...because we can't all be on the bleeding edge...





AT-RAMBANK

DTK COMPUTER, INC.

AT-RAMBANK

Card Type

Memory

Chipset/Controller

N/A

I/O Options

N/A

Maximum DRAM

2048KB

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

512KB

(18) 41256

None

None

None

1MB

(18) 41256

(18) 41256

None

None

1.5MB

(18) 41256

(18) 41256

(18) 41256

None

2MB

(18) 41256

(18) 41256

(18) 41256

(18) 41256

STARTING MEMORY ADDRESS SELECTION

Memory

Address

SW2/1

SW2/2

SW2/3

SW2/4

SW2/5

SW2/6

SW2/7

SW1/8

512KB

080000h

Off

Off

On

Off

Off

Off

Off

Off

1MB

100000h

Off

Off

Off

On

Off

Off

Off

On

1.25MB

120000h

On

Off

Off

On

Off

Off

Off

On

1.25MB

140000h

Off

On

Off

On

Off

Off

Off

On

1.375MB

160000h

On

On

Off

On

Off

Off

Off

On

1.5MB

180000h

Off

Off

On

On

Off

Off

Off

On

1.625MB

1A0000h

On

Off

On

On

Off

Off

Off

On

1.75MB

1C0000h

Off

On

On

On

Off

Off

Off

On

1.875MB

1E0000h

On

On

On

On

Off

Off

Off

On

2MB

200000h

Off

Off

Off

Off

On

Off

Off

On

2.125MB

220000h

On

Off

Off

Off

On

Off

Off

On

2.25MB

240000h

Off

On

Off

Off

On

Off

Off

On

2.375MB

260000h

On

On

Off

Off

On

Off

Off

On

2.5MB

280000h

Off

Off

On

Off

On

Off

Off

On

2.625MB

2A0000h

On

Off

On

Off

On

Off

Off

On

2.75MB

2C0000h

Off

On

On

Off

On

Off

Off

On

2.875MB

2E0000h

On

On

On

Off

On

Off

Off

On

3MB

300000h

Off

Off

Off

On

On

Off

Off

On

3.125MB

320000h

On

Off

Off

On

On

Off

Off

On

3.25MB

340000h

Off

On

Off

On

On

Off

Off

On

3.375MB

360000h

On

On

Off

On

On

Off

Off

On

3.5MB

380000h

Off

Off

On

On

On

Off

Off

On

3.625MB

3A0000h

On

Off

On

On

On

Off

Off

On

3.75MB

3C0000h

Off

On

On

On

On

Off

Off

On

3.875MB

3E0000h

On

On

On

On

On

Off

Off

On

4MB

400000h

Off

Off

Off

Off

Off

On

Off

On

4.125MB

420000h

On

Off

Off

Off

Off

On

Off

On

4.25MB

440000h

Off

On

On

On

On

On

Off

On

4.375MB

460000h

On

On

Off

Off

Off

On

Off

On

4.5MB

480000h

Off

Off

On

Off

Off

On

Off

On

4.625MB

4A0000h

On

Off

On

Off

Off

On

Off

On

4.75MB

4C0000h

Off

On

On

Off

Off

On

Off

On

4.875MB

4E0000h

On

On

On

Off

Off

On

Off

On

5.0MB

500000h

Off

Off

Off

On

Off

On

Off

On

5.125MB

520000h

On

Off

Off

On

Off

On

Off

On

5.25MB

540000h

Off

On

Off

On

Off

On

Off

On

5.375MB

560000h

On

On

Off

On

Off

On

Off

On

5.5MB

580000h

Off

Off

On

On

Off

On

Off

On

5.625MB

5A0000h

On

Off

On

On

Off

On

Off

On

5.75MB

5C0000h

Off

On

On

On

Off

On

Off

On

5.875MB

5E0000h

On

On

On

On

Off

On

Off

On

