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B158
UNIDENTIFIED
B158
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Processor
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V 20 (exact location unidentified)
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Processor Speed
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4MHz
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Chip Set
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Unidentified
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|
Video Chip Set
|
None
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Maximum Onboard Memory
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1MB
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Maximum Video Memory
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None
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Cache
|
None
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BIOS
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NEL
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Dimensions
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254mm x 218mm
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I/O Options
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None
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|
NPU Options
|
8087 (exact location unidentified)
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CONNECTIONS
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|
Purpose
|
Location
|
Purpose
|
Location
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Keylock
|
J1
|
Turbo LED
|
J4
|
|
Speaker
|
J2
|
Turbo switch
|
J5
|
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Power LED
|
J3
|
Reset switch
|
J6
|
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USER CONFIGURABLE SETTINGS
|
|
Function
|
Label
|
Position
|
|
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DRAM parity check disabled
|
SWA/1
|
On
|
|
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DRAM parity check enabled
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SWA/1
|
Off
|
|
»
|
Factory configured - do not alter
|
SWA/2
|
On
|
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DRAM CONFIGURATION
|
|
Size
|
Bank 0
|
Bank 1
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Bank 2
|
Bank 2A
|
Bank 3
|
Bank 3A
|
Bank 4
|
|
512KB
|
(9) 41256
|
(9) 41256
|
None
|
None
|
None
|
None
|
None
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|
640KB
|
(9) 41256
|
(9) 41256
|
(2) 4464
|
(1) 4164
|
(2) 4464
|
(1) 4164
|
None
|
|
1MB
|
None
|
None
|
None
|
None
|
None
|
None
|
(9) 411000
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|
DRAM JUMPER/SWITCH CONFIGURATION
|
|
Size
|
JP1
|
SWA/3
|
SWA/4
|
|
None
|
Closed
|
On
|
On
|
|
512KB
|
Closed
|
Off
|
On
|
|
640KB
|
Closed
|
On
|
Off
|
|
1MB
|
Open
|
Off
|
Off
|
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MONITOR SELECTION
|
|
Setting
|
SWA/5
|
SWA/6
|
|
None
|
On
|
On
|
|
Monochrome
|
Off
|
Off
|
|
Color 40 x 25
|
Off
|
On
|
|
Color 80 x 25
|
On
|
Off
|
|
FLOPPY DRIVE SELECTION
|
|
Drives installed
|
SWA/7
|
SWA/8
|
|
1
|
On
|
On
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|
2
|
Off
|
On
|
|
3
|
On
|
Off
|
|
4
|
Off
|
Off
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|