3-3
Installing System Memory and Add-On Peripherals
System Memory
System memory devices, commonly known as SIMMs (Single Inline Memory
Modules), are necessary to operate the M4Pi system board. The M4Pi has
four SIMM sockets and can be upgraded to 128 Megabytes of RAM. This
section will explain the type of SIMMs supported, list the memory configura-
tions supported, and show how to physically install the new SIMMs.
SIMMs Supported
The M4Pi supports the following 72 pin, 60 or 70ns SIMMs:
4MB (1Mx36)
8MB (2Mx36)
16MB (4Mx36)
32MB (8Mx36)
Memory Configurations
The following table (Figure 3-1) lists the most common memory configura-
tions supported.
Memory
Bank 0
Bank 1
8MB
(2) 1MBx36
16MB
(2) 1MBx36
(2) 1MBx36
16MB
(2) 2MBx36
24MB
(2) 2MBx36
(2) 1MBx36
32MB
(2) 4MBx36
32MB
(2) 2MBx36
(2) 2MBx36
40MB
(2) 4MBx36
(2) 1MBx36
48MB
(2) 4MBx36
(2) 2MBx36
64MB
(2) 8MBx36
64MB
(2) 4MBx36
(2) 4MBx36
72MB
(2) 8MBx36
(2) 1MBx36
80MB
(2) 8MBx36
(2) 2MBx36
96MB
(2) 8MBx36
(2) 4MBx36
128MB
(2) 8MBx36
(2) 8MBx36
Table 3-1 Common Memory Configurations