AST RESEARCH, INC.
PREMIUM/486-25
|
Processor |
80486DX |
|
Processor Speed |
25MHz |
|
Chip Set |
AST |
|
Max. Onboard DRAM |
None (36MB total on 32-bit external cards) |
|
Cache |
None |
|
BIOS |
AST |
|
Dimensions |
355mm x 251mm |
|
I/O Options |
Parallel port, serial ports (2), floppy drive interface, IDE interface, 32-bit external CPU/NPU card slot, 32-bit external memory card slots (2), 16-bit external expansion card slot |
|
NPU Options |
4167 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
32-bit external CPU/NPU card |
CN1 |
Auxiliary floppy drive interface |
P4 |
|
32-bit external memory card |
CN2 |
Power LED & reset switch |
P5 |
|
32-bit external memory card |
CN3 |
Speaker |
P6 |
|
16-bit external expansion card |
CN4 |
External battery |
P8 |
|
Primary floppy drive interface |
P3 |
IDE interface |
P11 |
|
Note:Expansion card slots CN1 through CN4 will accept standard 8 or 16-bit ISA cards. | |||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
| » |
Password check enabled |
E1 |
pins 1 & 2 closed |
|
Password check disabled |
E1 |
pins 2 & 3 closed | |
| » |
Factory configured - do not alter |
E2 |
Open |
| » |
Factory configured - do not alter |
E3 |
Open |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
| » |
Parity check enabled |
E1 |
Closed |
|
Parity check disabled |
E1 |
Open | |
|
DRAM CONFIGURATION | ||
|
Size |
Bank 0 |
Bank 1 |
|
2MB |
(2) 256K x 36 |
NONE |
|
4MB |
(2) 256K x 36 |
(2) 256K x 36 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
SW1 |
Position | |
| » |
Parity check enabled |
SW1/1 |
On |
|
Parity check disabled |
SW1/1 |
Off | |
| » |
Total system memory is less than 16MB |
SW1/2 |
Off |
|
Total system memory is 16MB or more |
SW1/2 |
On | |
| » |
Factory configured - do not alter |
SW1/3 |
Off |
|
DRAM SWITCH CONFIGURATION | ||||||
|
Total memory |
SW1/4 |
SW1/5 |
SW1/6 |
SW1/7 |
SW1/8 | |
|
1MB |
On |
On |
On |
On |
Off | |
|
2MB |
On |
On |
On |
Off |
On | |
|
3MB |
On |
On |
On |
Off |
Off | |
| » |
4MB |
On |
On |
Off |
On |
On |
|
5MB |
On |
On |
Off |
On |
Off | |
|
6MB |
On |
On |
Off |
Off |
On | |
|
7MB |
On |
On |
Off |
Off |
Off | |
|
8MB |
On |
Off |
On |
On |
On | |
|
9MB |
On |
Off |
On |
On |
Off | |
|
10MB |
On |
Off |
On |
Off |
On | |
|
11MB |
On |
Off |
On |
Off |
Off | |
|
12MB |
On |
Off |
Off |
On |
On | |
|
13MB |
On |
Off |
Off |
On |
Off | |
|
14MB |
On |
Off |
Off |
Off |
On | |
|
15MB |
On |
Off |
Off |
Off |
Off | |
|
16MB |
Off |
On |
On |
On |
On | |
|
17MB |
Off |
On |
On |
On |
Off | |
|
18MB |
Off |
On |
On |
Off |
On | |
|
19MB |
Off |
On |
On |
Off |
Off | |
|
20MB |
Off |
On |
Off |
On |
On | |
|
Note:Set the switches to the total amount of system memory installed not including this card.
A setting of more than 4MB means that this card is the second memory card that is installed. | ||||||
|
DRAM CONFIGURATION | ||||||||||||||||
|
Size |
0 |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
13 |
14 |
15 |
|
0MB |
None |
None |
None |
None |
None |
None |
None |
None |
None |
None |
None |
None |
None |
None |
None |
None |
|
1MB |
Filled |
None |
None |
None |
None |
None |
None |
None |
None |
None |
None |
None |
None |
None |
None |
None |
|
2MB |
Filled |
Filled |
None |
None |
None |
None |
None |
None |
None |
None |
None |
None |
None |
None |
None |
None |
|
3MB |
Filled |
Filled |
Filled |
None |
None |
None |
None |
None |
None |
None |
None |
None |
None |
None |
None |
None |
|
4MB |
Filled |
Filled |
Filled |
Filled |
None |
None |
None |
None |
None |
None |
None |
None |
None |
None |
None |
None |
|
5MB |
Filled |
Filled |
Filled |
Filled |
Filled |
None |
None |
None |
None |
None |
None |
None |
None |
None |
None |
None |
|
6MB |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
None |
None |
None |
None |
None |
None |
None |
None |
None |
None |
|
7MB |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
None |
None |
None |
None |
None |
None |
None |
None |
None |
|
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
None |
None |
None |
None |
None |
None |
None |
None |
|
9MB |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
None |
None |
None |
None |
None |
None |
None |
|
10MB |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
None |
None |
None |
None |
None |
None |
|
11MB |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
None |
None |
None |
None |
None |
|
12MB |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
None |
None |
None |
None |
|
13MB |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
None |
None |
None |
|
14MB |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
None |
None |
|
15MB |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
None |
|
16MB |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
Filled |
|
Note:Banks (0 through 15) are filled using (1) 256K x 36 SIMMs. This table is for a single card only. | ||||||||||||||||