C64 PSU question

19 January 2003, 20:20

Having blown up my only PSU for both of my c64g and c64 units, trying to power an atari800xl with it, I found two c64c machines today with no psu. Now I'm in need of a replacement psu. Converted ATX ones will do if it is possible.

I'll also need an a590 psu in a few weeks, I know the connector on these units are similar. Is there a PSU unit that can power both 64s and a590?

Amiga1992 · 20 January 2003, 02:37

Quote:

Originally posted by Burseg
Having blown up my only PSU for both of my c64g and c64 units, trying to power an atari800xl with it

bowahahaah

Anyway, do not try to power up a 590 with a C64 brick. The pinouts surely are different and even if they were the same, I don't think teh old C64 brick would be able to power up a 590.

Never heard of modding a PC PSU for a C64, but it might be possible. Best thing you could do is buying a complete C64 set off eBay or something.

adolescent · 20 January 2003, 07:40

The A590 power supply is the same as the CD32 apparently. So, if you have one of those you're home free. As to wether it will work with a C64 power supply I doubt it.

THX1138 · 22 January 2003, 10:56

Quote:

The A590 power supply is the same as the CD32 apparently. So, if you have one of those you're home free. As to wether it will work with a C64 power supply I doubt it.

How sure are you of this as i have a A590 with no PSU but i do
have a CD32 with its PSU ?

Overdoc · 22 January 2003, 16:52

Yes, A-590 and CD-32 psu have the same voltage, but I think the A-590 psu has more power. My CD-32 has a A-590 psu and runs fine with it, but a CD-32 psu migeht be too weak to power the A-590 ?!?

But unfortunately you cannot power a C64 with a A-590 or CD-32 psu ! The C64 psu has 5V= and 9V~, whereas the A-590/CD-32 psu has 5V= and 12V=, like a PC psu. There are instructions on the net how to modify a PC psu for C64, but it is rather complicated because the ~current has to be generated !

THX1138 · 22 January 2003, 19:24

Thanks for the info.....CD32 PSU works fine on a A590

jmmijo · 23 January 2003, 16:31

If you do attempt to convert a PC power supply, try getting an older AT style so you don't have to muck about with the PWR_ON pin.

The other point is that you would want to make a circuit board with some voltage regulators on it and some nice decoupling capacitors otherwise you will not have stable input voltages and current regulation.

Here's some links I found:

http://www.hardwarebook.net/connecto.../c64power.html

and the search link:

http://www.google.com/search?hl=en&i...ower+supply%22

23 January 2003, 17:12

I've got a spare AT supply that has already been modified to work with Amigas. I'll directly cut & connect the connecter of my dead c64 psu tothis at psu and will try to get the 64 running. Will I blow the 64 this way?

Overdoc · 23 January 2003, 19:28

Yes, it might blow the C64 !!
The C64 needs 5V= and 9V~, but the AT psu supplies 5V= and 12V= ( instead of 9V~ !! ).
But afaik the 9V~ is used for the internal time and soundchip only. So you might get the C64 partly working by just using the 5V= output from the AT supply. Nevertheless, this would give problems with some games for sure and also you would miss the brilliant SID sound of the C64 !
Better get a C64 or C128 psu !

19 January 2003, 20:20	#1
oldpx Posts: n/a	C64 PSU question Having blown up my only PSU for both of my c64g and c64 units, trying to power an atari800xl with it, I found two c64c machines today with no psu. Now I'm in need of a replacement psu. Converted ATX ones will do if it is possible. I'll also need an a590 psu in a few weeks, I know the connector on these units are similar. Is there a PSU unit that can power both 64s and a590?

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20 January 2003, 07:40	#3
adolescent Powered by Motorola Join Date: Feb 2002 Location: Redondo Beach, CA Age: 52 Posts: 1,065	The A590 power supply is the same as the CD32 apparently. So, if you have one of those you're home free. As to wether it will work with a C64 power supply I doubt it.

22 January 2003, 16:52	#5
Overdoc Commodore Collector Join Date: Aug 2001 Location: Austria Age: 53 Posts: 944	Yes, A-590 and CD-32 psu have the same voltage, but I think the A-590 psu has more power. My CD-32 has a A-590 psu and runs fine with it, but a CD-32 psu migeht be too weak to power the A-590 ?!? But unfortunately you cannot power a C64 with a A-590 or CD-32 psu ! The C64 psu has 5V= and 9V~, whereas the A-590/CD-32 psu has 5V= and 12V=, like a PC psu. There are instructions on the net how to modify a PC psu for C64, but it is rather complicated because the ~current has to be generated !

22 January 2003, 19:24	#6
THX1138 Amiga Centurai Join Date: Nov 2002 Location: UK Posts: 526	Thanks for the info.....CD32 PSU works fine on a A590

23 January 2003, 16:31	#7
jmmijo Junior Member Join Date: Jan 2002 Location: PDX Age: 62 Posts: 2,395	If you do attempt to convert a PC power supply, try getting an older AT style so you don't have to muck about with the PWR_ON pin. The other point is that you would want to make a circuit board with some voltage regulators on it and some nice decoupling capacitors otherwise you will not have stable input voltages and current regulation. Here's some links I found: http://www.hardwarebook.net/connecto.../c64power.html and the search link: http://www.google.com/search?hl=en&i...ower+supply%22

23 January 2003, 17:12	#8
oldpx Posts: n/a	I've got a spare AT supply that has already been modified to work with Amigas. I'll directly cut & connect the connecter of my dead c64 psu tothis at psu and will try to get the 64 running. Will I blow the 64 this way?

23 January 2003, 19:28	#9
Overdoc Commodore Collector Join Date: Aug 2001 Location: Austria Age: 53 Posts: 944	Yes, it might blow the C64 !! The C64 needs 5V= and 9V~, but the AT psu supplies 5V= and 12V= ( instead of 9V~ !! ). But afaik the 9V~ is used for the internal time and soundchip only. So you might get the C64 partly working by just using the 5V= output from the AT supply. Nevertheless, this would give problems with some games for sure and also you would miss the brilliant SID sound of the C64 ! Better get a C64 or C128 psu !

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