68kMLA Classic Interface
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| Click here to select a new forum. | | SPD Chip Programming | Posted by: trag on 2011-05-25 15:55:18
Any Mac hacks out there to let one program the SPD chip on a DIMM?
I know such things exist in the Windows world.
| Posted by: khmann on 2011-06-13 06:14:16
DIMM First Aid does something... I think it copies the profile from working sticks to non-working ones. I too would like a better solution then keeping a collection of PC desktop and laptops just to run SPDTool...
| Posted by: trag on 2011-06-13 11:25:41
Thank you. I'll look into that.
So, will a machine boot with one good DIMM and one unrecognized DIMM? For example, an MDD?
I think, ultimately, I'll probably have to just pull the SPD chip and program it with a chip programmer. Sigh.
| Posted by: khmann on 2011-06-17 06:25:59
Hmm... Not sure about that. I have in the past (many times) "hot plugged" a stick with bad SPD, while the machine is idle at open firmware or boot menu, but that is a TERRIBLE idea and you should not do it... Working on under warranty hardware and with essentially unlimited replacement parts sometimes makes one take stupid risks... Though fwiw, I have never had a problem.
also I never tried DFA with a DDR Mac... MDD do seem very particular about SPD though, it took me three tries to get a profile which would not intermittently freeze my machine (and I really don't know what was different... It wasn't something obvious like CAS latency or speed...)
Rather than desolder EEPROM, it would probably be easier just to solder 3 or 4 small jumper wires or hack up an old slot to make an adaptor.
| Posted by: techknight on 2011-06-17 18:55:00
alot of PC DDR1 and SDRAM laptops were VERY picky about the SPD chips, such as compaqs, and dells. I had a compaq that took DDR PC2100/266 and would NOT take anything else BUT that.
(sorry, not mac related)
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