ZENITH DATA SYSTEMS Z-2500 SERIES Processor 80286 Processor Speed 12MHz Chip Set Unidentified Video Chip Set None Maximum Onboard Memory 6MB Maximum Video Memory None Cache None BIOS Unidentified Dimensions 330mm x 218mm I/O Options None NPU Options 80287 [Image] USER CONFIGURABLE SETTINGS Function Label Position » Factory configured - do not J101 Open alter » NPU clock mode select mode /3 J103 Closed for 80287, /2 for 80C287 NPU clock mode select direct J103 Open mode Parallel printer decode J106 Unidentified » ROM DMA blocked J113 Pins 1 & 2 closed ROM DMA not blocked J113 Pins 2 & 3 closed » Speaker enabled J114 Closed Speaker disabled J114 Open DRAM CONFIGURATION Size Bank 0 Bank 1 1MB (4) 256K x 9 None 3MB (4) 256K x 9 (2) 1M x 9 6MB (4) 1M x 9 (2) 1M x 9 DRAM TYPE SELECTION Type J102 256K x 9 in Bank 0 Pins 2 & 3 closed 1M x 9 in Banks 0 & 1 Pins 1 & 2 closed SCP SPEED SELECTION Speed P113 7.16MHz Pins 1 & 2 closed » 8MHz Pins 5 & 6 closed 12MHz Pins 3 & 4 closed NPU SPEED SELECTION Clock speed 80287 80C287 P113 8MHz 2.7MHz 4MHz Pins 9 & 10 closed » 16MHz 5.3MHz 8MHz Pins 13 & 14 closed 24MHz 8MHz 12Hz Pins 7 & 8 closed Note: See also J103 setting. POACH SELECTION Setting J115 J116 » POACH 1 chip installed Pins 2 & 3 closed Pins 2 & 3 closed in U169 POACH 7 chip installed Pins 1 & 2 closed Pins 1 & 2 closed in U169