TYAN COMPUTER CORPORATION
486 BABY EISA (REV. 2.0)
|
Processor |
80486SX/80487SX/80486DX |
|
Processor Speed |
20/25/33/40/50MHz |
|
Chip Set |
OPTI |
|
Max. Onboard DRAM |
128MB |
|
Cache |
64/128/256/512KB |
|
BIOS |
AMI/Phoenix |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
None |
|
NPU Options |
4167 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Speaker |
J4 |
Turbo LED |
J7 |
|
Power LED & keylock |
J5 |
Reset switch |
S9 |
|
Turbo switch |
J6 | ||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
Snooping/flush select 20MHz |
JP8 |
Closed | |
|
Snooping/flush select 25/33/40/50MHz |
JP8 |
Open | |
|
Monitor type select color |
JP9 |
Closed | |
|
Monitor type select monochrome |
JP9 |
Open | |
|
CPU speed select iOSC/1 |
JP12 |
pins 1 & 2 closed | |
|
CPU speed select iOCS/2 |
JP12 |
pins 2 & 3 closed | |
|
DRAM CONFIGURATION | ||
|
Size |
Bank 0 |
Bank 1 |
|
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 |
|
64MB |
(4) 16M x 9 |
NONE |
|
128MB |
(4) 16M x 9 |
(4) 16M x 9 |
|
CACHE CONFIGURATION | ||
|
Size |
Bank 0 |
Bank 1 |
|
64KB |
(4) 8K x 8 |
(4) 8K x 8 |
|
128KB |
(4) 32K x 8 |
NONE |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
|
512KB |
(4) 128K x 8 |
NONE |
|
CACHE TAG CONFIGURATION | ||||
|
Size |
TAG (U54) |
TAG (U55) |
TAG (U56) |
TAG (U72) |
|
64KB |
(1) 64K x 1 |
(1) 8K x 8 |
NONE |
(1) 64K x 1 |
|
128KB |
(1) 64K x 1 |
(1) 8K x 8 |
NONE |
(1) 64K x 1 |
|
256KB |
(1) 64K x 1 |
(1) 8K x 8 |
(1) 8K x 8 |
(1) 64K x 1 |
|
512KB |
(1) 64K x 1 |
(1) 32K x 8 |
NONE |
(1) 64K x 1 |
|
CACHE JUMPER CONFIGURATION | |||||||
|
Size |
JP2 |
JP3 |
JP4 |
JP5 |
JP16 |
JP17 |
JP18 |
|
64KB |
2 & 3 |
Open |
Open |
Open |
Open |
Open |
Open |
|
128KB |
1 & 2 |
Closed |
Closed |
Open |
Closed |
Open |
Open |
|
256KB |
2 & 3 |
Closed |
Closed |
Open |
Closed |
Open |
Closed |
|
512KB |
1 & 2 |
Closed |
Closed |
Closed |
Closed |
Closed |
Closed |
|
Note: Pins designated should be in the closed position. | |||||||
|
CPU TYPE CONFIGURATION | |||
|
Type |
JP1 |
JP10 |
JP11 |
|
80486SX |
pins 2 & 3 closed |
pins 2 & 3 closed |
Open |
|
80487SX |
pins 2 & 3 closed |
pins 1 & 2, 3 & 4 closed |
pins 1 & 2 closed |
|
80486DX |
pins 1 & 2 closed |
pins 1 & 2, 3 & 4 closed |
pins 2 & 3 closed |
|
CPU SPEED CONFIGURATION | ||
|
Speed |
JP6 |
JP7 |
|
20MHz |
Open |
Open |
|
25MHz |
Open |
Open |
|
33MHz |
Open |
Closed |
|
40MHz |
Closed |
Open |
|
50MHz |
Closed |
Closed |