68kMLA Classic Interface
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| Click here to select a new forum. | | ll FX | Posted by: Classic Mac on 2010-02-20 21:04:57
Is the ROM card by the speaker?
If the ROM is soldered to the board, is it by the batteries?
Why does it have two batteries?
I am going by 'fuzzy' pictures, so it is hard to tell, having never seen one.
| Posted by: Tempest on 2010-02-20 22:37:56
It's towards the front center and the speaker is towards front right IIRC. So sort of.
No it's a memory board like socket.
No clue. I know that unless both are good it won't turn on though.
Tempest
| Posted by: Dennis Nedry on 2010-02-21 17:47:43
Why does it have two batteries? http://home.earthlink.net/~gamba2/images/macIIfxsch.GIF
Each battery is 3.6V. I'm not exactly sure from just glancing why they designed it this way, but it appears that this voltage is not high enough to turn on the power supply, so a second battery is added in series to bring it to 7.2V. D6 and D5 look to simply be there for a ~0.7V drop each, bringing 7.2V down to 5.8V.
Why they made it this way rather than scratch their heads for a while and reduce it to one battery is BAFFLING. At least the IIfx has battery holders, unlike the Mac II, which had soldered-on batteries!
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