Choosing Simms For Sample Ram; Using Headphones With The K2500 - Kurzweil K2500 Reference Manual

Memory Upgrades and Other Options

Choosing SIMMs for Sample RAM

the one you specified in the Bank dialog before you loaded the file. A quick way to see where
the objects you loaded ended up is to use the "Objects" Utility function in Master mode.
Select Master mode and press the Utility soft button. Press the Objects soft button, and a list of
RAM objects will appear. Use the Alpha Wheel to scroll through the list of objects. You'll see the
type, ID, name, and size (in bytes) of each object.
Choosing SIMMs for Sample RAM
Single In-Line Memory Modules, commonly referred to by the acronym "SIMM", are the small
memory cards that the K2500 uses for Sample RAM. You can add up to eight SIMMs to your
K2500, and since they range in available size up to 16 Megabytes, that means you can add up to
128 Megabytes of Sample RAM to your machine.
The K2500 will accept 30-pin non-composite SIMMs, in sizes of 1 Megabyte, 4 Megabytes, and
16 Megabytes, in either 8-bit or 9-bit configurations. The SIMMs must have an access time of 80
nanoseconds (ns) or faster. The maximum height and width of a SIMM for the K2500 is 30mm x
90mm (approximately 1.2 inches x 3.5 inches). Below is a list of some SIMMs that will work
with your K2500:
SIMMs are always installed in adjacent pairs, and must be installed by an authorized Kurzweil
facility.
CAUTION:
PAL or other additional circuitry to make multiple DRAM chips act like bigger chips. Non-composite
SIMMs (the kind you may use in your K2500) have no chips other than DRAM memory chips soldered
to the board. SIMMs with PALs, buffers, or other logic components will not work in your K2500, and
must not be used.

Using Headphones with the K2500

A good pair of headphones can be indispensable when you want to play but need to keep the
volume down. You'll get optimum performance from headphones with at least 50 ohms
impedance, but anything over 8 ohms is adequate. Headphone volume decreases as the
impedance decreases.
8-2
Hitachi HB56A48A; 4Mx8
Hitachi HB56A49A; 4Mx9
TI TM124EU9B, TM124EU9C; 1Mx9
TI TM497EAD9B, TM4100EAD9; 4Mx9
TI TM4100GAD8, TM497GAD8A; 4Mx8
TI TM16100GBD8;16Mx8
TI TM16100EBD9;16Mx9
NEC MC-421000A8B; 1Mx8
NEC MC-424100A8B; 4Mx8
NEC MC-421000A9B; 1Mx9
NEC MC-424100A9B; 4Mx9
Tosh THM81000AS, Tosh THM81000BS, Tosh THM81070AS; 1Mx8
Tosh THM91000AS, Tosh THM91000BS, Tosh THM91070AS; 1Mx9
You must not use composite SIMMs in your K2500. A composite SIMM is one that uses a