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JUSTRAM/AT16

MONOLITHIC SYSTEMS, INC. (COLORADO MSI)

JUSTRAM/AT16

Card Type

Memory

Maximum Onboard Memory

16MB DRAM

Data Bus

16-bit ISA

USER CONFIGURABLE SETTINGS

Setting

Label

Position

»

Normal address timing

E3

Pins 2 & 3 closed

 

20ns delay for non-compatible machines

E3

Pins 1 & 2 closed

»

All memory on board used for extended or expanded memory

SW3/4

Off

 

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

SW3/4

On

»

Zero wait states enabled

SW3/5

On

 

Zero wait states disabled

SW3/5

Off

DRAM

Size

Bank 0

Bank 1

Bank 2

Bank 3

512KB

(2) 256K x 9

None

None

None

1MB

(2) 256K x 9

(2) 256K x 9

None

None

1.5MB

(2) 256K x 9

(2) 256K x 9

(2) 256K x 9

None

2MB

(2) 256K x 9

(2) 256K x 9

(2) 256K x 9

(2) 256K x 9

2MB

(2) 1M x 9

None

None

None

2.5MB

(2) 256K x 9

(2) 256K x 9

(2) 256K x 9

(2) 256K x 9

3MB

(2) 256K x 9

(2) 256K x 9

(2) 256K x 9

(2) 256K x 9

3.5MB

(2) 256K x 9

(2) 256K x 9

(2) 256K x 9

(2) 256K x 9

4MB

(2) 256K x 9

(2) 256K x 9

(2) 256K x 9

(2) 256K x 9

4MB

(2) 1M x 9

(2) 1M x 9

None

None

6MB

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

None

8MB

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

10MB

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

12MB

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

14MB

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

16MB

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

DRAM (CON’T)

Size

Bank 4

Bank 5

Bank 6

Bank 7

512KB

None

None

None

None

1MB

None

None

None

None

1.5MB

None

None

None

None

2MB

None

None

None

None

2MB

None

None

None

None

2.5MB

(2) 256K x 9

None

None

None

3MB

(2) 256K x 9

(2) 256K x 9

None

None

3.5MB

(2) 256K x 9

(2) 256K x 9

(2) 256K x 9

None

4MB

(2) 256K x 9

(2) 256K x 9

(2) 256K x 9

(2) 256K x 9

4MB

None

None

None

None

6MB

None

None

None

None

8MB

None

None

None

None

10MB

(2) 1M x 9

None

None

None

12MB

(2) 1M x 9

(2) 1M x 9

None

None

14MB

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

None

16MB

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

DRAM JUMPERS

Setting

E1

256K x 9 SIPs used

Open

1M x 9 SIPs used

Closed

EXPANDED MEMORY BASE I/O ADDRESSES

Setting

SW4/1

SW4/2

SW4/3

208h

On

On

Off

248h

On

Off

Off

288h

Off

On

Off

2C8h

Off

Off

Off

Disabled

N/A

N/A

On

EXTENDED MEMORY SIZE

256KB SIP Size

1MB SIP Size

SW3/1

SW3/2

SW3/3

512KB

2MB

On

On

On

1MB

4MB

On

On

Off

1.5MB

6MB

On

Off

On

2MB

8MB

On

Off

Off

2.5MB

10MB

Off

On

On

3MB

12MB

Off

On

Off

3.5MB

14MB

Off

Off

On

4MB

16MB

Off

Off

Off

EXTENDED MEMORY STARTING ADDRESS

Setting

SW2/1

SW2/2

SW2/3

SW2/4

SW2/5

SW2/6

SW2/7

1024KB

On

On

On

Off

On

On

On

1152KB

On

On

On

Off

On

On

Off

1280KB

On

On

On

Off

On

Off

On

1408KB

On

On

On

Off

On

Off

Off

1536KB

On

On

On

Off

Off

On

On

15744KB

Off

Off

Off

Off

On

Off

Off

15872KB

Off

Off

Off

Off

Off

On

On

16000KB

Off

Off

Off

Off

Off

On

Off

16128KB

Off

Off

Off

Off

Off

Off

On

16256KB

Off

Off

Off

Off

Off

Off

Off

Disabled

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) If SW2 is set to Disabled, SW1 should also be set to Disabled.

EXTENDED MEMORY ENDING ADDRESS

Setting

SW1/1

SW1/2

SW1/3

SW1/4

SW1/5

SW1/6

SW1/7

1152KB

On

On

On

Off

On

On

On

1280KB

On

On

On

Off

On

On

Off

1408KB

On

On

On

Off

On

Off

On

1536KB

On

On

On

Off

On

Off

Off

1664KB

On

On

On

Off

Off

On

On

15872KB

Off

Off

Off

Off

On

Off

Off

16000KB

Off

Off

Off

Off

Off

On

On

16128KB

Off

Off

Off

Off

Off

On

Off

16256KB

Off

Off

Off

Off

Off

Off

On

16384KB

Off

Off

Off

Off

Off

Off

Off

Disabled

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. SW1/1 is the Most Significant Bit and switch SW1/7 is the Least Significant Bit. The switches have the following decimal values: SW1/1=8192, SW1/2=4096, SW1/3=2048, SW1/4=1024, SW1/5=512, SW1/6=256, SW1/7=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) If SW1 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, be sure that the amount of extended memory is a multiple of 4MB.