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 |