Blizzard PPC trouble

[AF-Domains.net]

I have just got a revisoin 1B a1200 motherboard and like on all of the ones before it I keep on getting either red, yellow or no screen what could the problem be.

The PPC card is made by phase 5.

[lempkee]

hey , this one is pretty easy to fix.

we just discussed this problem yesterday on this board!

check the ESCOM amiga1200 dont work on ppc  thread.

in short all u need to do is , power the bppc directly from your psu! , same goes for the fan on it!

cheers

[PiR]

Hi

I have PPC card from phase5 and I can tell you one thing:
It is always power-hungry.

The problem is not in PSU, as I have strong one, and changing it didn't change my results. The problem is that mobo was not designed for so big power consumption and voltage dropping is so big that at the end of the path, where CPUs and SIMMs are attached, it dropps the critical level, where CPU rejects to work and memory starts to forget things.

Things are getting more complicated when you realize that the power is consumption can change then chips activity change. So it may happen, that if several chips are more in the same time then the voltage dropping is bigger and CPU cannot stand it. But if they work one after another CPU can survive...

In my case I have 5,1V on '5V' line out of PSU, while I checked it sometimes dropps to 4,5V closer to expansion slot...

Good luck

[AF-Domains.net]

The motherboard I have is made by commodore and occasionally I can get it to boot up but with checksum errors.

[lempkee]

yes by commodore or escom , still SAME , why i told u to read the escom thread as its all pretty well explained there..

some motherboards doesnt need the ppc to be powered seperately but nearly all do!..

i bet my 2cent on this that you need to power it directly...

[Ryu]

just feed your PPC with + and -5v through the fan connector directly from the PSU making sure the voltage wont drop accross the edge connector of the A1200 motherboard. Im lucky in that my 1D1 motherboard has good enough traces to feed a stedy 5v through the edge connector to my PPC, but my 1D4 motherboard needs the extra feed.

[lempkee]

ryu:and my 1D4 doesnt need extra feed , its weird , but its normal i guess...

[AF-Domains.net]

My motherboard is being powered from the main power connection and the one reserved for the floppy drive

[Ryu]

are you listening to what we are sugesting? feed the BPPC directly from the PSU, you can do this by taking the 5v line (red and black wires) from a power connector of the PSU to the BPPC's fan connector...

I personally would advise you to remove the feed you have on the floppy power connector... I personally belive the traces are too thin to feed power into the motherbaord there and you could do more damange than good, esspecially with the 12v line.

[AF-Domains.net]

Does it matter which way round the red and black wire goes on the bppc board

[PiR]

lempkee wrote:
ryu:and my 1D4 doesnt need extra feed , its weird , but its normal i guess...

Not as weird as may look like.
I remember I've read somewhere here that BPPC and BVision boards seem to work at the different temperature, as reported by several people around. This can mean that they can have different power consumption. So seems to depend more on the question if you have strong MoBo together with low power consuming PPC, than just simple MoBo problem.

Good luck

[amigamad]

I personally would advise you to remove the feed you have on the floppy power connector... I personally belive the traces are too thin to feed power into the motherbaord there and you could do more damange than good, esspecially with the 12v line.

Thats how my eyetech case is powering my a1200 been working fine since 96/97

[lempkee]

af-dominans: yes it matter ALOT , 1 wrong wire and your ppc will die instantly..

act with caution and do as we told you, check the thread called ESCOM AMIGA 1200 bla bla ..

all info needed should be there as i did this to my friends mother board yesterday!

i simply doesnt see the reason why i should repeat all , just a few clicks away if u do a search in the hardware forum here on amiga.org.

cheers and good luck

[lempkee]

http://www.amiga.org/forums/showthread.php?t=6264


thats the link to the forum thread about the same problem you have, and you will get some more tips aswell...

check it out.

[JurassicCamper]

I NEVER had any trouble with my BPPC / BVISION on an unfixed 1d4 AT mobo. NEVER period and didnt have to attach an extra supply to the mobo.
Works for some dunno why... mine was even clocked to 280Mhz with a 66Mhz 060.
This was in a Infinitiv Zorro2 Tower as well with powerflyer, multiface 3, Ethernet, Whippet serial etc etc.
Never experienced any of the timing problems people witter on about either.