STARTING MEMORY ADDRESS SELECTION

Memory

Address

SW2/1

SW2/2

SW2/3

SW2/4

SW2/5

SW2/6

SW2/7

SW1/8

6MB

600000h

Off

Off

Off

Off

On

On

Off

On

6.125MB

620000h

On

Off

Off

Off

On

On

Off

On

6.25MB

640000h

Off

On

Off

Off

On

On

Off

On

6.375MB

660000h

On

On

Off

Off

On

On

Off

On

6.5MB

680000h

Off

Off

On

Off

On

On

Off

On

6.625MB

6A0000h

On

Off

On

Off

On

On

Off

On

6.75MB

6C0000h

Off

On

On

Off

On

On

Off

On

6.875MB

6E0000h

On

On

On

Off

On

On

Off

On

7MB

700000h

Off

Off

Off

On

On

On

Off

On

7.125MB

720000h

On

Off

Off

On

On

On

Off

On

7.25MB

740000h

Off

On

Off

On

On

On

Off

On

7.375MB

760000h

On

On

Off

On

On

On

Off

On

7.5MB

780000h

Off

Off

On

On

On

On

Off

On

7.625MB

7A0000h

On

Off

On

On

On

On

Off

On

7.75MB

7C0000h

Off

On

On

On

On

On

Off

On

7.87MB

7E0000h

On

On

On

On

On

On

Off

On

8MB

800000h

Off

Off

Off

Off

Off

Off

On

On

8.125MB

820000h

On

Off

Off

Off

Off

Off

On

On

8.25MB

840000h

Off

On

Off

Off

Off

Off

On

On

8.375MB

860000h

On

On

Off

Off

Off

Off

On

On

8.5MB

880000h

Off

Off

On

Off

Off

Off

On

On

8.625MB

8A0000h

On

Off

On

Off

Off

Off

On

On

8.75MB

8C0000h

Off

On

On

Off

Off

Off

On

On

8.87MB

8E0000h

On

On

On

Off

Off

Off

On

On

9MB

900000h

Off

Off

Off

On

Off

Off

On

On

9.125MB

920000h

On

Off

Off

On

Off

Off

On

On

9.25MB

940000h

Off

On

Off

On

Off

Off

On

On

9.375MB

960000h

On

On

Off

On

Off

Off

On

On

9.5MB

980000h

Off

Off

On

On

Off

Off

On

On

9.625MB

9A0000h

On

Off

On

On

Off

Off

On

On

9.75MB

9C0000h

Off

On

On

On

Off

Off

On

On

9.87MB

9E0000h

On

On

On

On

Off

Off

On

On

10MB

A00000h

Off

Off

Off

Off

On

Off

On

On

10.125MB

A20000h

On

Off

Off

Off

On

Off

On

On

10.25MB

A40000h

Off

On

Off

Off

On

Off

On

On

10.375MB

A60000h

On

On

Off

Off

On

Off

On

On

10.5MB

A80000h

Off

Off

On

Off

On

Off

On

On

10.625MB

AA0000h

On

Off

On

Off

On

Off

On

On

10.75MB

AC0000h

Off

On

On

Off

On

Off

On

On

10.87MB

AE0000h

On

On

On

Off

On

Off

On

On

STARTING MEMORY ADDRESS SELECTION

Memory

Address

SW2/1

SW2/2

SW2/3

SW2/4

SW2/5

SW2/6

SW2/7

SW1/8

11MB

B00000h

Off

Off

Off

On

On

Off

On

On

11.125MB

B20000h

On

Off

Off

On

On

Off

On

On

11.25MB

B40000h

Off

On

Off

On

On

Off

On

On

11.375MB

B60000h

On

On

Off

On

On

Off

On

On

11.5MB

B80000h

Off

Off

On

On

On

Off

On

On

11.625MB

BA0000h

On

Off

On

On

On

Off

On

On

11.75MB

BC0000h

Off

On

On

On

On

Off

On

On

11.87MB

