AQUARIUS SYSTEMS, INC.
MB-4DUPC
| 
 Processor  | 
 CX486S/80486SX/SL80486SX/CX486DX/AM486DX/UMCU5S/80486DX/ SL80486DX/CX486DX2/AM486DX2/80486DX2/SL80486DX2/AM486DX4/ 80486DX4/P24D/Pentium Overdrive/CXM1  | 
| 
 Processor Speed  | 
 20/25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)/MHz  | 
| 
 Chip Set  | 
 UMC  | 
| 
 Max. Onboard DRAM  | 
 128MB  | 
| 
 Cache  | 
 128/256/512KB  | 
| 
 BIOS  | 
 Award  | 
| 
 Dimensions  | 
 260mm x 220mm  | 
| 
 I/O Options  | 
 32-bit PCI slots (3), floppy drive interface, game port, green PC connector, IDE interfaces (2), parallel port, serial ports (2)  | 
| 
 NPU Options  | 
 None  | 
| 
 CONNECTIONS  | |||
| 
 Purpose  | 
 Location  | 
 Purpose  | 
 Location  | 
| 
 External battery  | 
 CN1  | 
 Power LED & keylock  | 
 CN9  | 
| 
 Serial port 2  | 
 CN2  | 
 Speaker  | 
 CN10  | 
| 
 Floppy drive interface  | 
 CN3  | 
 IDE interface LED  | 
 D9  | 
| 
 Parallel port  | 
 CN4  | 
 Green PC connector  | 
 JP9  | 
| 
 Game interface  | 
 CN5  | 
 Turbo switch  | 
 JP44  | 
| 
 IDE interface 2  | 
 CN6  | 
 Reset switch  | 
 JP45  | 
| 
 IDE interface 1  | 
 CN7  | 
 Turbo LED  | 
 LED1  | 
| 
 Serial port 1  | 
 CN8  | 
 32-bit PCI slots  | 
 PC1 - PC3  | 
| 
 USER CONFIGURABLE SETTINGS  | |||
| 
 Function  | 
 Jumper  | 
 Position  | |
| 
 Flash BIOS voltage select 12v  | 
 JP3  | 
 pins 1 & 2 closed  | |
| 
 Flash BIOS voltage select 5v  | 
 JP3  | 
 pins 2 & 3 closed  | |
| 
 CMOS memory normal operation  | 
 JP6  | 
 pins 1 & 2 closed  | |
| 
 CMOS memory clear  | 
 JP6  | 
 pins 3 & 4 closed  | |
| 
 »  | 
 Factory configured - do not alter  | 
 JP28  | 
 Open  | 
| 
 »  | 
 Factory configured - do not alter  | 
 JP29  | 
 Open  | 
| 
 »  | 
 Factory configured - do not alter  | 
 JP31  | 
 Open  | 
| 
 »  | 
 Factory configured - do not alter  | 
 JP37  | 
 Open  | 
| 
 DRAM CONFIGURATION  | ||||
| 
 Size  | 
 Bank 0  | 
 Bank 1  | 
 Bank 2  | 
 Bank 3  | 
| 
 2MB  | 
 (1) 512K x 36  | 
 NONE  | 
 NONE  | 
 NONE  | 
| 
 4MB  | 
 (1) 512K x 36  | 
 (1) 512K x 36  | 
 NONE  | 
 NONE  | 
| 
 4MB  | 
 (1) 1M x 36  | 
 NONE  | 
 NONE  | 
 NONE  | 
| 
 8MB  | 
 (1) 512K x 36  | 
 (1) 512K x 36  | 
 (1) 512K x 36  | 
 (1) 512K x 36  | 
| 
 8MB  | 
 (1) 1M x 36  | 
 (1) 1M x 36  | 
 NONE  | 
 NONE  | 
| 
 8MB  | 
 (1) 2M x 36  | 
 NONE  | 
 NONE  | 
 NONE  | 
| 
 16MB  | 
 (1) 1M x 36  | 
 (1) 1M x 36  | 
 (1) 1M x 36  | 
