UNIDENTIFIED
486 VESA (REV. VL 421A/422)
| 
 Processor  | 
 CX486S/80486SX/80487SX/80486DX/80486DX2/P24T  | 
| 
 Processor Speed  | 
 20/25/33/40/50(internal)/50/66(internal)MHz  | 
| 
 Chip Set  | 
 Forex  | 
| 
 Video Chip Set  | 
 None  | 
| 
 Maximum Onboard Memory  | 
 36MB  | 
| 
 Maximum Video Memory  | 
 None  | 
| 
 Cache  | 
 64/128/256KB  | 
| 
 BIOS  | 
 AMI  | 
| 
 Dimensions  | 
 330mm x 218mm  | 
| 
 I/O Options  | 
 32-bit VESA local bus slots (2)  | 
| 
 NPU Options  | 
 None  | 
| 
 CONNECTIONS  | |||
| 
 Purpose  | 
 Location  | 
 Purpose  | 
 Location  | 
| 
 External battery  | 
 JP2  | 
 Turbo switch  | 
 JP15  | 
| 
 Reset switch  | 
 JP3  | 
 Turbo LED  | 
 JP16  | 
| 
 Power LED & keylock  | 
 JP9  | 
 32-bit VESA local bus slots  | 
 SL1 & SL2  | 
| 
 Speaker  | 
 JP10  | ||
| 
 USER CONFIGURABLE SETTINGS  | |||
| 
 Function  | 
 Label  | 
 Position  | |
| 
 Battery type select internal  | 
 JP2  | 
 Pins 1 & 2 closed  | |
| 
 Battery type select external  | 
 JP2  | 
 Closed  | |
| 
 »  | 
 Factory configured - do not alter  | 
 JP5  | 
 Unidentified  | 
| 
 »  | 
 Factory configured - do not alter (CMOS)  | 
 JP6  | 
 Unidentified  | 
| 
 DRAM CONFIGURATION  | |||
| 
 Size  | 
 Bank 0  | 
 Bank 1  | 
 Bank 2  | 
| 
 1MB  | 
 None  | 
 (4) 256K x 9  | 
 None  | 
| 
 2MB  | 
 None  | 
 (4) 256K x 9  | 
 (4) 256K x 9  | 
| 
 4MB  | 
 (8) 411000  | 
 None  | 
 None  | 
| 
 4MB  | 
 None  | 
 (4) 1M x 9  | 
 None  | 
| 
 5MB  | 
 (8) 411000  | 
 (4) 256K x 9  | 
 None  | 
| 
 5MB  | 
 None  | 
 (4) 1M x 9  | 
 (4) 256K x 9  | 
| 
 8MB  | 
 (8) 411000  | 
 (4) 1M x 9  | 
 None  | 
| 
 8MB  | 
 None  | 
 (4) 1M x 9  | 
 (4) 1M x 9  | 
| 
 12MB  | 
 (8) 411000  | 
 (4) 1M x 9  | 
 (4) 1M x 9  | 
| 
 16MB  | 
 None  | 
 (4) 4M x 9  | 
 None  | 
| 
 20MB  | 
 (8) 411000  | 
 (4) 4M x 9  | 
 None  | 
| 
 32MB  | 
 None  | 
 (4) 4M x 9  | 
 (4) 4M x 9  | 
| 
 36MB  | 
 (8) 411000  | 
 (4) 4M x 9  | 
 (4) 4M x 9  | 
| 
 Note: The location of banks 1 & 2 are unidentified.  | |||
| 
 DRAM JUMPER SELECTION  | |
| 
 Setting  | 
 JP105  | 
| 
 DIPPs used as bank 0  | 
 Pins 1 & 2 closed  | 
| 
 SIMMs used as bank 0  | 
 Pins 2 & 3 closed  | 
| 
 CACHE CONFIGURATION  | |||
| 
 Size  | 
 Bank 0  | 
 Bank 1  | 
 TAG  | 
| 
 64KB  | 
 (4) 8K x 8  | 
 (4) 8K x 8  | 
 (1) 8K x 8  | 
| 
 128KB  | 
 (4) 32K x 8  | 
 None  | 
 (1) 8K x 8  | 
| 
 256KB  | 
 (4) 32K x 8  | 
 (4) 32K x 8  | 
 (1) 32K x 8  | 
| 
 CACHE JUMPER CONFIGURATION  | ||||
