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Re: ATX -> Apple2e powersupply adaption.

Subject: Re: ATX -> Apple2e powersupply adaption.
From: "David Wilson" <mcs6502@gmail.com>
Date: 9 Jun 2006 16:00:22 -0700
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Mark McDougall wrote:
> So if you're pulling 200mA on the -5V rail, then  you'll need to dissipate 1.4W in heat.

According to the IIe Reference Manual:

1) The Power Supply can supply 250mA at -5V
2) A total of 200mA is available for cards plugged into the 7 expansion
slots
3) -5V is used on the IIe motherboard only twice that I can see:
UA11 MM741 cassette input amplifier
Q1/VA1 video output
4) -5V is also available on the 4 pin RF modulator header

[The Super Serial card does not use -5V, only +5V and +/-12V.]

So unless you have a card that needs -5V, the 7905 will need to supply
no more than 50mA.

References:
- ATX -> Apple2e powersupply adaption.
  - From: "General_Failure" <tristan.mumford@gmail.com>
- Re: ATX -> Apple2e powersupply adaption.
  - From: "David Wilson" <mcs6502@gmail.com>
- Re: ATX -> Apple2e powersupply adaption.
  - From: "General_Failure" <tristan.mumford@gmail.com>
- Re: ATX -> Apple2e powersupply adaption.
  - From: Mark McDougall <msmcdoug@no.spam.iinet>

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