PC II Motherboard Settings and Configuration

Processor

80188 (2)

Processor Speed

8MHz

Video Chipset

Unidentified

Chipset

Unidentified

Maximum Onboard Memory

1MB DRAM (512KB per processor)

BIOS

Unidentified

Dimensions

336.6 x 111.1mm

I/O Options

Video ports (1 per processor)

Video Types Supported

Monochrome

Highest Resolution Supported

Text only

CONNECTIONS

Function

Label

Function

Label

Video and keyboard for machine 1

J1

12V DC power out

P1A

Video and keyboard for machine 2

J2

Note:Standard video and keyboard connectors are provided on an external adapter box.

USER CONFIGURABLE SETTINGS

Function

Label

Position

»

Factory configured - do not alter

SWA/A

Pins 1 & 2 closed

»

Factory configured - do not alter

SWA/B

Pins 1 & 2 closed

»

Factory configured - do not alter

SWA/C

Pins 1 & 2 closed

»

Factory configured - do not alter

SWA/D

Pins 1 & 2 closed

»

Factory configured - do not alter

SWA/E

Pins 2 & 3 closed

»

Factory configured - do not alter

SWA/F

Pins 2 & 3 closed

»

Interrupt terminator enabled

SWD/5

On

Interrupt terminator disabled

SWD/5

Off

»

Factory configured - do not alter

SWD/6

Off

»

Factory configured - do not alter

SWD/7

Off

»

Factory configured - do not alter

SWD/8

Off

BASE I/O ADDRESS SELECTION

Setting

SWB/1

SWB/2

SWB/3

SWB/4

SWB/5

SWB/6

SWB/7

SWB/8

200h

On

On

On

On

On

On

On

On

202h

Off

On

On

On

On

On

On

On

204h

On

Off

On

On

On

On

On

On

206h

Off

Off

On

On

On

On

On

On

208h

On

On

Off

On

On

On

On

On

»

230h

On

On

On

Off

Off

On

On

On

3F6h

Off

Off

On

Off

Off

Off

Off

Off

3F8h

On

On

Off

Off

Off

Off

Off

Off

3FAh

Off

On

Off

Off

Off

Off

Off

Off

3FCh

On

Off

Off

Off

Off

Off

Off

Off

3FEh

Off

Off

Off

Off

Off

Off

Off

Off

Note: A total of 256 base address settings are available. The switches are a binary representation of the decimal memory addresses. SWB/8 is the Most Significant Bit and switch SWB/1 is the Least Significant Bit. The switches have the following decimal values: SWB/1=2, SWB/2=4, SWB/3=8, SWB/4=16, SWB/5=32, SWB/6=64, SWB/7=128, SWB/8=256. Turn off the switches and add the values of the switches that are off to 512 to obtain the correct memory address. (Off=1, On=0)

SHARED RAM ADDRESS

Setting

SWC/1

SWC/2

SWC/3

SWC/4

SWC/5

SWC/6

SWC/7

SWC/8

00000h

On

On

On

On

On

On

On

On

01000h

Off

On

On

On

On

On

On

On

02000h

On

Off

On

On

On

On

On

On

03000h

Off

Off

On

On

On

On

On

On

04000h

On

On

Off

On

On

On

On

On

»

C0000h

On

On

On

On

On

On

Off

Off

FB000h

Off

Off

On

Off

Off

Off

Off

Off

FC000h

On

On

Off

Off

Off

Off

Off

Off

FD000h

Off

On

Off

Off

Off

Off

Off

Off

FE000h

On

Off

Off

Off

Off

Off

Off

Off

FF000h

Off

Off

Off

Off

Off

Off

Off

Off

Note: A total of 256 base address settings are available. The switches are a binary representation of the decimal memory addresses. SWC/8 is the Most Significant Bit and switch SWC/1 is the Least Significant Bit. The switches have the following decimal values: SWC/8=524,288, SWC/7=262,144, SWC/6=131,072, SWC/5=65,536, SWC/4=32,768, SWC/3=16,384, SWC/2=8,192, SWC/1=4,096. Turn off the switches and add the values of the switches that are off to obtain the correct memory address. (Off=1, On=0)

INTERRUPT SELECTION

Setting

SWD/1

SWD/2

SWD/3

SWD/4

IRQ2

On

Off

Off

Off

»

IRQ3

Off

On

Off

Off

IRQ4

Off

Off

On

Off

IRQ5

Off

Off

Off

On

Processor

80188 (2)

Processor Speed

8MHz

I/O Options

Serial ports (1 per processor)

CONNECTIONS

Function

Label

Function

Label

Serial port for machine 1

P2

Header to main board CPU socket (on back of board)

U1

Serial port for machine 2

P3

Header to main board CPU socket (on back of board)

U2

12V DC power in from main board (on back of board)

P1B

MISCELLANEOUS TECHNICAL NOTES

Remove the CPUs from the main card, and install them into the daughterboard's sockets.