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