UNIDENTIFIED SEAT 286 Processor 80286 Processor Speed 12/16/20MHz Chip Set G-2 Max. Onboard DRAM 8MB (4MB on external memory card) Cache None BIOS Unidentified Dimensions 330mm x 218mm I/O Options 16-bit external memory card NPU Options 80287 [Image] CONNECTIONS Purpose Location Purpose Location Optional keyboard J1 Turbo LED J11 connector External battery J4 Reset switch J13 Power LED & keylock J10 Speaker J15 16-bit external memory SL1 card USER CONFIGURABLE SETTINGS Function Jumper/Switch Position » Battery select 3.6v internal J2 Closed Battery select 6V external J2 Open » Power good signal detect from J3 Pins 1 & 2 board closed Power good signal detect from J3 Pins 2 & 3 power supply closed » Monitor type select color J5 Closed Monitor type select J5 Open monochrome » BIOS type select 27256 J6 Pins 2 & 3 closed BIOS type select 27128 J6 Pins 1 & 2 closed » Factory configured - do not J7 N/A alter » Factory configured - do not J8 N/A alter » Parity check disabled J9 Pins 2 & 3 closed Parity check enabled J9 Pins 1 & 2 closed » I/O speed select half J12/1 On I/O speed select full J12/1 Off » Extended 384K RAM enabled J12/4 Off Extended 384K RAM disabled J12/4 On » DRAM type select 1M x 1 J12/6 On DRAM type select 256K x 4 J12/6 Off » NPU asynchronous with CPU J14 Pins 2 & 3 closed NPU synchronous with CPU J14 Pins 1 & 2 closed » Turbo enabled J16 Open Turbo disabled J16 Closed DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 Bank 4 512KB (4) 44256 NONE NONE NONE NONE 640KB (4) 44256 NONE (4) 4464 NONE NONE 1MB (4) 44256 (4) 44256 NONE NONE NONE 2MB NONE NONE NONE (16) NONE 421000 4MB NONE NONE NONE (16) (16) 421000 421000 PARITY CONFIGURATION Size P0 P1 P2 P3 512KB (2) 41256 NONE NONE NONE 640KB NONE NONE NONE NONE 1MB (2) 41256 (2) 41256 NONE NONE 2MB NONE NONE (2) 421000 NONE 4MB NONE NONE (2) 421000 (2) 421000 DRAM SWITCH CONFIGURATION Size J12/2 J12/3 J12/5 512KB Off Off Off 640KB Off Off On 1MB On Off Off 2MB Off Off Off 4MB On Off Off 8MB On On Off Note: J12/4 & J12/5 must be ON for 640KB