PBs 1400 are notoriously RAM flaky. The 1400's memory controller is especially sensitive to timing variations in the RAM modules, and adding additional RAM usually makes things worse. The longer circuits (with additional modules) add capacitance which affects how the RAM and memory controller interact. If any part of the total RAM package is even close to being out of spec the mess can be useless.
This also explains why RAM may work in one arrangement and not in another where the modules are not identical. The piggybacked module is further from the memory controller and is thus loaded with longer circuits. I've found the Sonnet G3 upgrades to be especially sensitive to RAM issues, where modules which work fine with a standard processor fail with the G3 installed. Some of this is explained in the PB1400 addendum devnote: <http://developer.apple.com/documentation/Hardware/Developer_Notes/Macintos h_CPUs-PPC_Portable/PowerBook_1400_Addendum.pdf> dan k ................................. http://macdan.n3.net/ carracho://dankephoto.dhs.org:9700 hotline://dankephoto.dhs.org:9500 ................................. -- PowerBooks is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Enter To Win A | -- Canon PowerShot Digital Cameras start at $299 | Free iBook! | Support Low End Mac <http://lowendmac.com/lists/support.html> PowerBooks list info: <http://lowendmac.com/lists/powerbooks.shtml> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[email protected]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive: <http://www.mail-archive.com/powerbooks%40mail.maclaunch.com/> iPod Accessories for Less at 1-800-iPOD.COM Fast Delivery, Low Price, Good Deal www.1800ipod.com
