Upgrading Blizzard 1240@33 to 060@66

[motorollin]

I've got a Blizzard 1240 @ 33MHz, and I'm thinking of doing something really scary and upgrading it to an 060. I want to go as high as I can, so I'm looking at a 66MHz chip. I'm after some advice on what I need and how to do it! I'm guessing I need these:

68060 66MHz CPU
66MHz Crystal Oscillator

Do they look ok? I don't know what voltage the board is at the moment. The 060 chip I linked above is 3.3v, but I don't know if this matches the board. Can I just replace the 040 with the 060?

I'd also like a CPU socket as I don't want to solder the 060 directly. Any thoughts?

--
moto

[Robert17]

You'd need a voltage regulator, since the 040 uses 5volts, and the 060 is 3.3v, not sure what is needed specifically though..

Robert

[motorollin]

Sounds extremely complicated  :-?

Are they pin compatible?

--
moto

[adolescent]

You change a jumper on the board to change voltage.  So, no voltage regulator needed.  Search this board for more information, user kas1e did this recently using a socket from a PC motherboard.

[motorollin]

Cool! I'll take the card out tomorrow and have a look for the voltage jumper. I take it the two chips have the same pin configuration and number of pins?

--
moto

[adolescent]

No, the chips are very different configurations, and number of pins.  And, to make it worse the BlizzardPPC has no CPU socket.  But, since the board is designed for 040 and 060 all of the lines are there.

Here's the post.  (Read Mugo's message there.  Also, kas1e is on here very often so he can probably help)

http://www.amiga.org/forums/showthread.php?t=14501

[hppacito]

Both chips have a similar PGA pinout, but the 060 has some more pins in the rectangular hole that the PGA forms. You will have to remove the solder from the inner holes also. I recommend you to have a look at some boards in the BBofAH to see the difference (Blizzard 1240 and 1260 illustrate clearly this). But to be really sure, download the manuals from freescale site. That sould clear all doubts.

[Brian]

The B1240/1260 uses the same print but with at least one important difference, the voltage regulator. The 060 will fry if you try to supply it with 5V as the 040 is running on, it needs its 3.3V.

Also the 060 CPU you're linking to is an EC model. I belive 060/60 is tops for a FULL version so get that, should be fairly safe to overclock it to 66Mhz.

[xaccrocheur]

Here is a (french) article  about doing it step by step. Mind you, it's really not for the faint of heart. And here, we install a 50MHz 060.
It involves desoldering of the 040, then solder a socket with one ore row of pins and then, the real fun begins. 040 and 060 are different in at least two details : the voltage and the clock signal. Anyway, here is the summary of the operations. I can translate for you if you don't speak french, (witch is of no use at all in computers)

Les modifications effectuées :

    * Le changement du support 040 par un support 68060 (une rangée de plus...).
    * Ajout du module d'alimentation 3.3 V - LT1585 LM 3.3 V cms.
    * Ajout des diodes en référence : 3x 1N4001 (cms ou standard).
    * Changement de position du jumper d'alimentation.
    * Déplacement de la diode pour l'alimentation du module (à côté de la batterie).
    * Ajout d'une résistance de 330 Ohms (cms).
    * Déplacement du jumper (côté oscillateur).
    * Changement d'oscillateur (mise sur support) 50 MHz.

Les pièces requises :

    * Un support 68060 (le mien coûte 50 FF, environ 8 Euros).
    * 3 diodes 1N4001 (si possible cms).
    * Une résistance cms 330 Ohms.
    * Un support pour CI 8 ou 14 broches suivant l'oscillateur 50 MHz que l'on a un oscillateur 50 MHz.
    * Un 68060 ! .

Conseil : un radiateur et un ventilateur donneront une stabilité parfaite à la 1260.

[motorollin]

Hi Brian, thanks for the info. So I should get this chip and this oscillator?

As for voltage, I need to check for the voltage selection jumper. Assuming I can change the voltage, am I right in thinking the new chip and oscillator will drop right in and work?

I've also found these sockets. Any idea if they will work with the 060?

Cheers

--
moto

--EDIT
Thanks xaccrocheur, I'll have a look at that article. My card is not a PPC, I don't know if that makes a difference?

[motorollin]

I've just had a look at the article xaccrocheur posted and it all looks far too difficult. I find electronic projects very difficult and the risk of destroying my 1240 is just too great. For that reason, I have decided to sell the 1240 and shell out for a 1260. I can't really afford the difference, but hey it's Christmas and I deserve a present  :-)


eBay auction for my Blizzard 1240


--
moto