> > No Apple ever supported ECC, but then very few Apples ever supported parity > generation and checking (the IIsi, Q900/Q950/WGS 95 and all Apple Network > Servers did). > > [ "Does ] not support ECC memory", in this case, means Apple products do not > support the generation and checking of the ECC polynomial, and so not support > the correction of memory failures upon discovering such a failure in > combination with the availability of a valid ECC polynomial, thereby causing > the putatively "bad" memory cell(s) to be rewritten and thus causing that > "bad" memory to be made "good". > > Just as most a Apples which, on paper, required 30- or 72-pin non-parity > SIMMs would gladly accept parity SIMMs, it is certainly possible, indeed it > is highly likely that Apples will accept ECC DIMMs, if all other requirements > are met, such as 5-volt power operation and FPM or EDO mode accessing, in the > same 168-pin package. The extra ECC bits (usually 5) will simply be ignored, > much as the extra parity bits (1 or 4) were ignored in the 30- and 72-pin > cases. >
Hi, thanks for these details. By the way, do you know why it seems impossible to find 168 DIMMs 128 MB EDO or FPM that would be lower than 4k ? This is of paricular interest to me, because when I put such a DIMM in my Peforma 6500 it only sees 64 MB. Would a 256 MB EDO DIMM be recognized as 128 MB ? Thierry -- PCI-PowerMacs is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | -- Sonnet & PowerLogix Upgrades - start at $169 | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> PCI-PowerMacs list info: <http://lowendmac.com/lists/pci-powermacs.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/pci-powermacs%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