 (1) 1M x 36  | 
| 
 16MB  | 
 (1) 2M x 36  | 
 (1) 2M x 36  | 
 NONE  | 
 NONE  | 
| 
 16MB  | 
 (1) 4M x 36  | 
 NONE  | 
 NONE  | 
 NONE  | 
| 
 32MB  | 
 (1) 2M x 36  | 
 (1) 2M x 36  | 
 (1) 2M x 36  | 
 (1) 2M x 36  | 
| 
 32MB  | 
 (1) 4M x 36  | 
 (1) 4M x 36  | 
 NONE  | 
 NONE  | 
| 
 32MB  | 
 (1) 8M x 36  | 
 NONE  | 
 NONE  | 
 NONE  | 
| 
 64MB  | 
 (1) 4M x 36  | 
 (1) 4M x 36  | 
 (1) 4M x 36  | 
 (1) 4M x 36  | 
| 
 64MB  | 
 (1) 8M x 36  | 
 (1) 8M x 36  | 
 NONE  | 
 NONE  | 
| 
 128MB  | 
 (1) 8M x 36  | 
 (1) 8M x 36  | 
 (1) 8M x 36  | 
 (1) 8M x 36  | 
| 
 CACHE CONFIGURATION  | |||
| 
 Size  | 
 Bank 0  | 
 Bank 1  | 
 TAG  | 
| 
 128KB  | 
 (4) 32K x 8  | 
 NONE  | 
 (1) 8K x 8  | 
| 
 256KB (A)  | 
 (4) 64K x 8  | 
 NONE  | 
 (1) 32K x 8  | 
| 
 256KB (B)  | 
 (4) 32K x 8  | 
 (4) 32K x 8  | 
 (1) 32K x 8  | 
| 
 512KB  | 
 (4) 128K x 8  | 
 NONE  | 
 (1) 32K x 8  | 
| 
 CACHE JUMPER CONFIGURATION  | |||
| 
 Size  | 
 JP24  | 
 JP25  | 
 JP26  | 
| 
 128KB  | 
 Open  | 
 pins 1 & 2 closed  | 
 Open  | 
| 
 256KB (A)  | 
 pins 1 & 2 closed  | 
 pins 1 & 2 closed  | 
 pins 1 & 2 closed  | 
| 
 256KB (B)  | 
 pins 1 & 2 closed  | 
 pins 2 & 3 closed  | 
 Open  | 
| 
 512KB  | 
 pins 1 & 2, 3 & 4 closed  | 
 pins 1 & 2 closed  | 
 pins 1 & 2, 3 & 4 closed  | 
| 
 CPU TYPE CONFIGURATION  | |||||
| 
 Type  | 
 JP10  | 
 JP27  | 
 JP30  | 
 JP32  | 
 JP34  | 
| 
 CX486S  | 
 Open  | 
 Open  | 
 Open  | 
 1 & 2, 3 & 4  | 
 1 & 2  | 
| 
 80486sx  | 
 Closed  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
| 
 SL80486SX  | 
 Open  | 
 Open  | 
 Open  | 
 2 & 3, 4 & 5  | 
 Open  | 
| 
 CX486DX  | 
 Open  | 
 Open  | 
 3 & 4  | 
 1 & 2, 3 & 4  | 
 1 & 2  | 
| 
 AM486DX  | 
 Closed  | 
 Open  | 
 3 & 4  | 
 Open  | 
 Open  | 
| 
 UMC U5S  | 
 Closed  | 
 Open  | 
 1 & 2, 3 & 4  | 
 Open  | 
 Open  | 
| 
 80486DX  | 
 Closed  | 
 Open  | 
 3 & 4  | 
 Open  | 
 Open  | 
| 
 SL80486DX  | 
 Open  | 
 Open  | 
 3 & 4  | 
 2 & 3, 4 & 5  | 
 Open  | 
| 
 CX486DX2  | 
 Open  | 
 Open  | 
 3 & 4  | 
 1 & 2, 3 & 4  | 
 1 & 2  | 
| 
 AM486DX2  | 
 Closed  | 
 Open  | 
 3 & 4  | 
 Open  | 
 Open  | 
| 
 80486DX2  | 
 Closed  | 
 Open  | 
 3 & 4  | 
 Open  | 
 Open  | 
| 
 SL80486DX2  | 
 Open  | 
 Open  | 
 3 & 4  | 
 2 & 3, 4 & 5  | 
 Open  | 
| 
 AM486DX4  | 
 Closed  | 
 Open  | 
 3 & 4  | 
 Open  | 
 Open  | 
| 
 80486DX4  | 
 Open  | 
 Open  | 
 3 & 4  | 
