David Cook's latest activity
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David Cook replied to the thread Macintosh II & IIx replacement battery holders.Here are more details: https://tinkerdifferent.com/threads/macintosh-ii-iix-battery-holder-daughterboard-analysis.4978/ -
David Cook posted the thread Macintosh II / IIx Battery Holder Daughterboard Analysis in Macintosh II.The Macintosh II and Macintosh IIx originally had soldered-on batteries for retaining parameter RAM memory and the clock. Later versions...
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David Cook replied to the thread Macintosh II & IIx replacement battery holders.Your comment was thought provoking. So, I just did an investigation and measured it. The problem with that capacitor is that it is wired...
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David Cook replied to the thread PowerBook 100 & 170 owners.I picked up what I thought was the low-power + EMI filter Portable (or PowerBook) mouse. Indeed, it has the extra long connector. The...
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David Cook replied to the thread Macintosh IIfx questions.That's a reasonable conclusion and would not be unusual. However, I've noticed that the IIfx can be very fiddly with memory slots in...
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Digging around in the ROM and source code, Apple originally planned to include removable disk cards on the Macintosh Portable. This...
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David Cook replied to the thread Test Jig for CC analog/digital boards.That will save so much time and annoyance for a problematic compact Mac. Thank you for sharing.
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A couple of curiosities I picked up -- APS SCSI Power Plug II. I assume these allow you to 'hot swap' or 'hot power' SCSI devices...
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David Cook replied to the thread Macintosh II SI capacitor question.Those are ceramic capacitors, which are non-polar. That's why there aren't any +/- markings. However, the capacitors there are supposed...
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David Cook replied to the thread Mac IIci "It is now safe to switch off your Macintosh".Wonderful! Congratulations.
