Latest activity
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Ttrag replied to the thread Bank Distinction on PMX500 and 7200 DIMM?.Looking through the Hammerhead and Platinum documents carefully, they strongly suggest that banks are controlled on a /RAS basis...
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SStevieB replied to the thread Hacking the Kodak Reels 8mm Film Digitizer (New Thread).Hello Tinkerers! Like some on here, I'm a 'newbie' who has just bought a Kodak Reels unit to digitise the 8mm family cine films my Dad...
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Ttrag replied to the thread Bank Distinction on PMX500 and 7200 DIMM?.Just started reading, but the Platinum ERS document states right up front that it supports up to eight, 128 MB banks of RAM on four DIMMs.
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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.Here are the IDs (see U13H): Backlit portable: $A5 10100101 Upgraded original portable: $A3 10100011 PowerBook 100: $AD 10101101 -
David Cook replied to the thread I broke and fixed Macintosh Portable (backlight). Attached backlight circuit schematic that I reverse engineered.They're outputs, so they could just be floating. Thanks for letting me know. If I get a chance, I'll also take a look. It wouldn't...
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AAppleTree replied to the thread I broke and fixed Macintosh Portable (backlight). Attached backlight circuit schematic that I reverse engineered.I wasn't sure where 74AC374's O0 to O4 (5 unused bits you referred to) were connected to. Traces from those pins went under 74AC374 and...
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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.I had no idea that the "backlight id" and "backlight brightness register" were implemented in such a rudimentary manner. There are 5...
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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.Incredible write up! It explains so much. Based on your schematic, the digital potentiometer chip (U14G) is actually being used as a...
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AAppleTree replied to the thread I broke and fixed Macintosh Portable (backlight). Attached backlight circuit schematic that I reverse engineered.Thank you for the warm welcome. I enjoy watching your videos. In fact, your video on the Portable backlight model taught me how to...