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Acer 2100 Motherboard

Jumper and Connector Layout

2100 board diagram

Jumper Settings

Jumper	Setting	Function
JP12 - Vcore Voltage	1-2 2-3 *	2.8v 2.2v
JP8, JP9 - SDRAM, PCI	1-2, 1-2 2-3, 1-2 * 1-2, 2-3 2-3, 2-3	60MHz CPU, SDRAM - 30MHz PCI 66MHz CPU, SDRAM - 33MHz PCI 75MHz CPU, SDRAM - 30MHz PCI 83MHz CPU, SDRAM - 33MHz PCI
JP10 - CPU Type	1-2 2-3 *	AMD K6-300 AMD K6-333 and AMD K6-366
JP11 - Voltage Type	1-2 2-3	K6-300 K6-333 and K6-366

(For CY2273 CLK Generator)
SW2	SW1	CPU, SDRAM		PCI
On	On	60MHz		30MHz
On	Off	66MHz		33MHz
Off	On	75MHz		30MHz
On	Off	83MHz		33MHz
(For ICS9148 CLK Generator)
SW3	SW2	SW1	CPU, SDRAM	PCI
Off	Off	On	60MHz	30MHz
*Off	Off	Off	66MHz	33MHz
On	On	Off	75MHz	30MHz
On	Off	On	83MHz	33MHz
(Core/Bus CLK Rate)
SW6	SW5	SW4	P55C	PCI
* Off	Off	Of	3.5	30MHz
Off	Off	On	2	33MHz
Off	On	On	2.5	30MHz
Off	On	Off	3	33MHz
*On	Off	On
On	On	Off
On	Off	Off

Connector Functions

Connector	Function
CD1	CD-In
PH2	Speaker Out
JP13	Fan Connector or Power Supply
CN10	Power Button
CN20	Active LED
CN11	Power LED - Pin1 (Green), Pin2 (Orange), Pin3 (Black)

Memory Upgrade

The system memory is upgradable to a maximum of 256MB via two 168-pin DIMM sockets onboard.These DIMM sockets accept 128MB, 3.3V Synchronous DRAM modules in capacities of 32-, 64-, and 128-MB.

BIOS

How do I enter the BIOS Setup Utility?

You can access the BIOS Setup Utility by pressing CTRL+ALT+ESC as the system is booting. At the bottom of the second start up screen you should see "To enter setup, press CTRL_ALT_ESC".

Note: If the system displays the Acer Splash Screen, once you hear the beep, you should begin pressing CTRL+ALT+ESC.You may need to press CTRL+ALT+ESC continuously until you access the BIOS setup screen.