rand@merrimack.edu (02/25/91)
Someone recently made a donation of some SIMMs I'd like to identify.
They came in a box labelled "Multi-SIMMs Megabyte SIMM modules for the
Macintosh Plus, SE, and II" from SiCLONE.
In each box there are 4 SIMMs. I'm wondering if the person gave us the
1/4MB SIMMs he replaced or really gave us 1MB SIMMs. Here are the
markings on the SIMMs:
First set:
Back:
NEC MC-41256a8b-12
8828me
Front of the 8 chips:
NEC
d41256-12
8825eea33
Second set:
Back:
PG Design Electronics
Front of the 8 chips (markedly larger than the first set)
km41c1000j-12
815 korea
Do I have the real McCoy or the old McCoy?
thanks
Rand P. Hall UUCP: {uunet,wang,ulowell}!samsung!hubdub!rand
Merrimack College rand%merrimack.edu@samsung.com
N. Andover, MA I spend so much time doing nothing. Life's wasting away.dbert@churchy.ai.mit.edu (Douglas Siebert) (02/26/91)
In article <1991Feb25.101258.21262@merrimack.edu> rand@merrimack.edu writes: >Someone recently made a donation of some SIMMs I'd like to identify. >They came in a box labelled "Multi-SIMMs Megabyte SIMM modules for the >Macintosh Plus, SE, and II" from SiCLONE. > >In each box there are 4 SIMMs. I'm wondering if the person gave us the >1/4MB SIMMs he replaced or really gave us 1MB SIMMs. Here are the >markings on the SIMMs: > >First set: >Back: > >NEC MC-41256a8b-12 >8828me > >Front of the 8 chips: > >NEC >d41256-12 >8825eea33 > >Second set: >Back: > >PG Design Electronics > >Front of the 8 chips (markedly larger than the first set) > >km41c1000j-12 >815 korea > > >Do I have the real McCoy or the old McCoy? > >thanks Sorry, you have the old McCoy. The 41256 means 256Kbits are in each chip (x8 chips = 256K bytes of course) Perhaps someone else out there could answer a question I have now....is the -12 after that an indication of speed? If so, in what way> Does the 12 mean 120ns? Or does it mean it'll work on machines with speeds of under 12MHz? Or is it unrelated to this? And on a related note, how does processor speed relate with memory speed? I know that faster processors need faster memory, but is there a formula you can use where you can take one variable and determine the boundaries on the other? Thanks. -- ________________________________________________________________________ Doug Siebert dbert@albert.ai.mit.edu MBA Student (2nd year) The University of Iowa