UNIDENTIFIED CMC-820 Processor 80386DX Processor Speed 10/20MHz Chip Set C & T Max. onboard DRAM 16MB Cache None BIOS Unknown Dimensions 330mm x 218mm I/O Options 32-bit external memory cards (2) NPU Options 80387DX/3167 [Image] CONNECTIONS Purpose Location Purpose Location External battery J1 Speaker J11 Turbo LED J7 Keylock J12 Reset Switch J10 32-bit system memory S1 & S2 cards USER CONFIGURABLE SETTINGS Function Jumper/Switch Position » BIOS type select 27128 or J3 pins 1 & 2 27256 closed BIOS type select 27512 J3 pins 2 & 3 closed » Monitor type select color J5 Closed Monitor type select J5 Open monochrome » NPU enabled J6 Closed NPU disabled J6 Open » NPU type select Intel or J9 Closed 80387 NPU type select Weitek 3167 J9 Open DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 1MB (4) 256K x 9 NONE NONE NONE 2MB (4) 256K x 9 (4) 256K x 9 NONE NONE 4MB (4) 256K x 9 (4) 256K x 9 (4) 256K x 9 (4) 256K x 9 4MB (4) 1M x 9 NONE NONE NONE 8MB (4) 1M x 9 (4) 1M x 9 NONE NONE 10MB (4) 256K x 9 (4) 256K x 9 (4) 1M x 9 (4) 1M x 9 16MB (4) 1M x 9 (4) 1M x 9 (4) 1M x 9 (4) 1M x 9 Note:The numbering of bank 0 and bank 1 are located on the system board. Banks 2 & 3 are located on the external memory card. CPU SPEED CONFIGURATION Speed J4 J8 10MHz pins 2 & 3 closed pins 1 & 2 closed 20MHz pins 1 & 2 closed pins 2 & 3 closed [Image] CONNECTIONS Purpose Location Purpose Location Serial port DB-9 J101 Parallel port DB-9 J103 Serial port 10-pins J102 Parallel port J104 header 10-pins header I/O CONFIGURATION Port SW1/switch 1 SW1/switch 2 SW1/switch 3 SW1/switch 4 Serial port On Off On On DB-9 Serial port On On On Off 10-pins header Parallel On On Off On port DB-9 Parallel Off On On On port 10-pins header