A1200 Mobo Timing Issues

BippyM · 24 May 2006, 19:23

Can someone tell me if a Rev 1a board has the timing issues that plague the 2b and 1d4 boards?

Does it work okay with an 040/ppc board and bvision?

ant512 · 24 May 2006, 20:48

1a has no problems with 040/060 CPUs. It's only the 2b and 1d.4 that have the bus timing fault.

BippyM · 24 May 2006, 20:50

cheers ant

keropi · 25 May 2006, 00:54

I have a 1d4, works fine with my 060 bppc, with a mtec1230, with a 1260/50 and with the RBM zorroII busboard, g-rex, piccoloSD64, picassoII, fastata1200... all my own hardware

ant512 · 25 May 2006, 15:10

Got 2 1d.4s, a 1b and a 2b. The 2b won't boot with either an Apollo 1260 or Blizzard 1260 fitted. One of the 1d.4s runs with the accelerators in but crashes every ten minutes. The other boards (bugfixed 1d.4 and 2b) exhibit no problems.

However, it seems to be down to luck at the end of the day. In short, the 2b and 1d.4 are the only motherboards likely to have problems with fast accelerators.

DoctorQ · 25 May 2006, 15:49

Quote:

Originally Posted by ant512

It's only the 2b and 1d.4 that have the bus timing fault.

Try running a BPPC 040 on a rev 1D1 motherboard. I couldn't get a stable system (would crash and lock up after random time, fastest lockup was after 10 seconds) before I did the timing fixes. After I have done the timing fixes it has run 100 % stable.

Unknown_K · 25 May 2006, 16:38

The fixes are just desoldering 2 resisters correct?

Bamiga2002 · 25 May 2006, 18:40

Quote:

Originally Posted by Unknown_K

The fixes are just desoldering 2 resisters correct?

Yep, that's the case with a 1d4 mobo. Read more here:
http://www.ianstedman.co.uk/Amiga/am..._mobo_fix.html

keropi · 25 May 2006, 18:52

should I do it??? the fix? I did not notice any probs on my zorroII/g-rex + bppc setup...

Bamiga2002 · 25 May 2006, 19:49

Quote:

Originally Posted by keropi

should I do it??? the fix? I did not notice any probs on my zorroII/g-rex + bppc setup...

Then there should be no particular reason to do it, just be happy with your system

24 May 2006, 19:23	#1
BippyM Global Moderator Join Date: Nov 2001 Location: Derby, UK Age: 48 Posts: 9,355	A1200 Mobo Timing Issues Can someone tell me if a Rev 1a board has the timing issues that plague the 2b and 1d4 boards? Does it work okay with an 040/ppc board and bvision?

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24 May 2006, 20:48	#2
ant512 Registered User Join Date: Dec 2002 Location: California Posts: 964	1a has no problems with 040/060 CPUs. It's only the 2b and 1d.4 that have the bus timing fault.

24 May 2006, 20:50	#3
BippyM Global Moderator Join Date: Nov 2001 Location: Derby, UK Age: 48 Posts: 9,355	cheers ant

25 May 2006, 00:54	#4
keropi . Join Date: Oct 2004 Location: Ioannina/Greece Posts: 5,040	I have a 1d4, works fine with my 060 bppc, with a mtec1230, with a 1260/50 and with the RBM zorroII busboard, g-rex, piccoloSD64, picassoII, fastata1200... all my own hardware

25 May 2006, 15:10	#5
ant512 Registered User Join Date: Dec 2002 Location: California Posts: 964	Got 2 1d.4s, a 1b and a 2b. The 2b won't boot with either an Apollo 1260 or Blizzard 1260 fitted. One of the 1d.4s runs with the accelerators in but crashes every ten minutes. The other boards (bugfixed 1d.4 and 2b) exhibit no problems. However, it seems to be down to luck at the end of the day. In short, the 2b and 1d.4 are the only motherboards likely to have problems with fast accelerators.

25 May 2006, 16:38	#7
Unknown_K Registered User Join Date: May 2002 Location: Ohio/USA Age: 55 Posts: 1,380	The fixes are just desoldering 2 resisters correct?

25 May 2006, 18:52	#9
keropi . Join Date: Oct 2004 Location: Ioannina/Greece Posts: 5,040	should I do it??? the fix? I did not notice any probs on my zorroII/g-rex + bppc setup...

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