, not vertical) so I have to add extra support for it in the tower configuration.
DarrenHD is offline  
Old 28 October 2010, 22:46   #7
Loedown
Precious & fragile things

 
Join Date: Feb 2009
Location: Victoria, Australia
Posts: 1,946
Quote:
Originally Posted by Jope View Post
It has crosstalk problems because it is not four layer like Zorro III backplanes should be.
What stops you putting a piece of thin plastic above the pins on the underside and then a thin piece of copper sheeting off to a ground point to act as a groundplane, surely that should help against crosstalk?

Sorry in advance if this is an incorrect answer, my knowledge of RF stuff is closely approaching zero
Loedown is offline  
Old 28 October 2010, 23:13   #8
DarrenHD
Registered User
 
Join Date: Aug 2008
Location: London / Canada
Posts: 686
Quote:
Originally Posted by Loedown View Post
What stops you putting a piece of thin plastic above the pins on the underside and then a thin piece of copper sheeting off to a ground point to act as a groundplane, surely that should help against crosstalk?

Sorry in advance if this is an incorrect answer, my knowledge of RF stuff is closely approaching zero
What is stopping me is my negative knowledge on how to do that So my knowledge is less than your zero
DarrenHD is offline  
Old 29 October 2010, 07:14   #9
Jope
-
Jope's Avatar
 
Join Date: Jul 2003
Location: Helsinki / Finland
Age: 41
Posts: 8,698
Quote:
Originally Posted by Loedown View Post
What stops you putting a piece of thin plastic above the pins on the underside and then a thin piece of copper sheeting off to a ground point to act as a groundplane, surely that should help against crosstalk?
It doesn't sound plausible to me, however since the crosstalk happens between the top and bottom layer of the board.
Jope is offline  
Old 29 October 2010, 11:45   #10
Loedown
Precious & fragile things

 
Join Date: Feb 2009
Location: Victoria, Australia
Posts: 1,946
Quote:
Originally Posted by Jope View Post
It doesn't sound plausible to me, however since the crosstalk happens between the top and bottom layer of the board.
It's a cheap solution to try, cost you at most an hour and about $5 in parts.
Loedown is offline  
Old 29 October 2010, 14:28   #11
Jope
-
Jope's Avatar
 
Join Date: Jul 2003
Location: Helsinki / Finland
Age: 41
Posts: 8,698
Sure, if someone ends up trying it, please let us know.
Jope is offline  
 


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
"Reminder "Lincs Amiga User Group aka "LAG" Meet Sat 5th of January 2013" rockape News 4 30 January 2013 00:06
CD32 Image-Name-Bug: "...(bla)[!].zip" -> "...(bla)[" / "...[test].zip" -> "...[tes" cfTrio support.WinUAE 8 18 December 2012 16:31
PPC-Hardware: "Samantha" with PPC440 and ATI-onboard graphic? Paul News 3 09 September 2006 20:17
Problems with "Thespywholovedme", "Flood", "Shinobi" sareks support.Games 12 03 May 2006 14:52
OnBoard 1200 Ex V2.0 busboard for A1200 in RBM tower !! Effy MarketPlace 4 13 June 2005 23:16

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +2. The time now is 22:54.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Page generated in 0.09248 seconds with 15 queries