A-Trend OPTi-895 Deep Green Model 1442G v. 1.2
© Carl C. Verderber 25/07/2002
SIM MODULES INSTALLATION
The OPTi-895 486 Green motherboard can be expanded from 2MB to 128MB by using 256K, 1M, 4M, 16M types of SIM Modules.
The following table provides various configurations of SIM Modules installed in Memory Bank 0-1.
JP34:1-2(SIM9,10 use single density SIM, please refer to figure 2-1)
Bank 0
30 Pin SIMMS
SIMMS 1-4
Bank 0
72 Pin SIMM
SIMM 9
Bank 1
72 Pin SIMM
SIMM 10
Total Memory
256KBX4
None
1MB
2MB
None
1MB
1MB
2MB
1MBX4
None
None
4MB
None
4MB
None
4MB
256KBX4
None
4MB
5MB
None
1MB
4MB
5MB
1MBX4
None
4MB
8MB
None
4MB
4MB
8MB
4MBX4
None
None
16MB
None
16MB
None
16MB
None
1MB
16MB
17MB
256KBX4
None
16MB
17MB
1MBX4
None
16MB
20MB
None
4MB
16MB
20MB
4MBX4
None
16MB
32MB
None
16MB
16MB
32MB
16MBX4
None
None
64MB
None
64MB
None
64MB
16MBX4
None
64MB
128MB
None
64MB
64MB
128MB
JP34:2-3(SIM 9,10 Use double density SIM, Please refure to figure 2-2)
Bank 0
SIM 1-4
Bank 0,1
72 Pin SIMM
SIM 8
Bank 2,3
72 Pin SIMM
SIM 10
Total Memory
None
2MB
2MB
4MB
None
8MB
None
8MB
None
8MB
8MB
16MB
SRAM INSTALLATION
The motherboard can support cashe memory from 64K to 256K bytes. Any of 8KX8 or 32KX8 can be used on the motherboard.
Cashe Configuration Size
Cache
Size
TAG
RAM
Data
RAM
JP1
JP2
JP3
JP4
JP30
64K
8Kx8
(U11)
Bank 0,1 8Kx8
(U1-U4) (U7-U10)
3
2
1
3
2
1
2
1
2
1
3
2
1
128K
8Kx8
(U11)
Bank 0
32Kx8
(U1-U4)
3
2
1
3
2
1
2
1
2
1
3
2
1
256K
32Kx8
(U11)
Bank 0,1
32Kx8
(U1-U4)
(U7-U10)
3
2
1
3
2
1
2
1
2
1
3
2
1
NOTE: Bank 0: U1,U2,U3,U4
Bank 1: U7,U8,U9,U10
CPU INSTALLATION
Please notice CPU to be installed on the ZIF socket on correct PIN 1 location (SEE PINOUTS ON DIAGRAM OF MOTHERBOARD!!!)
CPU type Selection :
CPU Type
JP21
JP22
JP23
INTEL 486DX/DX2/DX4/P24D
AMD 486SX/SX2
CYRIX M7
3
2
1
3
2
1
3
2
1
INTEL 486SX/SX2
CYRIX M6
3
2
1
3
2
1
3
2
1
P24D
3
2
1
3
2
1
3
2
1
CPU SPEED SELECTION
CLOCK RATE
JP9
JP10
JP11
JP31
486DX-25/
DX2-50
2
1
2
1
2
1
3
2
1
486DX-33/
DX2-66
2
1
2
1
2
1
3
2
1
486DX40/
486DX2-80
2
1
2
1
2
1
3
2
1
486DX-50
2
1
2
1
2
1
3
2
1
486DX4-75*
2
1
2
1
2
1
3
2
1
486DX4-100*
2
1
2
1
2
1
3
2
1
NOTE : * JP18:1-2,4-5 Use 5V CPU Normal CPU 486DX2,DX,SX
2-3,5-6 Use 3.3V CPU ( Example: 486DX4 )
* 486DX4 IS P24C
OTHER JUMPER SETTINGS
Connector
Description
JP16
P24C Clock Speed Rate
Open: for normal CPU/P24C 3X speed
JP19
Cyrix M6/M7 CPU Jumper
1-2: normal/ other CPU, M6/M7
JP20
Cyrix Clock Speed Rate
Open: For normal/other CPU
- : M7/M6 1xClock Speed
2-3 : M7/M6 2xClock Speed
JP24
P24D Jumper
Open : Normal/ Other CPU
Close : For P24D CPU only
JP12, JP13
CPU Green Down Speed
Open, Open ( Green Speed 8MHz/16MHz )
JP14,JP25,JP26,JP33
SMI CPU Jumper
Open, Open : For normal CPU
1-2, Open: For Cyrix Write Back CPU
2-3, Open: For INTEL P24T Write Back
Open, Close: INTEL P24D Write Back
JP15,JP17
Write Back CPU Function Jumper
Open, Open: For Normal CPU
1-2, Open: For Cyrix Write Back CPU
2-3, Open: For INTEL P24T Write Back
Open, Close: INTEL P24D Write Back
CONNECTOR
DESCRIPTION
J3
Reset Switch
J5
Turbo LED
J4
Turbo Switch
Closed: Turbo Mode
Opened: Non-Turbo Mode
J2
Speaker
J1
Key Lock Connector
Pin 1: Power LED
Pin 2: Unused
Pin 3: Ground
Pin 4: Key Lock
Pin 5: Ground
JP5
VESA ID3 Wait State
Default: Closed
JP6
VESA ID2 Bus Speed
Default: Closed
J6
External Battery
Pin 1: Battery( + )
Pin 2: Unused
Pin 3: Ground
Pin 4: Ground
JP32
Opened : Discharge Battery
Closed: Charge Battery
JP29
Battery Type
- Charge:
1-2 Normal
2-3 Clear CMOS Data
JP27
Monitor Type
Closed: Color Monitor
Opened: Monochrome Monitor
JP28
Green Power Signal
Input Connector
