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Gespac GESSBS-40

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Jumper Settings

Device Type

Mainboard

Processor

68040

Processor Speed

33MHz

Chip Set

Unidentified

Video Chip Set

None

Maximum Onboard Memory

None

Maximum Video Memory

None

Cache

Unidentified

BIOS

Unidentified

Dimensions

160mm x 100mm

I/O Options

Serial ports (2), G-96 bus interface, I/O interface connector, XSB local expansion submodule buses (2)

NPU Options

None

34762-1.png

CONNECTIONS

Purpose

Location

Purpose

Location

Multi processor module

C1

Serial port 1

P4

G-96 bus interface

P1

XSB local expansion submodule bus

P5

I/O interface connector

P2

XSB local expansion submodule bus

P6

Serial port 2

P3

Reset/abort switch

P7

USER CONFIGURABLE SETTINGS

Function

Label

Position

 

EPROM size select 64K x 16 or 128K x 16

J1

Pins 1 & 2 closed

 

EPROM size select 256K x 16

J1

Pins 2 & 3 closed

 

RTC battery disabled

J2

Pins 1 & 4 closed

 

RTC battery enabled

J2

Pins 2 & 3 closed

 

Cache enabled

J4/pins 1 & 4

Open

 

Cache disabled

J4/pins 1 & 4

Closed

 

PNMU enabled

J4/pins 2 & 3

Open

 

PNMU disabled

J4/pins 2 & 3

Closed

 

Base address select for dual ported RAM < 32MB

J5

Pins 1 & 2 closed

 

Base address select for dual ported RAM > 32MB

J5

Pins 2 & 3 closed

 

SYSCLK speed select CPU = SYSCLK

J6

Pins 1 & 2 closed

 

SYSCLK speed select CPU = SYSCLK/2

J6

Pins 2 & 3 closed

 

External cache access enabled

J7

Open

 

External cache access disabled

J7

Closed

 

Enable & SYSCLK and BGRT driven

J8

Pins 2 & 3 closed

 

Enable & SYSCLK and BGRT not driven

J8

Open

»

Factory configured - do not alter

P8

Unidentified

DUAL PORTED RAM-BASE ADDRESS SELECTION

Address

J9

A21

Pins 11 & 12 closed

A22

Pins 10 & 13 closed

A23

Pins 9 & 14 closed

A24

Pins 8 & 15 closed

A25

Pins 7 & 16 closed

A26

Pins 6 & 17 closed

A27

Pins 5 & 18 closed

A28

Pins 4 & 19 closed

A29

Pins 3 & 20 closed

A30

Pins 2 & 21 closed

A31

Pins 1 & 22 closed

STANDBY BATTERY POWER SELECTION

Setting

J3

From P1-29b (+Vbatt bus line)

Pin 1

To MAX696 power supply supervisor chip

Pin 2

From local battery

Pin 3

Note: Location of LEDs is unidentified.

DIAGNOSTIC LED(S)

LED

Color

Status

Condition

LED1

Red

On

Processor is in supervisor mode

LED2

Orange

On

Processor attempting to access and external module & it has not yet the owner of the G-6432 bus module

LED3

Yellow

On

GESSBS-40 is retrying an aborted cycle

LED4

Green

On

Processor is halted or during a reset operation