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MEMORY CARD (2/4MB)

MICRON COMPUTER, INC.

MEMORY CARD (2/4MB)

Card Type

Memory card

Chip Set

Unidentified

Maximum Onboard Memory

4MB RAM

Data Bus

16-bit ISA

Card Size

Full-length, full-height card

USER CONFIGURABLE SETTINGS

Function

Label

Position

Spare disabled

SW1/1

Off

 

Spare enabled

SW1/1

On

Parity enabled

SW1/2

On

 

Parity disabled

SW1/2

Off

 

DMA to extended memory enabled

SW1/7

On

 

DMA to extended memory disabled

SW1/7

Off

SHARED RAM ADDRESS CONFIGURATION

Size

SW1/3

SW1/4

No backfill, no 384K offset

Off

Off

384K offset in extended memory

Off

On

Backfill 128K to conventional memory

On

Off

Backfill 384K to conventional memory

On

On

Note: If more than 1 memory board is installed and backfilling is required, only the board using the highest memory address should be set for backfill.

RAM CONFIGURATION

Size

Mainboard

Piggy-back board

2MB

2MB

No board

4MB

2MB

2MB

RAM JUMPER CONFIGURATION

Starting address

Ending address (2MB)

Ending address (4MB)

SW1/8

SW2/1

SW2/2

SW2/3

SW2/4

Board is off

 

 

Off

Off

Off

Off

Off

Board is off

 

 

Off

Off

Off

Off

On

1024K

3072K

5120K

Off

Off

Off

On

Off

1536K

3584K

5632K

Off

Off

Off

On

On

2048K

4096K

6144K

Off

Off

On

Off

Off

2560K

4608k

6656k

Off

Off

On

Off

On

3072K

5120K

7168K

Off

Off

On

On

Off

3584K

5632K

7680K

Off

Off

On

On

On

4096K

6144K

8192K

Off

On

Off

Off

Off

4608K

6656K

8704K

Off

On

Off

Off

On

5120K

7168K

9216K

Off

On

Off

On

Off

5632K

7680K

9728K

Off

On

Off

On

On

6144K

8192K

10240K

Off

On

On

Off

Off

6656K

8704K

10752K

Off

On

On

Off

On

7168K

9216K

11264K

Off

On

On

On

Off

7680K

9728K

11776K

Off

On

On

On

On

8192K

10240K

12288K

On

Off

Off

Off

Off

8704K

10752K

12800K

On

Off

Off

Off

On

9216K

11264K

13312K

On

Off

Off

On

Off

9728K

11776K

13824K

On

Off

Off

On

On

10240K

12288K

14336K

On

Off

On

Off

Off

10752K

12800K

14848K

On

Off

On

Off

On

11264K

13312K

15360K

On

Off

Off

On

Off

11776K

13824K

15872K

On

Off

On

On

On

12288K

14356K

16384K

On

On

Off

Off

Off

12800K

14848K

16384K

On

On

Off

Off

On

13312K

15360K

16384K

On

On

Off

On

Off

13824K

15872K

16384K

On

On

Off

On

On

14336K

16384K

16384K

On

On

On

Off

Off

Board is off

 

 

On

On

On

Off

On

Board is off

 

 

On

On

On

On

Off

Board is off

 

 

On

On

On

On

On

Note: The values in this table are only valid if no option board memory is used for backfill and no 384K offset is used. To set starting memory address if backfill or 384K offset is used, set SW2 to the correct value. SW2/1 is the most significant bit and SW2/4 is the least significant bit. The switches have the following values: SW2/1=512KB, SW2/2=1024KB, SW2/3=2048KB, and SW2/4=4096KB. Turn the switches on and add the values to set the starting memory address. (On=1, Off=0)

WAIT STATE SELECTION

Setting

SW1/5

SW1/6

0

Off

On

1

On

Off