LASER COMPUTER, INC. LASER 286S Processor 80286 (exact location unidentified) Processor Speed 16MHz Chip Set Unidentified Maximum Onboard Memory 4MB Cache None BIOS AMI Dimensions 330mm x 218mm I/O Options Floppy drive interface, game port, IDE interface, parallel port, serial ports (2), riser slot NPU Options 80287 [Image] CONNECTIONS Function Label Function Label Front panel connector J4 IDE interface J10 Parallel port J5 Floppy drive interface J12 Game port J6 Speaker J15 Serial port 2 J7 IDE interface LED JP29 Serial port 1 J8 Riser slot SL1 External battery J9 USER CONFIGURABLE SETTINGS Setting Label Position Parallel port IRQ select IRQ5 JP16 Pins 2 & 3 closed Parallel port IRQ select IRQ7 JP16 Pins 1 & 2 closed Game port enabled JP17 Closed Game port disabled JP17 Open Parallel port address select 378 JP21 Pins 1 & 2 - 37Fh closed Parallel port address select 278 JP21 Pins 2 & 3 - 27Fh closed IDE interface enabled JP28 Closed IDE interface disabled JP28 Open Floppy drive interface enabled JP33 Open Floppy drive interface disabled JP33 Closed Parity enabled JP34 Closed Parity disabled JP34 Open » Factory configured - do not alter SW2/4 N/A » Factory configured - do not alter SW2/5 N/A » Factory configured - do not alter SW2/6 N/A Wait state select 0 wait states SW2/7 Off Wait state select 1 wait state SW2/7 On DRAM Size Bank 0 Parity 0 Bank 1 Parity 1 Bank 2 Bank 3 512KB (4) (2) None None None None 44256 41256 640KB (4) (2) (4) 4464 (2) None None 44256 41256 41256 1MB (4) (2) (4) (2) None None 44256 41256 44256 41256 1152KB (4) (2) (4) 4464 (2) (2) None 44256 41256 41256 256K x 9 1.5MB (4) (2) (4) (2) (2) None 44256 41256 44256 41256 256K x 9 1664KB (4) (2) (4) 4464 (2) (2) (2) 44256 41256 41256 256K x 256K x 9 9 2MB (4) (2) (4) (2) (2) (2) 44256 41256 44256 41256 256K x 256K x 9 9 2MB None None None None (2) 1M None x 9 4MB None None None None (2) 1M (2) 1M x 9 x 9 DRAM SWITCH Setting SW2/1 4464 installed in Bank 1 Off 4464 not installed in Bank 1 On Note: Economic system uses DIP & SIMM memory and Deluxe system uses 1M x 9 SIMM memory. DRAM SWITCH Setting SW2/2 SW2/3 Economic system On On Deluxe system Off Off Note: Economic system uses DIP & SIMM memory and Deluxe system uses 1M x 9 SIMM memory. DRAM SWITCH (ECONOMIC SYSTEM) Bank 0 Bank 1 256K SIMM SW2/8 SW2/9 SW2/10 Installed Not Not On On On installed installed Installed Installed Not On On Off installed Installed Installed Bank 0 On Off On Installed Installed Banks 0 & 1 On Off Off DRAM SWITCH (DELUXE SYSTEM) Bank 0 Bank 1 1M SIMM SW2/8 SW2/9 SW2/10 Not Not Bank 0 On On On installed installed Not Not Banks 0 On On Off installed installed & 1 SERIAL PORT IRQ Serial port 1 Serial port 2 JP18 JP19 » IRQ4 IRQ3 Pins 2 & 3 Pins 1 & 2 closed closed IRQ3 IRQ4 Pins 1 & 2 Pins 2 & 3 closed closed SERIAL PORT Serial port 1 Serial JP20 JP22 JP25 JP26 port 2 » COM1 COM2 1 & 2 2 & 3 N/A N/A COM1 COM3 1 & 2 N/A 2 & 3 N/A COM1 COM4 1 & 2 N/A N/A 2 & 3 COM2 COM1 2 & 3 1 & 2 N/A N/A COM2 COM3 N/A 1 & 2 2 & 3 N/A COM2 COM4 N/A 1 & 2 N/A 2 & 3 COM3 COM1 2 & 3 N/A 1 & 2 N/A COM3 COM2 N/A 2 & 3 1 & 2 N/A COM3 COM4 N/A N/A 1 & 2 2 & 3 COM4 COM1 2 & 3 N/A N/A 1 & 2 COM4 COM2 N/A 2 & 3 N/A 1 & 2 COM4 COM3 N/A N/A 2 & 3 1 & 2 Note: Pins designated should be in the closed position.