David Cook's latest activity
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David Cook replied to the thread Portable RAM Card 1MB -> 3MB by adding 658128ALFP chips. Is the B revision acceptable?.Thank you. That's good to know. I've ordered some of the static RAM chips and I'll update this thread after trying them. -
David Cook posted the thread Portable RAM Card 1MB -> 3MB by adding 658128ALFP chips. Is the B revision acceptable? in Macintosh Portable.As we all know, the Macintosh Portable is most limited by the lack of RAM upgrades available today. If you only have a 1 MB card (or...
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David Cook posted the thread Portable VGA Adapter -- Shout out to Joe's Computer Museum in Macintosh Portable.I recently purchased a VGA Adapter for the Macintosh Portable from Joe's Computer Museum. This device attaches to the back of the...
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David Cook replied to the thread BlueSCSI on Macintosh Portable.The Macintosh OS was novel in that it allowed files to consist of two "channels". The first channel is called the "data fork" and is...
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David Cook replied to the thread Portable Misc - Hinge clip fix, Earlier features, Super Static memory.When I asked if you had a primary source, I didn't expect you'd whip out Jean-Louis Gassée. :ROFLMAO:
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David Cook replied to the thread Portable Misc - Hinge clip fix, Earlier features, Super Static memory.I use this: https://amzn.to/4vcD03m It seems genuinely strong. I know the true test is whether the part breaks at the bond site or on...
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David Cook replied to the thread Macintosh LC III Bodge-Laden PCB.Nice job. C22 is reversed. That is, although you installed it in the way Apple marked it, Apple made a mistake. You need to flip it the...
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David Cook posted the thread Portable Misc - Hinge clip fix, Earlier features, Super Static memory in Macintosh Portable.Broken Corners I've seen enough broken cases that I lean toward being pragmatic rather than attempting a pristine repair. A common...
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David Cook replied to the thread Macintosh LC III Bodge-Laden PCB.Correct. Those are factory.
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David Cook replied to the thread I broke and fixed Macintosh Portable (backlight). Attached backlight circuit schematic that I reverse engineered.Looking at the Portable driver code, I believe O1 of U13G is also connected to display J19. It appears this is the backlight enable pin.
