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4386c ISA Motherboard Solution - 4386C Specification ============= Processor: 80386DX/80486SX/80486DX Memory Capacity: up to 32MB Mem. Configuration: 1/2/4/8/16/32 MB Memory using: 256K/1M/4M Module, memory up to 32MB on board, 30pin modules BIOS Type: AMI ROM BIOS Slots: six 16bit and two 8bit form factor: 2/3 baby AT size board design: four layer implementation misc connectors: reset button, turbo switch, external batt. SIMM Installation ================= Bank0 alone or Bank0 and Bank1 exactly the same (256K,1M,4M). Cache SRAM Install Selection ============================ J6 J7 J8 J9 CacheB0 CacheB1 tag size --------------------------------------------------------- 2-3 2-3 2-3 open 8KX8, 4pcs none 8KX8 32K 2-3 1-2 2-3 open 8KX8, 4pcs 8KX8, 4pcs 8KX8 64K 1-2 1-2 2-3 open 32KX8, 4pcs none 8KX8 128K 1-2 1-2 1-2 short 32KX8, 4pcs 32KX8, 4pcs 32KX8 256K CPU TYPE CHOICE =============== J10 J11 J12 using --------------------------------------- short 2-3 1-2 486DX, 486DX2, P24 short 1-2 1-2 486SX, P23T open open 2-3 486SX MISC JUMPERS ============ J17: Display adapter setup open = mono close = color J1: Keylock & Power Led Connector pin 1 = LED power pin 2 = not used pin 3 = ground pin 4 = keyboard inhibiter pin 5 = ground J2: Speaker connector pin 1 = data out pin 2 = not used pin 3 = ground pin 4 = +5V J3: Reset SW Connector pin 1 = ground pin 2 = reset in J4: Turbo LED Connector pin 1 = - cathode pin 2 = + anode J5: Turbo SW Connector pin 1 = ground pin 2 = select pin J18: External Battery Connector pin 1 = battery (+) pin 2,3 = short is internal battery 3.6V used pin 4 = ground ( J18: 1-2 normal operation (default) 3-4 clear CMOS memory (206 setup of data) ) |