Pentium GA - 586AL, User Manual

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GA-586AL
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14
t
JP3: CPU Cooling Fan Power Connector
Pin No. Function
1 +12V
2 GND
t
CN1-6 I/O Ports Connector
CN1 For COM 1/3 (Serial port1 )
CN2 For COM 2/4 (Serial port2 )
CN4 For Floppy port
CN6 For LPT port
CN3 For Primary IDE port
CN5 For Secondary IDE port
3.4. DRAM INSTALLATION
The mainboard can be installed with 1 / 2 / 4 / 8 / 16 / 32 MB 72 pins SIMM
module DRAM, and the DRAM speed must be 70 ns. The DRAM memory system
on mainboard consists of bank 0, 1 & bank 2. The DRAM of any bank can be
installed first. Each bank consist of 2 PCs, 72 pins SIMM module DRAM.
Because the 72 pins SIMM module is 32 bits width, using 2 PCs which can
match a 64 bits system. The total memory size is 2 - 160 MB, and various
configuration of DRAM types in the following TABLE are available:
Bank 0 Bank 1 Bank 2 Single: Single bank SIMM Module
Single None None Ex. 1MB, 4MB, 16MB
Single Single
Single Single Single Double: Double banks SImm Module
Double None None Ex. 2MB, 8MB, 32MB
Double Single None
Double Single Single
Double Single Double
The DRAM installation position refer to Figure 3.1, and notice the Pin 1 of SIMM
module must match with the Pin 1 of SIMM socket when the DRAM SIMM
module is installed.
Insert the DRAM SIMM module into the SIMM socket at 45 degree angle. If there
is a wrong direction of Pin 1, the DRAM SIMM module couldn't be inserted
into socket completely. After completely insert SIMM module into socket, then
press the SIMM module in vertical direction until the left and right metal holders
can keep the SIMM module standing up con-firmly.