 2 & 3, 4 & 5  | 
 Open  | 
| 
 P24D  | 
 Open  | 
 Open  | 
 3 & 4  | 
 2 & 3, 4 & 5  | 
 Open  | 
| 
 P24T  | 
 Open  | 
 Open  | 
 2 & 3  | 
 2 & 3, 4 & 5  | 
 2 & 3  | 
| 
 CX M1  | 
 Open  | 
 Closed  | 
 3 & 4  | 
 2 & 3, 4 & 5  | 
 1 & 2  | 
| 
 Note: Pins designated should be in the closed position.  | |||||
| 
 CPU TYPE CONFIGURATION (CON’T)  | ||||
| 
 Type  | 
 JP35  | 
 JP36  | 
 JP39  | 
 JP39  | 
| 
 CX486S  | 
 2 & 3  | 
 2 & 3  | 
 1 & 2  | 
 1 & 2  | 
| 
 80486sx  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
| 
 SL80486SX  | 
 Open  | 
 1 & 2  | 
 1 & 2  | 
 1 & 2  | 
| 
 CX486DX  | 
 2 & 3  | 
 2 & 3  | 
 1 & 2  | 
 1 & 2  | 
| 
 AM486DX  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
| 
 UMC U5S  | 
 Open  | 
 Open  | 
 2 & 3  | 
 2 & 3  | 
| 
 80486DX  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
| 
 SL80486DX  | 
 Open  | 
 1 & 2  | 
 Open  | 
 Open  | 
| 
 CX486DX2  | 
 2 & 3  | 
 2 & 3  | 
 1 & 2  | 
 1 & 2  | 
| 
 AM486DX2  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
| 
 80486DX2  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
| 
 SL80486DX2  | 
 Open  | 
 1 & 2  | 
 Open  | 
 Open  | 
| 
 AM486DX4  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
| 
 80486DX4  | 
 Open  | 
 1 & 2  | 
 Open  | 
 Open  | 
| 
 P24D  | 
 Open  | 
 1 & 2  | 
 1 & 2  | 
 1 & 2  | 
| 
 P24T  | 
 1 & 2  | 
 1 & 2  | 
 Open  | 
 Open  | 
| 
 CX M1  | 
 2 & 3  | 
 1 & 2  | 
 1 & 2  | 
 1 & 2  | 
| 
 Note: Pins designated should be in the closed position.  | ||||
| 
 CPU TYPE CONFIGURATION  | ||||
| 
 Type  | 
 JP39  | 
 JP40  | 
 JP41  | 
 JP42  | 
| 
 CX486S  | 
 1 & 2  | 
 3 & 4  | 
 1 & 2  | 
 2 & 3  | 
| 
 80486sx  | 
 Open  | 
 1 & 2  | 
 Open  | 
 2 & 3  | 
| 
 SL80486SX  | 
 1 & 2  | 
 3 & 4  | 
 Open  | 
 2 & 3  | 
| 
 CX486DX  | 
 1 & 2  | 
 3 & 4  | 
 2 & 3  | 
 1 & 2, 3 & 4  | 
| 
 AM486DX  | 
 Open  | 
 1 & 2  | 
 Open  | 
 1 & 2, 3 & 4  | 
| 
 UMC U5S  | 
 2 & 3  | 
 1 & 2  | 
 3 & 4  | 
 2 & 3  | 
| 
 80486DX  | 
 Open  | 
 1 & 2  | 
 Open  | 
 1 & 2, 3 & 4  | 
| 
 SL80486DX  | 
 1 & 2  | 
 3 & 4  | 
 Open  | 
 1 & 2, 3 & 4  | 
| 
 CX486DX2  | 
 1 & 2  | 
 3 & 4  | 
 2 & 3  | 
 1 & 2, 3 & 4  | 
| 
 AM486DX2  | 
 Open  | 
 1 & 2  | 
 Open  | 
 1 & 2, 3 & 4  | 
| 
 80486DX2  | 
 Open  | 
 1 & 2  | 
 Open  | 
 1 & 2, 3 & 4  | 
| 
 SL80486DX2  | 
 1 & 2  | 
 3 & 4  | 
 Open  | 
 1 & 2, 3 & 4  | 
| 
 AM486DX4  | 
 Open  | 
