EPSON, INC. ACTION DESK 4000 Processor 80486SX/80487SX/80486DX/80486DX2 Processor Speed 25/33/50(internal)/66(internal)MHz Chip Set Unidentified Video Chip Set Cirrus Logic Maximum Onboard 64MB Memory Maximum Video 2MB Memory Cache 64/128/256KB BIOS Unidentified Dimensions 220mm x 220mm I/O Options Floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2), VGA port, riser slot NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location Floppy drive interface CN1 VGA port CN6 PS/2 mouse port CN2 IDE interface 1 CN7 Serial port 1 CN3 Front panel connector CN8 Serial port 2 CN4 Turbo switch J22 Parallel port CN5 Riser slot SL1 USER CONFIGURABLE SETTINGS Function Label Position » Parallel port LPT select LPT1 J5 Pins 1 & 2 closed Parallel port LPT select LPT2 J5 Pins 2 & 3 closed » Serial port 1 COM select COM1 J6 Pins 1 & 2 closed Serial port 1 COM select COM3 J6 Pins 2 & 3 closed » Serial port 2 COM select COM2 J7 Pins 1 & 2 closed Serial port 2 COM select COM4 J7 Pins 2 & 3 closed » Floppy drive interface enabled J8 Pins 1 & 2 closed Floppy drive interface disabled J8 Pins 2 & 3 closed » Turbo enabled J22 Open Turbo disabled J22 Closed » Battery type select internal J34 Pins 2 & 3 closed CMOS memory clear J34 Pins 3 & 4 closed » IDE interface enabled J35 Pins 1 & 2 closed IDE interface disabled J35 Pins 2 & 3 closed DRAM CONFIGURATION Size Bank 0 Bank 1 4MB (1) 1M x 36 None 5MB (1) 1M x 36 (1) 256K x 36 6MB (1) 1M x 36 (1) 512K x 36 8MB (1) 1M x 36 (1) 1M x 36 8MB (1) 2M x 36 None 9MB (1) 2M x 36 (1) 256K x 36 10MB (1) 2M x 36 (1) 512K x 36 12MB (1) 1M x 36 (1) 2M x 36 12MB (1) 2M x 36 (1) 1M x 36 16MB (1) 2M x 36 (1) 2M x 36 16MB (1) 4M x 36 None 17MB (1) 4M x 36 (1) 256K x 36 18MB (1) 4M x 36 (1) 512K x 36 20MB (1) 4M x 36 (1) 1M x 36 24MB (1) 4M x 36 (1) 2M x 36 32MB (1) 4M x 36 (1) 4M x 36 32MB (1) 8M x 36 None 33MB (1) 8M x 36 (1) 256K x 36 34MB (1) 8M x 36 (1) 512K x 36 36MB (1) 8M x 36 (1) 1M x 36 40MB (1) 8M x 36 (1) 2M x 36 48MB (1) 4M x 36 (1) 8M x 36 48MB (1) 8M x 36 (1) 4M x 36 64MB (1) 8M x 36 (1) 8M x 36 Note: The location of banks 0 & 1 are unidentified. CACHE CONFIGURATION Size Bank 0 Bank 1 TAG 64KB (4) 8K x 8 (4) 8K x 8 (1) 8K x 8 128KB (4) 32K x 8 None (1) 8K x 8 256KB (4) 32K x 8 (4) 32K x 8 (1) 32K x 8 Note: The location of banks 0 & 1 and the TAG are unidentified. CACHE JUMPER CONFIGURATION Size J25 J26 J27 J28 64KB Pins 1 & 2 Pins 1 & 2 Open Pins 2 & 3 closed closed closed 128KB Pins 2 & 3 Pins 1 & 2 Pins 1 & 2 Pins 1 & 2 closed closed closed closed 256KB Pins 2 & 3 Pins 2 & 3 Pins 2 & 3 Pins 2 & 3 closed closed closed closed VIDEO MEMORY CONFIGURATION Size Bank 0 Bank 1 1MB 1MB None 2MB 1MB (2) 256K x 16 Note: Bank 0 is factory installed and is not configurable. CPU SPEED SELECTION Speed J16 25MHz Pins 5 & 6 closed 33MHz Pins 1 & 2 closed 50iMHz Pins 5 & 6 closed 66iMHz Pins 1 & 2 closed CPU TYPE SELECTION Type J17 J19 80486SX Pins 2 & 3 closed Open 80487SX Pins 1 & 2, 3 & 4 Pins 2 & 3 closed closed 80486DX Pins 1 & 2, 3 & 4 Pins 1 & 2 closed closed 80486DX2 Pins 1 & 2, 3 & 4 Pins 1 & 2 closed closed