Conversation

foone🏳️‍⚧️
@Foone
It's Applesauce Upgrade Day. Here's my Applesauce. It's the first iteration, with one upgrade, the Revision 1 board. This lets it support more power to work with 3.5" disks along with the original 5.25" drives
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foone🏳️‍⚧️
@Foone
It's the deluxe model, and it has the 20-pin IDC port, DB-19 port, unlabeled sync sensor port, and the labeled-by-me power connector
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foone🏳️‍⚧️
@Foone
So inside you can see that most of the smarts are on a little floating board... of a suspicious form factor.
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foone🏳️‍⚧️
@Foone
This over here is an LVXC3245 octal transceiver. It can convert between 3v and 5v buses at high speeds
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foone🏳️‍⚧️
@Foone
So the main part of the upgrade is a new motherboard (on the left) You can see it's quite similar, with some rearranged power supply circuitry being the biggest obvious difference
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foone🏳️‍⚧️
@Foone
Close up on the power supply section. More caps, more inductors, fewer chips. The Max636 remains, but the two linear regulators have been replaced
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foone🏳️‍⚧️
@Foone
And this is a LM2576SX-5.0 3-amp 5-volage switching regulator. (not linear, so we need less heat dissipation)
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foone🏳️‍⚧️
@Foone
and there's no 12v supply at all anymore: unlike revisions 0 and 1 which used a 16v input, this uses a 12v input and therefore doesn't have to generate a 12v output itself
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foone🏳️‍⚧️
@Foone
So the next part to install is the new rear bracket. It's now got a 34-pin IDC connector so you can attach PC drives
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foone🏳️‍⚧️
@Foone
Hmm. There seems to be a minor problem: I've got the little laser-cut panel for the front part, but not one for the back part?
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foone🏳️‍⚧️
@Foone
yep, the upgrade kit listed on the website does show a new plastic backplate there. I'm gonna have to go check I didn't accidentally toss it out!
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foone🏳️‍⚧️
@Foone
Anyway the final part of the kit is this adapter. This plugs into the 20-pin Apple II port and extracts 5v and 12v, so you can run PC drives off the Applesuace without needing an external power supply for just the drive.
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foone🏳️‍⚧️
@Foone
I opened it up again to fix an issue with the DC power plug and this time I noticed there's a secret MAGIC jumper here.
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