PowerBook Duo: Tilt & Swivel Base . . .

[Trash80toHP_Mini]

. . . I never really considered this a hack, as it stands. It was just one of those little utilitarian mods I do, now and then, to make things a bit easier for myself. It's incredibly simple and very easy to excecute if somebody wants to take a shot at the "Hardware Hacking" experience.

At Bunsen's request, I'm posting this hack, as is, before I start mucking about installing all kinds of DuoDock parts and boards, a MiniDock Shell and printed circuit connector to connect the Duo to said boards and all the fol-de-rol usually associated with one of my more . . . shall we say . . . esoteric hacks?

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All that's required (besides any Duo ever made :lisa: ) is an extra tilt & swivel base from one of the 5XXX AIOs.

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Above is the closed front view and above that is the open front view.

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Located in the middle of the pic is the heart-n-soul of this simple hack. After I'd realized that the Duo's Rubber-Bumper Side Trim fit snugly inside the ribs of the 5XXX AIO's floorpan, i looked for a way to make the thing less FUGLEEEEEE!!!!!!!!!! Which involved just turning the bottom plate around 180 degrees on the tilter/swiveler combo. All I had to do was compress the mounting claws to release the floorplan, turn the sucker around and then clip it back on. No muss, no fuss!

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Right Rear Oblique view.

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Left Front (mostly side) Oblique View.

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Side view.

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Dead-on Front View.

If anyone wants to try this, it's inexpensive, easy, and it makes typing on a Duo sittin' upon a low coffee table a dream!

 

[MacJunky]

Neat how it fits in like that.

 

[Trash80toHP_Mini]

I've been a bit busy on eBay of late, collecting parts to finish off several of my ongoing Hacks. For this one I just PayPal'd the money for a second MiniDock & Floppy Microdock to finish off the @$$ end of this hack.

I just need to get another DuoDock to dress up the front and provide some internal bits to go for a DuoDock III™ Hack! }

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jabberwocky

[attachment=1]LisaProfile.jpg[/attachment]

[attachment=0]LisaReferenceShots2.jpg[/attachment]

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[attachment=6]SIMMspender.00.2p.jpg[/attachment]

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[attachment=3]30pinMESS.2p.jpg[/attachment]

They are two banks of 4M X 32 bits. Which means that they are built out of sixteen 4M X 4 chips. Each set of eight chips is wired to the same RAS line on the SIMM, with the other set of eight using a different RAS line -- actually probably two RAS lines per bank (set of eight) because there are four RAS lines in a 72 pin SIMM.

Controlling the RAS lines separately is how banks are done on 72 pin SIMMs, as far as I can tell. It looks like it's possible to do the CAS lines individually as well, but I think those just have the potential to control the SIMMs in a byte-wise manner, although I'm not certain about that last bit.

[attachment=4]MacII_Mem_Schematic.2p.jpg[/attachment]

[attachment=2]IIsi-30pinSIMMpinput.2p.jpg[/attachment]

XXX