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JUSTRAM/ATZ

MONOLITHIC SYSTEMS, INC. (COLORADO MSI)

JUSTRAM/ATZ

Card Type

Memory

Maximum Onboard Memory

8MB DRAM

Data Bus

16-bit ISA

CONNECTIONS

Function

Label

Function

Label

Daughterboard header

CN1A

Header to main board (on back)

CN2B

Header to main board (on back)

CN1B

Daughterboard header

CN3A

Daughterboard header

CN2A

Header to main board (on back)

CN3B

USER CONFIGURABLE SETTINGS

Setting

Label

Position

»

Factory configured - do not alter

E1

Unidentified

»

Normal address timing

JP5

Pins 1 & 2 closed

 

20ns delay for non-compatible machines

JP5

Pins 2 & 3 closed

»

Factory configured - do not alter

JP8

Pins 2 & 3 closed

»

Zero wait states enabled

JP13

Closed

 

Zero wait states disabled

JP13

Open

DRAM

Setting

Bank 0

P0

Bank 1

P1

2MB

(16) 1M x 1

(2) 1M x 1

None

None

4MB

(16) 1M x 1

(2) 1M x 1

(16) 1M x 1

(2) 1M x 1

6MB

(16) 1M x 1

(2) 1M x 1

(16) 1M x 1

(2) 1M x 1

8MB

(16) 1M x 1

(2) 1M x 1

(16) 1M x 1

(2) 1M x 1

DRAM (CON’T)

Setting

Bank 2

P2

Bank 3

P3

2MB

None

None

None

None

4MB

None

None

None

None

6MB

(16) 1M x 1

(2) 1M x 1

None

None

8MB

(16) 1M x 1

(2) 1M x 1

(16) 1M x 1

(2) 1M x 1

CONVENTIONAL MEMORY

Setting

SW1/7

SW1/8

»

All memory on board used for extended or expanded memory

Off

Off

 

First 128KB on board used for conventional memory above 512KB

On

On

EXPANDED MEMORY BASE I/O ADDRESSES

Main Board

Daughter Board

SW1/1

SW1/2

SW1/3

208h

218h

On

On

On

228h

238h

On

On

Off

248h

258h

On

Off

On

268h

278h

On

Off

Off

288h

298h

Off

On

On

2A8h

2B8h

Off

On

Off

2C8h

2D8h

Off

Off

On

2E8h

2F8h

Off

Off

Off

EXTENDED MEMORY SIZE

Setting

SW1/5

SW1/6

0MB

N/A

N/A

2MB

On

On

4MB

On

Off

6MB

Off

Off

8MB

Off

Off

EXTENDED MEMORY STARTING ADDRESS

Setting

SW2/1

SW2/2

SW2/3

SW2/4

SW2/5

SW2/6

SW2/7

SW2/8

1024KB

On

On

On

Off

On

On

On

On

1152KB

On

On

On

Off

On

On

Off

On

1280KB

On

On

On

Off

On

Off

On

On

1408KB

On

On

On

Off

On

Off

Off

On

1536KB

On

On

On

Off

Off

On

On

On

15744KB

Off

Off

Off

Off

On

Off

Off

On

15872KB

Off

Off

Off

Off

Off

On

On

On

16000KB

Off

Off

Off

Off

Off

On

Off

On

16128KB

Off

Off

Off

Off

Off

Off

On

On

16256KB

Off

Off

Off

Off

Off

Off

Off

On

Disabled

Off

Off

Off

Off

Off

Off

Off

Off

Note: A total of 112 memory address settings are available. The switches are a binary representation of the decimal memory addresses. SW2/1 is the Most Significant Bit and switch SW2/7 is the Least Significant Bit. The switches have the following decimal values: SW2/1=8192, SW2/2=4096, SW2/3=2048, SW2/4=1024, SW2/5=512, SW2/6=256, SW2/7=128. Turn off the switches and add the values of the switches that are off obtain the correct starting memory address. (Off=1, On=0). SW2/8 does not affect the address, but enables or disabled extended memory. If SW2 is set to Disabled, SW3 should also be set to Disabled.

EXTENDED MEMORY ENDING ADDRESS

Setting

SW3/1

SW3/2

SW3/3

SW3/4

SW3/5

SW3/6

SW3/7

SW3/8

1152KB

On

On

On

Off

On

On

On

Off

1280KB

On

On

On

Off

On

On

Off

Off

1408KB

On

On

On

Off

On

Off

On

Off

1536KB

On

On

On

Off

On

Off

Off

Off

1664KB

On

On

On

Off

Off

On

On

Off

15872KB

Off

Off

Off

Off

On

Off

Off

Off

16000KB

Off

Off

Off

Off

Off

On

On

Off

16128KB

Off

Off

Off

Off

Off

On

Off

Off

16256KB

Off

Off

Off

Off

Off

Off

On

Off

16384KB

Off

Off

Off

Off

Off

Off

Off

Off

Disabled

On

On

On

On

On

On

On

On

Note: A total of 112 memory address settings are available. The switches are a binary representation of the decimal memory addresses. SW3/1 is the Most Significant Bit and switch SW3/7 is the Least Significant Bit. The switches have the following decimal values: SW3/1=8192, SW3/2=4096, SW3/3=2048, SW3/4=1024, SW3/5=512, SW3/6=256, SW3/7=128. Turn off the switches and add the values of the switches that are off to 128KB obtain the correct starting memory address. (Off=1, On=0). SW3/8 does not affect the address, but enables or disabled extended memory. If SW3 is set to Disabled, SW2 should also be set to Disabled.

MISCELLANEOUS TECHNICAL NOTE

The board may be configured for any combination of conventional, expanded, and extended memory. When conventional memory is enabled, be sure to subtract 128KB from the remaining memory. When configured for both extended and expanded memory, the memory on the main board will act as the extended memory, and the memory on the daughter board will be the expanded memory.