AMPRO COMPUTERS, INC. LITTLE BOARD/486 Processor 80486SX/80487SX/80486DX Processor Speed 20/33MHz Chip Set Ampro Max. onboard DRAM 16MB Cache 32KB optional (location unknown) BIOS Award Dimensions 330mm x 218mm I/O Options Floppy drive interface, IDE interface, parallel port, SCSI connector, serial ports (2) NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location Power connector J1 Parallel port J6 Serial port (COM2) J2 SCSI interface J7 Serial port (COM1) J3 Floppy drive interface J8 Utility connector J4 IDE interface J11 Keyboard J5 Power J1-1 to +12V BUS W7 USER CONFIGURABLE SETTINGS Function Jumper/Switch Position » SCSI controller enabled W1 Closed SCSI controller disabled W1 Open » Factory configured - do not W3 N/A alter » SCSI controller select IRQ15 W5 Open SCSI controller select IRQ11 W5 Closed » SCSI termination power enabled W6 Open SCSI termination power W6 Closed disabled » Factory configured - do not W10 Closed alter » Factory configured - do not W11 pins 1 & 2 alter closed » Flash EPROM programming power W16 Open enabled Flash EPROm programming power W16 Closed disabled » Watchdog timer select I/O CHCK W17 pins 1 & 2 closed Watchdog timer select reset W17 pins 2 & 3 closed Watchdog timer disabled W17 Open » Floppy drive interface enabled W18 Open Floppy drive interface W18 Closed disabled » Floppy precompensation (PCVAL) W19 Open selection Floppy precompensation (PCVAL) W19 Closed none » Floppy drive select IRQ6 W20 & W27 Closed Floppy drive select IRQ6 W20 & W27 Open disabled » External cache enabled W21 Open External cache disabled W21 Closed » Factory configured - do not W22 N/A alter » Power fail NMI enabled W23 Open Power fail NMI disabled W23 Closed » Parallel port interrrupt W24 Open option select via setup Parallel port interrrupt W24 Closed option disabled Note: W18 may either be an option or is not user configurable. DRAM CONFIGURATION Size Bank 0 1MB (4) 256K x 9 4MB (4) 1M x 9 16MB (4) 4M x 9 CACHE CONFIGURATION Cache DRAM U9 U10 Tag U12 Tag U13 32KB 4MB (2) 8K x (2) 8K x (2) 8K x NONE 8 8 8 32KB 16MB (2) 8K x (2) 8K x (2) 8K x (2) 8K x 8 8 8 8 EPROM CONFIGURATION (S0) EPROM W8 W9 W25 27C256 Open pins 7 & 8, 10 & 11 pins 1 & 2 27C512 Open pins 1 & 4, 7 & 8, 10 pins 1 & 2 & 11 27C010 Open pins 1 & 4, 2 & 5, 6 & pins 1 & 2 9, 7 & 8 27C020 Open pins 1 & 4, 2 & 5, 6 & pins 1 & 2 9, 7 & 8, 11 & 12 27C040 Open pins 1 & 4, 2 & 3, 6 & pins 1 & 2 9, 7 & 8, 11 & 12 27C080 Closed pins 1 & 4, 2 & 3, 7 & pins 1 & 2 8, 11 & 12 62256 Open pins 4 & 7, 5 & 8, 10 pins 1 & 2 & 11 or 2 & 3 628128 Open pins 1 & 2, 4 & 7, 5 & pins 1 & 2 8, 10 & 11 or 2 & 3 uPD434000 Open pins 1 & 2, 3 & 6, 4 & pins 1 & 2 7, 5 & 8, 11 & 12 or 2 & 3 28F256 Open pins 2 & 5, 6 & 9, 7 & pins 1 & 2 8 28F512 Open pins 1 & 4, 2 & 5, 6 & pins 1 & 2 9, 7 & 8 28F010 Open pins 1 & 4, 2 & 5, 6 & pins 1 & 2 9, 7 & 8 28F020 Open pins 1 & 4, 2 & 5, 6 & pins 1 & 2 9, 7 & 8, 11 & 12 Note:Pins designated should be in the closed position. EPROM/FLASH EPROM CONFIGURATION (S1 & S2) EPROM W12 W13 W14 W15 128KB pins 2 & 3 pins 2 & 3 pins 2 & 3 pins 2 & 3 closed closed closed closed 256KB pins 2 & 3 pins 2 & 3 pins 2 & 3 pins 2 & 3 closed closed closed closed SCSI CONTROLLER CONFIGURATION DMA W2 W4 6 pins 1 & 2 closed Open 0 pins 2 & 3 closed Closed UTILITY CONNECTOR (J4) PIN CONFIGURATION Pin Signal Name Function 1 Speaker Audio signal 2 Speaker Ground 3 Ground To one side of Reset button 4 Reset To other side of Reset button 5 LED Cathode Ground return 6 LED anode Current source (+5v through 330 ohms) 7 Ground Ground return 8 +12V power Connected to P1 pin B9 9 -5V power Connected to P1 pin B5 10 -12V power Connected to P1 pin B7 11 Ground Ground return 12 POWERGOOD Power supply status WATCHDOG TIMER CONFIGURATION Setting W17 W23 Disabled Open Open IOCHCK (NMI) Pins 1 & 2 closed Open Reset pins 2 & 3 closed N/A Note:I/O channel check is the bus signal that triggers a non-maskable interrupt (NMI) Reset is a hard reset signal, the same as pressing the reset button.