ASUS COMPUTER INTERNATIONAL
ISA 486S
|
Processor |
80486SX/80487SX/80486DX |
|
Processor Speed |
20/25/33MHz |
|
Chip Set |
Symphony Haydn |
|
Max. Onboard DRAM |
32MB |
|
Cache |
64/128/256KB |
|
BIOS |
AMI |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
32-bit external memory card |
|
NPU Options |
4167 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Power LED & keylock |
CON1 |
Turbo switch |
CON4 |
|
Speaker |
CON2 |
Reset switch |
CON5 |
|
Turbo LED |
CON3 |
32-bit external memory card |
S1 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
Power good signal detect from power supply |
JP1 |
pins 2 & 3 closed | |
|
Power good signal detect from board |
JP1 |
pins 1 & 2 closed | |
|
Monitor type select monochrome or other than CGA |
JP5 |
pins 2 & 3 closed | |
|
Monitor type select CGA |
JP5 |
pins 1 & 2 closed | |
|
DRAM CONFIGURATION | ||
|
Size |
Bank 0 |
Bank 1 |
|
1MB |
(4) 256K x 9 |
NONE |
|
2MB |
(4) 256K x 9 |
(4) 256K x 9 |
|
4MB |
(4) 1M x 9 |
NONE |
|
5MB |
(4) 1M x 9 |
(4) 256K x 9 |
|
8MB |
(4) 1M x 9 |
(4) 1M x 9 |
|
16MB |
(4) 4M x 9 |
NONE |
|
17MB |
(4) 4M x 9 |
(4) 256K x 9 |
|
20MB |
(4) 4M x 9 |
(4) 1M x 9 |
|
32MB |
(4) 4M x 9 |
(4) 4M x 9 |
|
Note:Onboard memory and external memory are independent and may be used in any combination. | ||
|
EXTERNAL MEMORY CARD CONFIGURATION | ||
|
Size |
Bank 0 |
Bank 1 |
|
1MB |
(4) 256K x 9 |
NONE |
|
2MB |
(4) 256K x 9 |
(4) 256K x 9 |
|
4MB |
(4) 1M x 9 |
NONE |
|
8MB |
(4) 1M x 9 |
(4) 1M x 9 |
|
16MB |
(4) 4M x 9 |
NONE |
|
32MB |
(4) 4M x 9 |
(4) 4M x 9 |
|
CACHE CONFIGURATION | ||||
|
Size |
Bank 0 |
Bank 1 |
TAG (U27) |
TAG (U28) |
|
64KB |
(4) 8K x 8 |
(4) 8K x 8 |
(1) 8K x 8 |
NONE |
|
128KB |
(4) 32K x 8 |
NONE |
(1) 8K x 8 |
NONE |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
(1) 8K x 8 |
(1) 8K x 8 |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
(1) 32K x 8 |
NONE |
|
CACHE JUMPER CONFIGURATION | ||
|
Size |
TP7 |
RB1 & RB2 |
|
64KB |
pins 2 & 3 closed |
Position 1 |
|
128KB |
pins 1 & 2 closed |
Position 2 |
|
256KB |
pins 2 & 3 closed |
Position 3 |
|
Note:Location of TP7 is unverified. | ||
|
CPU SWITCH CONFIGURATION | ||||||
|
Type |
SW1/1 |
SW1/2 |
SW1/3 |
SW1/4 |
SW1/5 |
SW1/6 |
|
80486SX |
Off |
Off |
Off |
Off |
On |
On |
|
80487SX |
On |
On |
On |
Off |
Off |
Off |
|
80486DX |
On |
On |
On |
Off |
Off |
Off |