How to not burn a A1200 tower and PPC Board

[Daniele]

Hello Amigos,
I am waiting for a Tower case and I succeeded buying a Blizzard PPC 603e+ /160MHzes on ebay has been sold me without memory, now the problem is to to find a memory.
I only have 16 MB.
I have found a guy that has banquets of 128 MB and it told me in few words how to feed power to the the disc drive.. etc
Honestly  I have not understood .
I'm gonna paste you what told to me :

Hi again, when you use to tower then The guesses you macaws using to busboard and in that houses the Amiga board will get plenty of power. If not then you need to supply the A1200 board with power on both the power supply connector and also supply power to the floppy power connector. The have read on Amiga.org that burdens people fried their board by just using to BPPC and no extra power cable to the floppy power connector, even with only 16 Mb Ram.


Now I wonder me and I ask you (kindly if you answer me)

1) when the tower arrives to me I would like  tower up  1200 before without accelerator, woudl the PSU feed the motherboard and the floppy?

2) I am right if I test the accelerator board with 16MB before installing 128 MB that according to the seller would suck a lot of power on an Amiga 1200 desktop?

3) How can I feed Blizzard PPC 603e with the Tower?

4) What to do yo not "to fry" everything?
 

I am scaring!

Help Please!

Thanks    

:crazy:

[Karlos]

Assuming you just have the A1200 motherboard and the BlizzardPPC+RAM, you can ensure that enough power is fed into the system as follows:

Splice an original A1200 power cable to the Tower cases's AT/ATX Power supply. There are plenty of documents online describing how to do this.

In theory, you can connect the spliced 1200 power cable to the original power socket on the back of the A1200 and that is the end of it. However, the BPPC and up to 256MB of RAM can draw quite a lot of current, sometimes too much for the single connection above.

A solution to this is to basically use the A1200 motherboard floppy power connector to provide a second power feed. Instead of having your floppy power cable connected to it, you can connect a floppy power cable from the Tower case's PSU to this port making exactly sure you have connected it the right way round otherwise you will cross the 5V/12V rails and that will not smell nice at all.

Together, the two power feeds (original cable and floppy connector) ensure that enough current gets into the system without all of it having to go through a single route. This is how my 1200T is powered.

You might also consider getting a different cooler for the PPC card. The stock one is not so great.

[amazing]

intresting...maybe u could place some pictures of your wiring on here?

its handy for everyone

[amiga92570]

amigakit.com also sells an at to amiga power adapter if you do not wish to make your own. :-D

[Mad-Matt]

Do bare in mind that the extra power feed may not be neccessary with just the bppc.  Its when adding extras such as the bvision that extra power feed may be required.

so test without if unsure about messing with the floppy connector.

[Daniele]

I wanna only specify that the tower I have to use would be D-BOX 1200 MKII that I am waiting from AmigaKit!
Do I need more than the electricy already supllied by the default PSU?

thanks

[Mad-Matt]

assuming its still a 350w psu, it will be more then enough.