UNIDENTIFIED
486SI4 (M-81)
Processor |
80486SX/80487SX/80486DX/80486DX2 |
Processor Speed |
20/25/33/50(internal)/50/66(internal)MHz |
Chip Set |
C & T |
Max. Onboard DRAM |
32MB |
SRAM Cache |
128/256KB |
BIOS |
AMI |
Dimensions |
254mm x 218mm |
I/O Options |
32-bit local bus card slot |
NPU Options |
None |
CONNECTIONS | |||
Purpose |
Location |
Purpose |
Location |
Turbo LED |
J3 |
Reset switch |
J6 |
Turbo switch |
J4 |
Power LED & keylock |
J7 |
Speaker |
J5 |
32-bit local bus card |
S1 |
USER CONFIGURABLE SETTINGS | |||
Function |
Jumper |
Position | |
» |
Local bus data size select 32-bits |
J8 |
pins 1 & 2 closed |
Local bus data size select 16-bits |
J8 |
pins 2 & 3 closed | |
» |
Factory configured - do not alter |
JP1 |
open |
» |
Monitor type select color |
JP2 |
closed |
Monitor type select monochrome |
JP2 |
open | |
» |
Factory configured - do not alter |
JP3 |
pins 2 & 3 closed |
» |
Factory configured - do not alter |
JP4 |
pins 2 & 3 closed |
» |
Factory configured - do not alter |
JP5 |
closed |
CPU JUMPER CONFIGURATION | |||
CPU |
JP6 |
JP7 |
JP8 |
80486DX |
closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
80487SX |
closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
80486SX |
open |
open |
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 |
20MB |
(4) 4M x 9 |
(4) 1M x 9 |
32MB |
(4) 4M x 9 |
(4) 4M x 9 |
SRAM JUMPER CONFIGURATION | ||
Jumper |
128KB |
256KB |
SR1 |
pins 2 & 3 closed |
pins 2 & 3 closed |
SR2 |
pins 2 & 3 closed |
pins 2 & 3 closed |
SR3 |
pins 2 & 3 closed |
pins 2 & 3 closed |
SR4 |
pins 1 & 2 closed |
pins 2 & 3 closed |
SR5 |
pins 1 & 2 closed |
pins 2 & 3 closed |
SR6 |
pins 2 & 3 closed |
pins 2 & 3 closed |
SR7 |
pins 2 & 3 closed |
pins 2 & 3 closed |
SR8 |
pins 1 & 2 closed |
pins 2 & 3 closed |
SR9 |
pins 1 & 2 closed |
pins 2 & 3 closed |
SRAM CONFIGURATION | |||
Size |
Cache SRAM |
Location |
TAG |
128KB |
(4) 32K x 8 |
Bank 0 |
(1) 8K x 8 |
256KB |
(8) 32K x 8 |
Banks 0 & 1 |
(1) 8K x 8 |