ABIT COMPUTER CORPORATION
FA4 MAIN BOARD
|
Processor |
80386DX/CX486DLC |
|
Processor Speed |
33/40MHz |
|
Chip Set |
ALI |
|
Max. Onboard DRAM |
32MB |
|
SRAM Cache |
32/64/128/256KB |
|
BIOS |
AMI |
|
Dimensions |
240mm x 220mm |
|
I/O Options |
None |
|
NPU Options |
CX83D87 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
External battery |
J4 |
Turbo switch |
J7 pins 1 & 2 |
|
Reset switch |
J5 |
Turbo LED |
J7 pins 4 & 5 |
|
Speaker |
J6 |
Power LED & keylock |
J8 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
Monitor type select color |
JP1 |
pins 2 & 3 closed | |
|
Monitor type select monochrome |
JP1 |
pins 1 & 2 closed | |
|
Factory configured - do not alter |
JP2 |
pins 2 & 3 closed | |
|
Factory configured - do not alter |
JP7 |
pins 1 & 2 closed | |
|
Factory configured - do not alter |
JP8 |
pins 2 & 3 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 |
|
8MB |
(4) 1M x 9 |
(4) 1M x 9 |
|
16MB |
(4) 4M x 9 |
NONE |
|
32MB |
(4) 4M x 9 |
(4) 4M x 9 |
|
SRAM JUMPER CONFIGURATION | ||
|
Size |
Jumper JP5 |
Jumper JP6 |
|
32KB |
open |
pins 2 & 3 closed |
|
64KB |
open |
pins 1 & 2 closed |
|
128KB |
pins 1 & 2, 3 & 4 and 5 & 6 closed |
pins 2 & 3 closed |
|
256KB |
pins 1 & 2, 3 & 4 and 5 & 6 closed |
pins 1 & 2 closed |
|
SRAM CONFIGURATION | |||
|
Size |
Cache SRAM |
Location |
TAG |
|
32KB |
(4) 8K x 8 |
Bank 0 |
(1) 8K x 8 |
|
64KB |
(8) 8K x 8 |
Banks 0 & 1 |
(1) 8K x 8 |
|
128KB |
(4) 32K x 8 |
Bank 0 |
(1) 32K x 8 |
|
256KB |
(8) 32K x 8 |
Banks 0 & 1 |
(1) 32K x 8 |