DD & TT ENTERPRISE USA COMPANY DT ESCORT SYSTEM BOARD B Processor 80486SX/80486DX/ODP486SX/80486DX2 Processor Speed 16/20/25/33/50(internal)/50/66(internal)MHz Chip Set OPTI Max. Onboard DRAM 32MB Cache 64KB/256KB BIOS AMI Dimensions 330mm x 218mm I/O Options Floppy drive interface, IDE interface parallel port, Proprietary EISA riser card slot, PS/2 mouse port, Serial port (2), VGA port, video feature connector NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location PS/2 mouse port J2 Reset switch J12A Serial port (COM 1) J3 Turbo switch J12B Serial port (COM 2) J4 Turbo LED J12C Parallel port J5 IDE interface LED J12D VGA port J6 Not used J12E Floppy drive J9 Speaker J13A interface Video feature J10 Power LED & keylock J13B connector IDE interface J11 Proprietary EISA S1 riser card slot USER CONFIGURABLE SETTINGS Function Jumper/Switch Position » Floppy drive disabled E1 Pins 1 & 3 closed Floppy drive enabled E1 Pins 3 & 5 closed Floppy drive address select E1 Pins 7 & 9 3FO-3F7 closed Floppy drive address select E1 Pins 9 & 11 370-377 closed » IDE interface disabled E1 Pins 2 & 4 closed IDE interface enabled E1 Pins 4 & 6 closed IDE interface address E1 Pins 8 & 10 select 3FO-3F7, 1FO-1F7 closed IDE interface address E1 Pins 10 & 12 select 370-377, 170-177 closed » Onboard video enabled E2 Pins 1 & 2, 3 & 4, 5 & 6 closed Onboard video disabled E2 Pins 1 & 2, 3 & 4, 5 & 6 open » BIOS device select 1MB E6 Pins 1 & 2 closed BIOS device select 2MB E6 Pins 3 & 5 closed BIOS device select read E6 Pins 2 & 4, 7 & only 9, 8 & 10 closed BIOS device select E6 Pins 4 & 6, 9 & read/write 11, 10 & 12 » Chipset mode select 2x for E7 Pins 3 & 5 40MHz or less closed Chipset mode select 1x for E7 Pins 1 & 3 true 50MHz only closed Chipset mode RDY1 set for E7 Pins 4 & 6 1X mode closed Chipset mode RDY2 set for E7 Pins 2 & 4 2X mode closed » Chipset mode burst rate E8 Pins 23 & 24 select 3-2-2-2 closed Chipset mode burst rate E8 Pins 23 & 24 select 2-1-1-1 open » Chipset mode write states E8 Pins 25 & 26 select 0 wait state closed Chipset mode write states E8 Pins 25 & 26 select 1 wait state open » Factory configured - do not E9 Pins 39 & 40 alter closed » PS/2 mouse enable at IRQ12 E10 Closed PS/2 mouse disable E10 Open » Factory configured do not E11 Unknown alter » CPU clock select mode 2X E12 Pins 2 & 3 closed CPU clock select mode 1 x E12 Pins 1 & 2 for 486DX 50MHz closed » Factory configured - do not E15 Pins 1 & 2 alter closed Note: If there is no monochrome Hercules card present then the system will automatically assume that address 378h is LPT1 and address 278h is LPT2 pins designated should be in the closed position. DRAM CONFIGURATION Size Bank 0 Bank 1 1MB (4) 256K x 9 None 2MB (4) 256K x 9 (4) 256K x 9 4MB (4) 1M x 9 None 5MB (4) 256K x 9 (4) 1M x 9 8MB (4) 4M x 9 None 16MB (4) 4M x 9 (4) 4M x 9 17MB (4) 256K x 9 (4) 4M x 9 20MB (4) 1M x 9 (4) 4M x 9 32MB (4) 4M x 9 (4) 4M x 9 SRAM CONFIGURATION Size Cache Location TAG 64KB (8) 8K x 8 Bank 0 & 1 (1) 8K x 4 256KB (8) 32K x 8 Bank 0 & 1 (1) 32K x 4 SRAM JUMPER CONFIGURATION E9 64KB 256KB Pins 1, 3, 5 Pins 1 & 3 closed Pins 3 & 5 closed Pins 2, 4, 6 Pins 2 & 4 closed Pins 2 & 4 closed Pins 7, 9, 11 Pins 7 & 9 closed Pins 9 & 11 closed Pins 8, 10, 12 Open Pins 8 & 10 closed Pins 13, 15, 17 Pins 15 & 17 closed Pins 15 & 17 closed Pins 14, 16, 18 Pins 14 & 16 closed Pins 14 & 16 closed Pins 19, 21, 23 Pins 21 & 23 closed Pins 21 & 23 closed Pins 20, 22, 24 Open Pins 20 & 22 closed Pins 26, 28, 30 Pins 26 & 28 closed Pins 26 & 28 closed Pins 31, 33, 35 Pins 33 & 35 closed Pins 33 & 35 closed Pins 32, 34, 36 Pins 34 & 36 closed Pins 34 & 36 closed Pins 37 & 38 Open Closed Note: For non-cache configuration pins 25, 26, & 27 should be in the closed position. NON CACHE CONFIGURATION E16 Pins 1-3-5 Pins 2-4-6 Pins 8 & 10, Pins 13 & 15 & 16, 7-9-11 11 & 12 14 17 & 18 3 & 5 2 & 4 7 & 9 Closed Closed Open closed closed closed CPU TYPE CONFIGURATION Jumper 80486DX/80486DX2 80386SX/80486SLC E8/pins 1, 3, 5 Pins 1 & 3 closed Pins 3 & 5 closed E8/pins 2, 4, 6 Pins 2 & 4 closed Pins 4 & 6 closed E8/pins 7, 9, 11 Pins 7 & 9 closed Pins 9 & 11 closed E8/pins 8, 10, Pins 8 & 10 closed Pins 10 & 12 closed 12 E8/pins 13 & 14 Closed Open E8/pins 15 & 16 Open Closed E8/pins 17 & 18 Closed Open E8/pins 19 & 20 Closed Open E8/pins 21 & 22 Open Closed E13/pins 1 & 2, Pins 1 & 2, 3 & 4, 5 & 6 Pins 2 & 3 closed 3 & 4, 5 & 6 closed Note: settings for the 80386SX and 80486SLC are factory configured and should not be altered. CPU SPEED CONFIGURATION Speed U51 U52 Pins 1 Pins 3 Pins 5 Pins 7 & 2 & 4 & 6 & 8 16MHz Installed Empty Closed Open Closed N/A 16MHz Empty Installed Closed Open Closed Closed 20MHz Installed Empty Closed Open Open N/A 20MHz Empty Installed Open Open Closed Closed 25MHz Installed Empty Open Closed Closed N/A 25MHz Empty Installed Closed Closed Open Closed 33MHz Installed Empty Open Closed Open N/A 33MHz Empty Installed Open Closed Open Closed 40MHz Installed Empty Open Open Closed N/A 40MHz Empty Installed Closed Open Open Closed 50MHz Installed Empty Open Closed Closed N/A 50MHz Empty Installed Closed Closed Open Closed SERIAL PORT A (J3) CONFIGURATION COM I/O Address E4 E5 » COM1 3F8h Pins 3 & 5, 2 Pins 3 & 5, 2 & 4, 7 & 8 & 4, 7 & 8 COM3 3E8h Pins 1 & 3, 4 Pins 1 & 3, 4 & 6, 7 & 8 & 6, 7 & 8 COM4 2E8h Pins 3 & 5, 4 Pins 3 & 5, 4 & 6, 7 & 8 & 6 Disabled N/A Pins 1 & 3, 2 Pins 1 & 3, 2 & 4 & 4 Note: Pins designated should be in the closed position. SERIAL PORT B (J4) CONFIGURATION COM I/O Address E4 E5 » COM2 2F8h Pins 3 & 5, 2 Pins 3 & 5, 2 & 4, 7 & 8 & 4, 7 & 8 COM3 3E8h Pins 1 & 3, 4 Pins 1 & 3, 4 & 6, 7 & 8 & 6, 7 & 8 COM4 2E8h Pins 3 & 5, 4 Pins 3 & 5, 4 & 6, 7 & 8 & 6 Disabled N/A Pins 1 & 3, 2 Pins 1 & 3, 2 & 4 & 4 Note: Pins designated should be in the closed position. PARALLEL PORT (J5) CONFIGURATION COM IRQ I/O Address E3 » LPT1 IRQ7 3BCh Pins 3 & 5, 4 & 6, 7 & 8 LPT1 IRQ5 3BCh Pins 3 & 5, 4 & 6, 9 & 10 LPT2 IRQ7 378h Pins 3 & 5, 2 & 6, 7 & 8 LPT2 IRQ5 378h Pins 3 & 5, 2 & 6, 9 & 10 LPT3 IRQ7 278h Pins 1 & 3, 4 & 6, 7 & 8 LPT3 IRQ5 278h Pins 1 & 3, 4 & 6, 9 & 10 Disabled N/A N/A Pins 1 & 3, 2 & 4 Note: Pins designated should be in the closed position. VIDEO MEMORY CONFIGURATION Size Bank 0 Bank 1 512KB (4) 44256 NONE 1024KB (4) 44256 (4) 44256 Note: Bank 0 is permanently soldered onto the board.