Blizzard 1220 4mb

[Snoozy]

Hi ppl,
 
I have this card which i bought to fit to my 2nd a1200 (mobo 1d4) and despite flush fitting i get a yellow screen, which then turns black. If i count the blinks of the green power light there are 9 or 10.
 
I've checked all the usual suspects like keeping the card away from metal shielding when fitted and i've cleaned the contacts on both the mobo and the blizzard 1220. There are no jumpers fitted on the card and i see there are options A,B,C,D although C,D look blocked off. Do i need to fit a jumper over A or B?
 
Is there any thing else i am missing?
 
(I've been assured the card works ok and seen a screen with it working)
 
Argh! :cry:

[Snoozy]

Hi thanks, but i'm already familiar with those other postings from my previous google search.
 
The 1200 powers up fine without the blizzard and i am using a 500 psu.
 
I'm guessing i am having either connectivity probs between the blizzard and the mobo, or there are ram probs on the blizzard. If i look at some of the trace tracks on the back of the blizzard there are a couple i can't convince myself look ok..
 
Is there any way to clean up the tracks on the back of a expansion board? alcohol wipes? :confused:

[Snoozy]

Hey, thanks for ur replies.  Incidentally i am on kick 3.0 roms.
 
Does anybody else own this card and have found it tempermental on initial setup? :confused:
 
What is the best way of cleaning the contacts inside the card and ensuring the grippers are gripping on the mobo?
 
Is there a crystal somewhere on the card that i need to check is properly seated?

[Snoozy]

I think i am having some success with getting this card to work via using a Jumper over option B of the card.
 
Is this something to do with running between 14mhz or 28mhz?
 
Would this make sense to ppl?

[Snoozy]

hi, yes it does have the empty socket but for some reason this board is only working if i have the jumper cover over B.
 
I can't explain this.

[Snoozy]

ahh ok thanks daedalus i understand this now...so if i'm using the jumper over B does this mean i'm only using the ram on the card and not the cpu on the card??
 
Would there be any benefit for me to get the crystal ie. using the blizzard cpu?? (is the crystal aka fpu??)
 
ah, i see jacks legacy (ebay) are selling them in germany for £8, i think i'll buy one - should make better use of the blizzard?

[Snoozy]

Can somebody tells me how this fpu fits in the socket on the pic above, when this chip
 
http://www.ebay.de/itm/68882-CoPro-PLCC-FPU-Commodore-Amiga-Blizzard-Atari-/220846013303?pt=Klassische_Computer&hash=item336b72bb77
 
has many legs and the socket on the blizzard has just 4 holes?

[Snoozy]

Hi yep got it, thanks for clearing that up paul.
 
So i look at my card i have an fpu m888.. 33, so i suppose that's 33mhz. If i can get hold of an oscillator it needs to be between 33-40mhz and it will have 4 legs to fit in that socket ? The crystal is within the oscillator? (does more crystals mean more time in the crystal dome :roflmao:)
 
I am asking jacks legacy to see if they can source me one, as all they have is 50mhz, i suppose my next option would be farnell?

[Snoozy]

Hi paul, yep thanks I ordered an 8 dimm 33mhz crystal and socket from amigakit couple of days ago, when fitting the writing on the crystal needs to be upright? Is it plug and play or will it need soldering in?

[Snoozy]

Hey thanks daedalus, so the oscillator is fitted into its 8 dimm socket that will come with it. Does it matter which way it is fitted in this socket?

And then this socket/crystal combo is critically orientated into the empty socket as shown above. And then the card is running at 33mhz (and with the add4 modulle) at pretty much its full potential?

[Snoozy]

Ok so what is the point of the 8 dil crystal sockets that amigakit sell?

Do you think the crystal upgrade is worthwhile?

[Snoozy]

ok thanks ,
 
so i'm waiting for the 33mhz crystal to arrive....
 
in the mean time these crystals are available:
 
http://www.amibay.com/showthread.php?t=19827
 
do you think i should get one of these 40mhz crystals as i think the blizzard 1220 can take upto 40mhz crystal oscillators.
 
Can you use a 40mhz crystal with a 33mhz fpu? Is this overclocking?
 
(incidentally i managed to track down the add4 for £29 last week so will fit that when it arrives - probably knocking out my pcmcia at the same time, ah well)

[Snoozy]

Thank you Daedalus and Paul1981 for your help, blue smoke and burnt chips are best left in the mistakes of the kitchen
 
So i will keep with the 33mhz, if it goes wrong and i get blue smoke i may record it on my digi-cam and place it on youtube as i'm sure it would give some of you ppl a laugh :roflmao:
 
I will don my surgeons mask and attempt the transplant of the oscillator later in the week

[Snoozy]

So I do need the 8 dil housing after all :roflmao: So does it matter which way the crystal is placed in the 8 dil socket?
 
The 1220 (without crystal but with fpu) will not work on my 1200 unless i have the jumper cover over B. Jumpers C and D i can't really get to as they look semi-blocked off?!
 
So i am thinking when i install the crystal oscillator i will leave jumpers A and B open (or jumper cover over A?) and the card should work with fpu at 33mhz and cpu 28mhz, i don't think i can change jumpers C and D, if you look at the photo earlier in the thread are jumpers C and D also look partially blocked off?

[Snoozy]

hmmm TCMSLP, i don't think you've brought anything to the table with that comment