DIAMOND FLOWER, INC. 486SX-20/25UNB AIO Processor 80486SX/80487SX Processor Speed 20/25MHz Chip Set UMC Max. onboard DRAM 16MB Cache None BIOS AMI Dimensions 330mm x 218mm I/O Options Floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial port (2), VGA feature connector, VGA port NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location IDE interface CN1 Turbo switch J3 & J8 Floppy drive interface CN2 Reset switch J4 & J9 VGA feature connector CN3 IDE interface LED J5 VGA port CN4 Power LED & keylock J6 Parallel port CN5 Speaker J7 Bus mouse port CN6 External battery J10 Serial port (COM1) CN7 Serial port (COM2) JP31 Keyboard connector J1 Keyboard connector KBD1 Turbo LED J2 Riser card S1 USER CONFIGURABLE SETTINGS Function Jumper Position » Battery select internal J11 pins 2 & 3 closed Battery select external J11 pins 1 & 2 closed » Speaker select internal JP1 Closed Speaker select external JP1 Open » Factory configured - do not alter JP4 Open » Factory configured - do not alter JP5 pins 2 & 3 closed CPU speed select 20MHz JP6 Closed CPU speed select 25MHz JP6 Open » Factory configured - do not alter JP7 Open » BIOS type select 27C256 (32KB) JP8 pins 2 & 3 closed BIOS type select 27C512 (64KB) JP8 pins 1 & 2 closed » Factory configured - do not alter JP10 Open » Monitor type select color JP11 Closed Monitor type select monochrome JP11 Open » Factory configured - do not alter JP13 Open » Factory configured - do not alter JP14 Closed » Floppy drive interface enabled JP20 pins 1 & 2 closed Floppy drive interface disabled JP20 pins 2 & 3 closed » Factory configured - do not alter JP21 pins 1 & 2 closed » IDE interface enabled JP22 pins 1 & 2 closed IDE interface disabled JP22 pins 2 & 3 closed DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 1MB (1) 256K x NONE NONE NONE 36 2MB (1) 256K x (1) 256K x NONE NONE 36 36 3MB (1) 256K x (1) 256K x (1) 256K x NONE 36 36 36 4MB (1) 256K x (1) 256K x (1) 256K x (1) 256K x 36 36 36 36 4MB (1) 1M x 36 NONE NONE NONE 5MB (1) 256K x (1) 1M x 36 NONE NONE 36 6MB (1) 256K x (1) 256K x (1) 1M x 36 NONE 36 36 8MB (1) 1M x 36 (1) 1M x 36 NONE NONE 9MB (1) 256K x (1) 1M x 36 (1) 1M x 36 NONE 36 10MB (1) 256K x (1) 256K x (1) 1M x 36 (1) 1M x 36 36 36 12MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 NONE 16MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 SERIAL PORT CONFIGURATION Port 1 (C2) Port 2 (C1) JP17 JP18 JP19 » COM1 COM2 pins 1 & 2 pins 1 & 2 pins 1 & 2 closed closed closed COM1 Disabled pins 1 & 2 pins 2 & 3 pins 1 & 2 closed closed closed Disabled COM2 pins 2 & 3 pins 1 & 2 pins 1 & 2 closed closed closed `COM2 Disabled pins 1 & 2 pins 2 & 3 pins 2 & 3 closed closed closed COM2 COM1 pins 1 & 2 pins 1 & 2 pins 2 & 3 closed closed closed Disabled COM1 pins 2 & 3 pins 1 & 2 pins 2 & 3 closed closed closed Disabled Disabled pins 2 & 3 pins 2 & 3 Open closed closed SERIAL PORTS 1 & 2 NORMAL/FORCED TRUE CONFIGURATION Port 1 Port 2 JP24 JP25 JP26 (CN7) (JP31) Normal Normal pins 1 & 2 pins 1 & 2 pins 1 & 2 closed closed closed Forced Forced true pins 2 & 3 pins 2 & 3 pins 2 & 3 true closed closed closed SERIAL PORT DTE/DCE CONFIGURATION Function JP30 » Serial Port 1 (CN7) DTE Pins 1 & 2, 3 & 4, and 5 & 6 closed Serial Port 1 (CN7)DCE Pins 1 & 3, 2 & 4, and 6 & 8 closed SERIAL PORT DTE/DCE CONFIGURATION Function JP23 » Serial Port 2 (JP23) DTE Pins 7 & 8 and 9 & 10 closed Serial Port 2 (JP23) DCE Pins 5 & 7 and 9 & 10 closed PARALLEL PORT 1 (CN5) CONFIGURATION LPT I/O Address Interrupt JP9 JP15 JP16 LPT 1 3BC-3BEh IRQ7 pins 1 pins 2 pins 1 & & 2 & 3 2 LPT 2 378-37Ah IRQ7 pins 1 pins 1 pins 1 & & 2 & 2 2 LPT 3 278-27Ah IRQ5 pins 2 pins 1 pins 2 & & 3 & 2 3 Disabled N/A N/A N/A pins 2 pins 2 & & 3 3 Note:Pins designated should be in the closed position. VRAM CONFIGURATION Size VRAM Location 512KB (4) 44256 Bank 0 1024KB (8) 44256 Bank 0 & 1 ONBOARD VGA CONFIGURATION Mode IRQ JP2 JP3 JP12 » Enabled 2/9 pins 2 & 3 pins 1 & 2 Closed closed closed Disabled 2/9 Closed Open Open