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  |