UNIDENTIFIED
SIH 486B
|
Processor |
80486SX/80486DX/P23N/P23T |
|
Processor Speed |
16/20/25/33/40/50MHz |
|
Chip Set |
ASIC |
|
Video Chip Set |
None |
|
Maximum Onboard Memory |
32MB |
|
Maximum Video Memory |
None |
|
Cache |
32/64/128/256KB |
|
BIOS |
AMI |
|
Dimensions |
218mm x 218mm |
|
I/O Options |
None |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
External battery |
J1 |
Turbo LED |
J5 |
|
Power LED & keylock |
J3 |
Turbo switch |
J7 |
|
Speaker |
J4 |
Reset switch |
J8 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Label |
Position | |
|
Monitor type select color |
J2 |
Open | |
|
Monitor type select monochrome |
J2 |
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) 1M x 9 |
(4) 4M x 9 |
|
32MB |
(4) 4M x 9 |
(4) 4M x 9 |
|
CACHE CONFIGURATION | ||||
|
Size |
Bank 0 |
Bank 1 |
TAG 0 |
TAG 1 |
|
32KB |
(4) 8K x 8 |
None |
(1) 16K x 4 |
(1) 8K x 8 |
|
64KB |
(4) 8K x 8 |
(4) 8K x 8 |
(1) 16K x 4 |
(1) 8K x 8 |
|
128KB |
(4) 32K x 8 |
None |
(1) 16K x 4 |
(1) 32K x 8 |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
(1) 16K x 4 |
(1) 32K x 8 |
|
CACHE JUMPER CONFIGURATION | |||||
|
Size |
J11 |
J12 |
J13 |
J14 |
J15 |
|
32KB |
1 & 2 |
Open |
1 & 2 |
1 & 2 |
1 & 2 |
|
64KB |
2 & 3 |
Open |
1 & 2 |
2 & 3 |
1 & 2 |
|
128KB |
1 & 2 |
1 & 2 |
2 & 3 |
2 & 3 |
2 & 3 |
|
256KB |
2 & 3 |
2 & 3 |
2 & 3 |
2 & 3 |
2 & 3 |
|
Note: Pins designated should be in the closed position. | |||||
|
CACHE JUMPER CONFIGURATION (CONT) | ||||
|
Size |
J16 |
J17 |
J18 |
J19 |
|
32KB |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
|
64KB |
Pins 1 & 2 closed |
Pins 2 & 3 closed |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
|
128KB |
Pins 1 & 2 closed |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
Pins 1 & 2 closed |
|
256KB |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
|
CPU SPEED SELECTION | ||
|
Speed |
OSC installed in Y1 |
J9 |
|
16MHz |
32MHz |
Pins 2 & 3 closed |
|
20MHz |
40MHz |
Pins 2 & 3 closed |
|
25MHz |
50MHz |
Pins 2 & 3 closed |
|
25MHz |
25MHz |
Pins 1 & 2 closed |
|
33MHz |
33MHz |
Pins 1 & 2 closed |
|
50MHz |
50MHz |
Pins 1 & 2 closed |
|
CPU TYPE SELECTION | |||
|
Type |
J20 |
J21 |
J22 |
|
80486SX |
Open |
Pins 2 & 3 closed |
Open |
|
80486DX |
Closed |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
|
P23N |
Closed |
Pins 1 & 2 closed |
Pins 2 & 3 closed |
|
P23T |
Closed |
Pins 1 & 2 closed |
Pins 1 & 2 closed |