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CHAPTER 3
MEMORY EXPANSION
The CYBERSTORM MKIII Accelerator features a 64-bit wide memory expansion option, realized
by 4 standard SIMM sockets where memory modules can be installed.It is necessary for the ope-
ration of the CYBERSTORM MKIII to install at least 8 MByte of memory (two modules each with a
size of 4 MB) ; some of todays complex software applications, however, may require a larger amo-
unt of memory to operate.
As the memory expansion on the CYBERSTORM MKIII is 64-bit wide, it is necessary to expand
the memory with pairs of equal PS/2 type memory modules, which are each 32-bit wide. The
CYBERSTORM MKIII provides two logical memory banks, bank 0 and bank 1 (please refer to pic-
ture 6 for the location of the memory banks). Bank 0 must always be populated with SIMMs first.
When installing pairs of equal SIMMs in each of the memory banks, always make sure that you
use absolutely identical types of SIMMs (same memory speed, same type, preferrably same ven-
dor) in order to avoid problems with the memory access which may result in a complete system
failure.
The size of the memory installed on the CYBERSTORM MKIII is automatically recognized, and the
memory will be automatically configured and added to the system memory, provided that the
memory is correctly installed following these instructions. The CYBERSTORM MKIII will accept
pairs of industry standard 32-bit SIMMs (also known as PS/2 type SIMMs) with memory sizes of 4
MByte, 8 MByte, 16 MByte and 32 MByte per SIMMs. It is allowed to use pairs of different sized
SIMMs in each of the banks; however, it is necessary that ALL SIMMs installed on the CYBER-
STORM MKIII have the same speed.
EXAMPLE:
You can install two 8 MByte SIMMs in memory bank 0, and two 16 MByte SIMMs in memory
bank 1, and will have a total installed memory of (2 x 8)+(2x 16) = 48 MByte. In any possible
combination, you will always get one continguous block of memory with the total size of the
SIMMs installed. It makes no difference in which memory bank the larger SIMMs are instal-
led.
ATTENTION!:
If the memory on the CYBERSTORM MKIII is not installed in pairs and following the instruc-
tions above, this may result in a wrong recognition of the installed memory and related system
malfunction.
The SIMMs that can be used may etiher be 32-bit types (without parity) or 36-bit types (with pari-
ty); if 36-bit types are installed, the parity bits of these SIMMs are ignored. The SIMMs installed on
the CYBERSTORM MKIII must be 70ns speed grade or faster; it is highly recommended to look
for 60ns or faster types when new modules are bought.
Summary of Contents for CYBERSTORM MKIII
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