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MICROENHANCER EV-659A

EVEREX SYSTEMS, INC.

MICROENHANCER EV-659A

Category

Video

Video Types Supported

CGA/EGA/Monochrome

Video Processor

Unidentified

Highest Resolution Supported

640 x 350

Data Bus Type

8-Bit ISA

Memory Type

DRAM

Maximum Onboard Memory

256KB (Exact location of memory is unidentified)

CONNECTIONS

Purpose

Location

Purpose

Location

RCA Jack

J1

15-pin analog video port

P2

RCA Jack

J2

VGA feature connector

P3

VIDEO PORT ADDRESS SELECTION

Address

W5

3xx

Pins 2 & 3 closed

 

2xx

Pins 1 & 2 closed

VIDEO EMULATION CONFIGURATION

Setting

Autoswitch

SW1/5

SW1/6

Hercules emulation disabled

Disabled

Off

Off

 

Hercules emulation enabled

Enabled

On

On

MONITOR TYPE CONFIGURATION

Type

Mode

SW1/1

SW1/2

SW1/3

SW1/4

SW1/7

SW1/8

EGA

EGA 80 x 25

Off

On

On

Off

On

On

 

EGA

CGA 80 x 25

On

On

On

Off

On

On

 

CGA

CGA 80 x 25

Off

Off

Off

On

On

Off

 

CGA

CGA 40 x 25

On

Off

Off

On

On

Off

 

Monochrome

Monochrome

Off

Off

On

Off

Off

Off

VIDEO INTERRUPT SELECTION

IRQ

W12/1

W12/2

W12/3

W12/4

W12/5

W12/6

W12/7

Non Maskable Interrupt

Closed

Open

Open

Open

Open

Open

Open

 

2

Open

Closed

Open

Open

Open

Open

Open

 

3

Open

Open

Closed

Open

Open

Open

Open

 

4

Open

Open

Open

Closed

Open

Open

Open

 

5

Open

Open

Open

Open

Closed

Open

Open

 

6

Open

Open

Open

Open

Open

Closed

Open

 

7

Open

Open

Open

Open

Open

Open

Closed

INTERRUPT TYPE CONFIGURATION

Type

W6

Non Maskable

Pins 2 & 3 closed

 

Normal

Pins 1 & 2 closed

FACTORY CONFIGURED - DO NOT ALTER

Jumper

Position

W8

Pins 1 & 2 closed

W11

Open