 1 & 2  | 
 Open  | 
 1 & 2, 3 & 4  | 
| 
 80486DX4  | 
 1 & 2  | 
 3 & 4  | 
 Open  | 
 1 & 2, 3 & 4  | 
| 
 P24D  | 
 1 & 2  | 
 3 & 4  | 
 Open  | 
 1 & 2, 3 & 4  | 
| 
 P24T  | 
 1 & 2  | 
 3 & 4, 5 & 6  | 
 2 & 3  | 
 1 & 2, 3 & 4  | 
| 
 CX M1  | 
 1 & 2  | 
 3 & 4  | 
 Open  | 
 1 & 2, 3 & 4  | 
| 
 Note: Pins designated should be in the closed position.  | ||||
| 
 CPU TYPE CONFIGURATION  | ||
| 
 Type  | 
 JP22  | 
 JP23  | 
| 
 Cyrix  | 
 pins 2 & 3 closed  | 
 pins 1 & 2 closed  | 
| 
 AMD  | 
 pins 1 & 2 closed  | 
 pins 2 & 3 closed  | 
| 
 UMC  | 
 pins 1 & 2 closed  | 
 pins 2 & 3 closed  | 
| 
 Intel  | 
 pins 1 & 2 closed  | 
 pins 1 & 2 closed  | 
| 
 CPU SPEED CONFIGURATION  | |||
| 
 Speed  | 
 JP5  | 
 JP7  | 
 JP8  | 
| 
 20MHz  | 
 Open  | 
 Open  | 
 Open  | 
| 
 25MHz  | 
 Open  | 
 Open  | 
 Closed  | 
| 
 33MHz  | 
 Closed  | 
 Closed  | 
 Closed  | 
| 
 40MHz  | 
 Open  | 
 Closed  | 
 Closed  | 
| 
 50iMHz  | 
 Open  | 
 Open  | 
 Closed  | 
| 
 50MHz  | 
 Closed  | 
 Open  | 
 Open  | 
| 
 66iMHz  | 
 Closed  | 
 Closed  | 
 Closed  | 
| 
 75iMHz  | 
 Open  | 
 Open  | 
 Closed  | 
| 
 100iMHz  | 
 Closed  | 
 Closed  | 
 Closed  | 
| 
 CPU SPEED CONFIGURATION (80486DX4 ONLY)  | |
| 
 Speed  | 
 JP33  | 
| 
 2x  | 
 pins 2 & 3 closed  | 
| 
 2.5x  | 
 pins 1 & 2 closed  | 
| 
 3x  | 
 Open  | 
| 
 CPU CONFIGURATION  | |
| 
 Type  | 
 JP38  | 
| 
 P24D write through  | 
 pins 1 & 2 closed  | 
| 
 P24D write back  | 
 pins 2 & 3 closed  | 
| 
 AMD CPU 2x  | 
 pins 1 & 2 closed  | 
| 
 AMD CPU 3x  | 
 Open  | 
| 
 Other CPU types  | 
 Open  | 
| 
 CPU VOLTAGE CONFIGURATION  | |||||||
| 
 Voltage  | 
 JP18  | 
 JP19  | 
 JP20  | 
 JP49  | 
 JP50  | 
 JP51  | 
 jp53  | 
| 
 3.3v  | 
 1 & 2  | 
 1 & 2  | 
 1 & 2  | 
 Open  | 
 Open  | 
 Open  | 
 Closed  | 
| 
 3.45v  | 
 1 & 2  | 
 1 & 2  | 
 1 & 2  | 
 Closed  | 
 Open  | 
 Open  | 
 Open  | 
| 
 3.6v  | 
 1 & 2  | 
 1 & 2  | 
 1 & 2  | 
 Open  | 
 Closed  | 
 Open  | 
 Open  | 
| 
 4v  | 
 1 & 2  | 
 1 & 2  | 
 1 & 2  | 
 Open  | 
 Open  | 
 Closed  | 
 Open  | 
| 
 5v  | 
 2 & 3  | 
 2 & 3  | 
 2 & 3  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
| 
 Note: Pins designated should be in the closed position.  | |||||||
| 
 DMA CONFIGURATION  | ||
| 
 DMA  | 
 JP47  | 
 JP48  | 
| 
 DMA 1  | 
 pins 1 & 2 closed  | 
 pins 1 & 2 closed  | 
| 
 DMA 3  | 
 pins 2 & 3 closed  | 
 pins 2 & 3 closed  |