| 
 Size  | 
 JP8A  | 
 JP8B  | 
 JP8D  | 
 JP8E  | 
| 
 64KB  | 
 Pins 2 & 3 closed  | 
 Pins 2 & 3 closed  | 
 Pins 2 & 3 closed  | 
 Pins 2 & 3 closed  | 
| 
 128KB  | 
 Pins 1 & 2 closed  | 
 Pins 1 & 2 closed  | 
 Pins 1 & 2 closed  | 
 Pins 1 & 2 closed  | 
| 
 256KB  | 
 Pins 2 & 3 closed  | 
 Pins 1 & 2 closed  | 
 Pins 2 & 3 closed  | 
 Pins 1 & 2 closed  | 
| 
 CPU SPEED SELECTION  | |||
| 
 Speed  | 
 JP7A  | 
 JP7B  | 
 JP7C  | 
| 
 20MHz  | 
 Pins 2 & 3 closed  | 
 Pins 1 & 2 closed  | 
 Pins 1 & 2 closed  | 
| 
 25MHz  | 
 Pins 1 & 2 closed  | 
 Pins 2 & 3 closed  | 
 Pins 1 & 2 closed  | 
| 
 33MHz  | 
 Pins 1 & 2 closed  | 
 Pins 1 & 2 closed  | 
 Pins 2 & 3 closed  | 
| 
 40MHz  | 
 Pins 2 & 3 closed  | 
 Pins 2 & 3 closed  | 
 Pins 1 & 2 closed  | 
| 
 50iMHz  | 
 Pins 1 & 2 closed  | 
 Pins 2 & 3 closed  | 
 Pins 1 & 2 closed  | 
| 
 50MHz  | 
 Pins 2 & 3 closed  | 
 Pins 1 & 2 closed  | 
 Pins 2 & 3 closed  | 
| 
 66iMHz  | 
 Pins 1 & 2 closed  | 
 Pins 1 & 2 closed  | 
 Pins 2 & 3 closed  | 
| 
 CPU TYPE SELECTION  | |||
| 
 Type  | 
 JP12  | 
 JP13  | 
 JP29  | 
| 
 CX486S  | 
 N/A  | 
 N/A  | 
 N/A  | 
| 
 80486 (PQFP)  | 
 Pins 2 & 3 closed  | 
 Pins 2 & 3 closed  | 
 Pins 2 & 3 closed  | 
| 
 80486SX  | 
 Pins 2 & 3 closed  | 
 Pins 2 & 3 closed  | 
 Pins 2 & 3 closed  | 
| 
 80487SX  | 
 Pins 1 & 2 closed  | 
 Pins 1 & 2 closed  | 
 Pins 2 & 3 closed  | 
| 
 80486DX  | 
 Pins 1 & 2 closed  | 
 Pins 1 & 2 closed  | 
 Pins 1 & 2 closed  | 
| 
 80486DX2  | 
 Pins 1 & 2 closed  | 
 Pins 1 & 2 closed  | 
 Pins 1 & 2 closed  | 
| 
 P24T  | 
 N/A  | 
 N/A  | 
 N/A  | 
| 
 CPU TYPE SELECTION (CON’T)  | ||||
| 
 Type  | 
 JP30  | 
 JP104  | 
 JP109  | 
 JP110  | 
| 
 CX486S  | 
 N/A  | 
 N/A  | 
 N/A  | 
 Pins 1 & 2 closed  | 
| 
 80486 (PQFP)  | 
 Pins 2 & 3 closed  | 
 N/A  | 
 N/A  | 
 N/A  | 
| 
 80486SX  | 
 Pins 2 & 3 closed  | 
 N/A  | 
 N/A  | 
 N/A  | 
| 
 80487SX  | 
 Pins 2 & 3 closed  | 
 N/A  | 
 N/A  | 
 N/A  | 
| 
 80486DX  | 
 Pins 1 & 2 closed  | 
 Pins 1 & 2 closed  | 
 Pins 1 & 2 closed  | 
 Pins 2 & 3 closed  | 
| 
 80486DX2  | 
 Pins 1 & 2 closed  | 
 Pins 1 & 2 closed  | 
 Pins 1 & 2 closed  | 
 Pins 2 & 3 closed  | 
| 
 P24T  | 
 N/A  | 
 Pins 2 & 3 closed  | 
 Pins 2 & 3 closed  | 
 N/A  | 
| 
 VL BUS WAIT STATE SELECTION  | ||
| 
 Setting  | 
 JP102  | 
 JP103  | 
| 
 0  | 
 Pins 1 & 2 closed  | 
 Pins 1 & 2 closed  | 
| 
 1  | 
 Pins 2 & 3 closed  | 
 Pins 2 & 3 closed  |