DD & TT ENTERPRISE USA COMPANY DT ESCORT SYSTEM BOARD A Processor 80386SX/80486SLC Processor Speed 25/33/40MHz Chip Set Symphony Max. Onboard DRAM 16MB Cache None 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 80387SX/CX487SLC [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 port J10 Power LED & keylock J13B IDE interface J11 Proprietary riser S1 card slot USER CONFIGURABLE SETTINGS Function Jumper 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 closed 3FO-3F7 Floppy drive address select E1 pins 9 & 11 closed 370-377 » IDE interface disabled E1 pins 2 & 4 closed IDE interface enabled E1 pins 4 & 6 closed IDE interface address E1 pins 8 & 10 closed 3FO-3F7, 1FO-1F7 IDE interface address E1 pins 20 & 12 closed 370-377, 170-177 » On board video enabled E2 pins 1 & 2, 3 & 4, 5 & 6 closed On board 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 only E6 pins 2 & 4, 7 & 9, 8 & 10 closed » BIOS device select read/write E6 pins 4 & 6, 9 & 11, 10 & 12 » Chipset mode select 2x for E7 pins 3 & 5 closed 40MHz or less Chipset mode select 1x for E7 pins 1 & 3 closed true 50MHz only Chipset mode RDY1 set for 1X E7 pins 4 & 6 closed mode Chipset mode RDY2 set for 2X E7 pins 2 & 4 closed mode » Chipset mode burst rate E8 pins 23 & 24 closed select 3-2-2-2 Chipset mode burst rate E8 pins 23 & 24 open select 2-1-1-1 » Chipset mode write select 0 E8 pins 25 & 26 closed wait state Chipset mode write select 1 E8 pins 25 & 26 open wait state » PS/2 mouse enable at IRQ12 E10 Closed PS/2 mouse disable E10 Open » CMOS memory normal E11 Open CMOS memory clear E11 Closed » CPU speed select iOSC/2 E12 pins 2 & 3 closed CPU speed select iOSC/1 E12 pins 1 & 2 closed » Factory configured - do not E15 pins 1 & 2 closed alter » Factory configured - do not E16/1, 3 & 5 pins 3 & 5 closed alter » Factory configured - do not E16/2, 4, & pins 4 & 6 closed alter 6 » Factory configured - do not E16/7, 9 & pins 9 & 11 closed alter 11 » Factory configured - do not E16/7 & 8 Closed alter » Factory configured - do not E16/8 & 10 N/A alter » Factory configured - do not E16/11 & 12 Open alter USER CONFIGURABLE SETTINGS (CONTINUED) Function Jumper Position » Factory configured - do not E16/13 & 14 Closed alter » Factory configured - do not E16/15 & 16 Closed alter » Factory configured - do not E16/17 & 18 Closed alter 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 512KB (2) 256K x 9 NONE 1MB (2) 256K x 9 (2) 256K x 9 2MB (2) 1M x 9 NONE 2.5MB (2) 256K x 9 (2) 1M x 9 4MB (2) 1M x 9 (2) 1M x 9 8MB (2) 4M x 9 NONE 8.5MB (2) 256K x 9 (2) 4M x 9 10MB (2) 1M x 9 (2) 4M x 9 16MB (2) 4M x 9 (2) 4M x 9 16MB (2) 16M x 9 (2) 16M x 9 CPU SPEED CONFIGURATION Speed E14/pins 1 & 2 E14/pins 3 & 4 E14/pins 5 & 6 25MHz Open Closed Closed 33MHz Open Closed Open 40MHz Open Open Closed 25MHz Open Closed Closed 33MHz Open Closed Open SERIAL PORT A (J3) CONFIGURATION COM I/O Address E5 » COM1 3F8h pins 3 & 5, 2 & 4, 7 & 8 COM3 3E8h pins 1 & 3, 4 & 6, 7 & 8 COM4 2E8h pins 3 & 5, 4 & 6, 7 & 8 Disabled N/A pins 1 & 3, 2 & 4 Note: pins designated should be in the closed position. SERIAL PORT B (J4) CONFIGURATION COM I/O Address E4 » COM2 2F8h pins 3 & 5, 2 & 4, 7 & 8 COM3 3E8h pins 3 & 5, 4 & 6, 7 & 8 COM4 2E8h pins 1 & 3, 4 & 6, 7 & 8 Disabled N/A pins 1 & 3, 2 & 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.