CHEERFUL INTERNATIONAL CORPORATION S680 Processor 80386SX Processor Speed 16MHz Chip Set Intel Max. Onboard DRAM 2MB Cache None BIOS AMI Dimensions 330.2mm x 218.4mm I/O Options None NPU Options 80387SX [Image] CONNECTIONS Purpose Location Purpose Location Reset switch CN1 Speaker CN4 Turbo switch CN2 Power LED & keylock CN7 Turbo LED CN3 External battery CN8 Note:CN2 can be connected to a turbo switch, however the manufacturer recommends that the computer be turned off before changing the CPU speed. USER CONFIGURABLE SETTINGS Function Jumper Position » CPU speed select fast CN2 closed CPU speed select slow CN2 open » Battery select internal CN9 pins 2 & 3 closed Battery select external CN9 pins 1 & 2 closed » Monitor type select monochrome JP2 open Monitor type select color JP2 closed » BIOS type select 2764 JP4 pins 1 & 2 closed BIOS type select 27128 JP4 pins 2 & 3 closed » Factory configured - do not JP10 unknown alter » Factory configured - do not JP11 unknown alter » Factory configured - do not JP12 unknown alter DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 E1 - E8 512KB (18) 41256 NONE NONE NONE pins 1 & 2 closed 512KB NONE NONE (2) 256K NONE pins 2 & 3 x 9 closed 1MB (18) 41256 (18) 41256 NONE NONE pins 1 & 2 closed 1MB NONE NONE (2) 256K (2) 256K pins 2 & 3 x 9 x 9 closed 1.5MB (18) 41256 (18) 41256 (2) 256K NONE pins 1 & 2 x 9 closed 2MB (18) 41256 (18) 41256 (2) 256K (2) 256K pins 1 & 2 x 9 x 9 closed 2MB (18) NONE NONE NONE pins 1 & 2 411000 closed 2MB NONE NONE (2) 1M x NONE pins 2 & 3 9 closed 4MB (18) (18) NONE NONE pins 1 & 2 411000 411000 closed 4MB NONE NONE (2) 1M x (2) 1M x pins 2 & 3 9 9 closed 6MB (18) (18) (2) 1M x NONE pins 1 & 2 411000 411000 9 closed 8MB (18) (18) (2) 1M x (2) 1M x pins 1 & 2 411000 411000 9 9 closed DRAM MODE CONFIGURATION Mode DRAM type JP8 JP9 Page Mode (Four 100ns pins 1 & 2 pins 1 & 2 closed page) closed Page Mode (One 100ns pins 2 & 3 pins 1 & 2 closed page) closed Fast mode 100ns pins 1 & 2 pins 2 & 3 closed closed Slow mode 120ns pins 2 & 3 pins 2 & 3 closed closed