|
|
SBC8251
AXIOM TECHNOLOGY, INC.
SBC8251
|
Processor
|
Cyrix/Pentium
|
|
Processor Speed
|
75/90/100/120/133/150/166/180/200MHz
|
|
Chip Set
|
Intel
|
|
Video Chip Set
|
Chips and Technology
|
|
Maximum Onboard Memory
|
64MB
|
|
Maximum Video Memory
|
2MB
|
|
Cache
|
256/512KB
|
|
BIOS
|
Unidentified
|
|
Dimensions
|
185mm x 122mm
|
|
I/O Options
|
Floppy drive interface, IDE interface, parallel port, PS/2 mouse port, PS/2 mouse interface, serial ports (2), VGA port, PC/104 connectors (2)
|
|
NPU Options
|
None
|
|
CONNECTIONS
|
|
Purpose
|
Location
|
Purpose
|
Location
|
|
PS/2 mouse port
|
CN1
|
Internal buzzer
|
JP12/pins 1- 3
|
|
VGA port
|
CN2
|
Power LED & keylock
|
JP12/pins 2 - 10
|
|
Serial port 1
|
CN3
|
External speaker
|
JP12/pins 4 - 7
|
|
Parallel port
|
CN4
|
Green PC connector
|
JP12/pins 5 & 9
|
|
Floppy drive interface
|
CN5
|
Reset switch
|
JP12/pins 11 & 12
|
|
IDE interface
|
CN6
|
IDE interface LED
|
JP12/pins 17 & 18
|
|
Serial port 2
|
CN7
|
Watchdog timer
|
JP3/pins 19 & 20
|
|
Power connector
|
J1
|
PC/104 connector
|
P1
|
|
Power connector
|
J3
|
PC/104 connector
|
P2
|
|
Keyboard, PS/2 mouse
|
J4
|
|
|
|
USER CONFIGURABLE SETTINGS
|
|
Function
|
Label
|
Position
|
|
»
|
Factory configured - do not alter
|
J2
|
Unidentified
|
|
»
|
SHFCLK normal operation
|
JP5
|
Pins 2 & 3 closed
|
|
|
SHFCLK inverted
|
JP5
|
Pins 1 & 2 closed
|
|
|
Flash BIOS write protect disabled
|
JP7
|
Pins 1 & 2 closed
|
|
|
Flash BIOS write protect enabled
|
JP7
|
Pins 2 & 3 closed
|
|
»
|
CMOS memory normal operation
|
JP8
|
Pins 2 & 3 closed
|
|
|
CMOS memory clear
|
JP8
|
Pins 1 & 2 closed
|
|
|
Cache type select write back
|
JP10
|
Pins 2 & 3 closed
|
|
|
Cache type select write through
|
JP10
|
Pins 1 & 2 closed
|
|
|
System clock = PCI clock/4
|
JP13
|
Open
|
|
|
System clock = PCI clock/3
|
JP13
|
Closed
|
|
SIMM CONFIGURATION
|
|
Size
|
Bank 0
|
|
8MB
|
(2) 1M x 36
|
|
16MB
|
(2) 2M x 36
|
|
32MB
|
(2) 4M x 36
|
|
64MB
|
(2) 8M x 36
|
|
SIMM REFRESH RATE CONFIGURATION
|
|
Setting
|
JP16/pins 1 & 2
|
|
60MHz
|
Closed
|
|
66MHz
|
Open
|
|
CACHE CONFIGURATION
|
|
Note: The location of the cache is unidentified.
|
|
CACHE JUMPER CONFIGURATION
|
|
Size
|
JP16
|
|
256KB
|
Pins 3 & 4 closed
|
|
512KB
|
Pins 5 & 6 closed
|
|
VIDEO MEMORY CONFIGURATION
|
|
Note: The location of the video memory is unidentified.
|
|
CPU BUS SPEED SELECTION
|
|
Speed
|
JP18
|
|
50MHz
|
Pins 1 & 2, 3 & 4 closed
|
|
55MHz
|
Open
|
|
60MHz
|
Pins 3 & 4 closed
|
|
66MHz
|
Pins 1 & 2 closed
|
|
CPU BUS/CORE SELECTION
|
|
Bus/Core
|
JP16
|
|
2/5
|
Pins 7 & 8, 9 & 10 closed
|
|
1/3
|
Pins 9 & 10 closed
|
|
1/2
|
Pins 7 & 8closed
|
|
2/3
|
Open
|
|
CPU TYPE SELECTION
|
|
Type
|
JP9
|
|
Cyrix
|
Pins 1 & 2 closed
|
|
Intel
|
Pins 2 & 3 closed
|
|
CPU VOLTAGE SELECTION (SINGLE)
|
|
Voltage
|
JP1
|
|
3.3v
|
Pins 1 & 2 closed
|
|
3.6v
|
Pins 2 & 3 closed
|
|
CPU VOLTAGE SELECTION (DUAL)
|
|
Voltage
|
JP2
|
|
2.7v
|
Pins 4 & 6 closed
|
|
2.9v
|
Pins 2 & 4 closed
|
|
3.3v
|
Pins 1 & 3 closed
|
|
3.45v
|
Pins 3 & 5 closed
|
|
SERIAL PORT 2 SELECTION
|
|
Setting
|
JP11
|
JP17
|
|
RS232
|
5 & 6
|
3 & 5, 4 & 6, 9 & 11, 10 & 12
|
|
RS422
|
3 & 4
|
1 & 3, 2 & 4, 7 & 9, 8 & 10
|
|
RS485
|
1 & 2
|
1 & 3, 2 & 4, 7 & 9, 8 & 10
|
|
Note: Pins designated should be in the closed position.
|
|
LCD PANEL INTERFACE SELECTION
|
|
Setting
|
JP6
|
JP15
|
|
3.3v panel
|
Closed
|
Pins 1 & 2 closed
|
|
5v panel
|
Open
|
Pins 2 & 3 closed
|
|
LCD PANEL TYPE SELECTION
|
|
Note: Pins 9 & 10, 11 & 12, 13 & 14, 15 & 16 on JP3 are used to select up to 16 typed of LED BIOS.
|
|
DISK ON CHIP ADDRESS SELECTION
|
|
Setting
|
JP3
|
|
C0000 – C7FFF
|
Pins 1 & 2 closed
|
|
C8000 – CFFFF
|
Pins 3 & 4 closed
|
|
D0000 – D7FFF
|
Pins 5 & 6 closed
|
|
D8000 – DFFFF
|
Pins 7 & 8 closed
|
|