8 Jun
2013
8 Jun
'13
6:04 a.m.
On Jun 8, 2013, at 7:19, Tothwolf <tothwolf at concentric.net> wrote:
Your board with 4 30-pin SIMM sockets likely tops out
at 16MB. AFAIK, no one ever made 8MB 30-pin SIMMs, although at one time there were some
16MB SIMMs available at great expense (~$400.00/ea or ~$25/megabyte).
They're not as expensive now; I just recently put four of them into
my Quadra 700 (which definitely supports them) for about $40.
99% of the boards out there did not support 30-pin
SIMMs larger than 4MB though.
That's the rub. Inasmuch as the 30-pin sense lines were ever "standard",
I don't think there was ever a standard sense configuration for 16MB,
which means that the chipset would have to support the rows/cols
configuration (many didn't) and the BIOS would need to manually
probe the bounds of the memory array. Many Macs supported 16MB 30-
pin SIMMs, but my recollection is that more than a few didn't.
I do have a few EISA boards that could (8 sockets,
128MB max), but I never was able to put my hands on any 16MB 60ns 30-pin SIMMs in matched
sets of 4.
I don't recall if they're 60ns or not, but they're pretty cheap on eBay now.
You can often find them (matched sets, that is) marketed specifically
for Quadra 700s. :-)
- Dave