ATX PSU conversion

[Doobrey]

redrumloa wrote:
I'd personally recomend verifying voltages with a multimeter.

I`d second that.. never ever go by cable colour alone...unless you can afford to replace your Amiga!
 The ATX spec recommends cable colour, but it`s just that...a recommendation.

 I just spent an exciting evening trying to get my spare A1200 working.. nothing but a black screen.I pushed and wiggled everything in sight, still no change..
 After the usual caffeine fix to reboot the brain, I dug out my multimeter and checked the PSU (standard beige CBM brick)... 3v on both the +12 and +5v rails !!
 Luckily I`d just got a MicroATX PSU..just needed a strip of terminal connectors and a toggle switch and I was back up and running in no time !

[Doobrey]

@Wolfe..
Well, to put it inside would mean there would have to be a case of some description !
 At the moment, it`s the A1200 mobo, Z4 busboard, Apollo 040, PCMCIA network card, silversurfer and a Hypercom3 just sitting on the bottom half of the A1200 case ..with wires running everywhere... :-o

 I`ll have to take some pics of it later..looks like a mad scientists lab here !

[Doobrey]

Wolfe wrote:
@Doobrey
Planning to use Zorro board or did you get it just for the extra Clock Ports?

 Well, I saw the Z4 on ebay and got it for £7 !
The seller said he couldn`t get it to work with his accelerator so it was sold for spares, but after some jumper swapping I`ve got it going fine ( Sorry if the seller is reading this!)
 If a decent (ie cheap) X-Surf or Ariadne II come up for sale, then I can ditch the PCMCIA netcard, as they`re too slow and CPU intensive.

 Anyway, I got it just to play around with...the extra clockports do give me some ideas...

 

[Doobrey]

@Patrik,
 I`ve got an A4000 040 with AriadneII, and an A1200 040 with a CN40BC (PCMCIA) card.
 A4000 gets around 750-800 kb/s over the network, whilst the A1200 gets 200-300kb/s and Workbench gets very unresponsive ,while it`s fine on the A4000

[Doobrey]

cycloid wrote:
however, on the subject of power supplies: does anyone know what -12v is actually for

Serial port and  audio need -12v.

[Doobrey]

patrik wrote:
@Doobrey:

What TCP/IP stacks are you using on those configurations?

 Genesis on both machines.. the wierd thing is that the AriadneII seems to generate more collisions than the Cnet, and then only when sending..receiving is fine.