BE0000h

On

On

On

On

On

Off

On

On

12MB

C00000h

Off

Off

Off

Off

Off

On

On

On

12.125MB

C20000h

On

Off

Off

Off

Off

On

On

On

12.25MB

C40000h

Off

On

Off

Off

Off

On

On

On

12.375MB

C60000h

On

On

Off

Off

Off

On

On

On

12.5MB

C80000h

Off

Off

On

Off

Off

On

On

On

12.625MB

CA0000h

On

Off

On

Off

Off

On

On

On

12.75MB

CC0000h

Off

On

On

Off

Off

On

On

On

12.87MB

CE0000h

On

On

On

Off

Off

On

On

On

13MB

C00000h

Off

Off

Off

On

Off

On

On

On

13.125MB

D20000h

On

Off

Off

On

Off

On

On

On

13.25MB

D40000h

Off

On

Off

On

Off

On

On

On

13.375MB

D60000h

On

On

Off

On

Off

On

On

On

13.5MB

D80000h

Off

Off

On

On

Off

On

On

On

13.625MB

DA0000h

On

Off

On

On

Off

On

On

On

13.75MB

DC0000h

Off

On

On

On

Off

On

On

On

13.87MB

DE0000h

On

On

On

On

Off

On

On

On

14MB

C00000h

Off

Off

Off

Off

On

On

On

On

14.125MB

E20000h

On

Off

Off

Off

On

On

On

On

14.25MB

E40000h

Off

On

Off

Off

On

On

On

On

14.375MB

E60000h

On

On

Off

Off

On

On

On

On

14.5MB

E80000h

Off

Off

On

Off

On

On

On

On

14.625MB

EA0000h

On

Off

On

Off

On

On

On

On

14.75MB

EC0000h

Off

On

On

Off

On

On

On

On

14.87MB

EE0000h

On

On

On

Off

On

On

On

On

15MB

F00000h

Off

Off

Off

On

On

On

On

On

15.125MB

F20000h

On

Off

Off

On

On

On

On

On

15.25MB

F40000h

Off

On

Off

On

On

On

On

On

15.375MB

F60000h

On

On

Off

On

On

On

On

On

15.5MB

F80000h

Off

Off

On

On

On

On

On

On

15.625MB

FA0000h

On

Off

On

On

On

On

On

On

15.75MB

FC0000h

Off

On

On

On

On

On

On

On

15.87MB

FE0000h

On

On

On

On

On

On

On

On

I/O PORT ADDRESS CONFIGURATION

Address

SW1/1

SW1/2

SW1/3

SW1/4

258h - 259h

Off

On

Off

Off

 

268h - 269h

Off

Off

Off

Off

 

208h - 209h

On

On

On

On

 

218h - 219h

On

Off

On

On

 

228h - 229h

On

Off

On

On

 

238h - 239h

Off

Off

On

On

 

248h - 249h

On

On

Off

On

 

278h - 279h

Off

Off

Off

On

 

288h - 289h

On

On

On

Off

 

298h - 299h

Off

On

On

Off

 

2A8h - 2A9h

On

Off

On

Off

 

2B8h - 2B9h

Off

Off

On

Off

 

2C8h - 2C9h

On

On

Off

Off

 

2D8h - 2D9h

Off

On

Off

Off

 

2E8h - 2E9h

On

Off

Off

Off

 

2F8h - 2F9h

Off

Off

Off

Off

MEMORY CARD CONFIGURATION

Expanded

Conventional/Extended memory

SW1/5

SW1/6

0KB

2MB

On

On

0KB

1.5MB

On

Off

0KB

1MB

Off

On

0KB

512KB

Off

Off

2MB

0KB

Off

Off

1.5MB

0KB

Off

Off

1MB

0KB

Off

Off

512KB

0KB

Off

Off

PARITY CONFIGURATION

Parity

SW1/8

Enabled

On

 

Disabled

Off

FACTORY CONFIGURED - DO NOT ALTER

Switch

Position

SW1/7

N/A