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Z-159

ZENITH DATA SYSTEMS

Z-159

Processor

8088

Processor Speed

4.77/8MHz

Chip Set

Unidentified

Video Chip Set

None

Maximum Onboard Memory

1.2MB

Maximum Video Memory

None

Cache

None

BIOS

Unidentified

Dimensions

Unidentified

I/O Options

External memory card, CPU slot

NPU Options

8087

CONNECTIONS

Purpose

Location

Purpose

Location

Video slot

SL1

Floppy drive slot

SL4

Hard drive slot

SL2

Memory slot

SL5

CPU slot

SL3

   

CONNECTIONS

Purpose

Location

Clock speed switch

CN1

USER CONFIGURABLE SETTINGS

Function

Label

Position

 

Floppy drives enabled

SW101/0

Off

 

Floppy drives disabled

SW101/0

On

 

NPU not installed

SW101/1

On

 

NPU installed

SW101/1

Off

 

Memory wait state select 3 wait states

SW101/2

Off

 

Memory wait state select 0 wait state

SW101/2

On

 

Monitor ROM RAM protected

SW101/3

Off

 

Monitor ROM RAM unprotected

SW101/3

On

Factory configured - do not alter

SW102/0

On

 

Video refresh rate select 50Hz

SW102/7

Off

 

Video refresh rate select 60Hz

SW102/7

On

DRAM CONFIGURATION

Note: The size of the memory chips is unidentified.

DRAM JUMPER CONFIGURATION

Size

SW102/1

SW102/2

SW102/3

SW102/4

256KB

Off

Off

On

On

320KB

On

On

Off

On

384KB

Off

On

Off

On

448KB

On

Off

Off

On

512KB

Off

Off

Off

On

576KB

On

On

On

Off

640KB

Off

On

On

Off

SYSTEM AUTO BOOT CONFIGURATION

Setting

SW102/5

SW102/6

Monitor

On

On

Floppy drive

Off

On

Hard drive

On

Off

FLOPPY DRIVE SELECTION

Drives installed

SW101/6

SW101/7

1

On

On

2

Off

On

3

On

Off

4

Off

Off

MONITOR SELECTION

Drives installed

SW101/4

SW101/5

EGA

On

On

Color (40 x 25)

Off

On

Color (80 x 25)

On

Off

Monochrome

Off

Off

CONNECTIONS

Purpose

Location

Parallel port

CN1

USER CONFIGURABLE SETTINGS

Function

Label

Position

EMS RAM has system RAM

SW401/1

Off

 

EMS RAM only

SW401/1

On

Memory size select 640KB

SW401/2

Off

 

Memory size select 512KB

SW401/2

On

EMS RAM disabled

SW401/3

On

 

EMS RAM enabled

SW401/3

Off

EMS frame address select D0000 DFFFF

SW401/4

Off

 

EMS frame address select E0000 EFFFF

SW401/4

On

Parallel port IRQ7 enabled

SW401/7

On

 

Parallel port IRQ7 disabled

SW401/7

Off

EMS upgrade not installed

SW401/10

Off

 

EMS upgrade installed

SW401/10

On

EMC CARD SELECTION

Card

SW401/5

SW401/6

1

On

On

2

On

Off

3

Off

On

4

Off

Off

PARALLEL PORT ADDRESS SELECTION

Setting

SW401/8

SW401/9

LPT1 (378 - 37A)

Off

On

LPT2 (3BC 3BE)

On

Off

278 27A

On

On

Disabled

Off

Off