KnowledgeBase | K2661 | Sampling

Sample RAM Specifications for the K2661 (SIMMs)

What are the specs for Sample RAM (SIMMs) for my K2661/S?


Choosing Sample RAM for the K2661

Single In-Line Memory Modules, commonly referred to by the acronym "SIMM", are the small memory cards that are used for Sample RAM in the K2661 instruments. SIMMs for the K2661 are user installable. This is documented in the K2661 manual.

IMPORTANT: Do not use composite SIMMs in any Kurzweil instrument. A composite SIMM is one that uses a PAL or other additional circuitry to make multiple DRAM chips act like bigger chips. Non-composite SIMMs (acceptable) have no chips other than DRAM memory chips soldered to the board. SIMMs with PALs, buffers, or other logic components will not work in a K2661; do not use them. Composite SIMMs may appear to work in some cases, but they will be unreliable.

K2661 SIMM Specification

K2661's support up to 128MB of sample RAM in one slot. It is user installable. The SIMM must meet the following specs:

  • 72-pin
  • The K2661 can use either 5 volt or 3.3 volt SIMMs*.
    (*An internal jumper must be set to match the correct voltage SIMM.)
  • Must be non-composite SIMMs
  • Allowable sizes are 4 MB, 8 MB, 16 MB, 32 MB, 64 MB, and 128 MB
  • Either 32-bit or 36-bit configurations supported
  • 80 ns or faster
  • Both EDO and FPM SIMMs supported

For a list of companies that make SIMMs which we know work correctly, please see our Developers List. (Other companies may also have proper SIMMs).

Need more info? Check out the following links: