UNIDENTIFIED
450L2 CACHE
|
Processor |
80486SX/80487SX/80486DX/ODP486SX/80486DX2 |
|
Processor Speed |
20/25/33/50 (Internal)/50/66 (Internal)MHz |
|
Chip Set |
OPTI |
|
Max. onboard DRAM |
32MB |
|
Cache |
64/128/256KB |
|
BIOS |
AMI |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
32-bit local bus slots (2) |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
External battery |
J1 |
Turbo LED |
JP10 |
|
Speaker |
J17 |
32-bit local bus slot |
S1 |
|
Power LED & keylock |
J18 |
S2 | |
|
Turbo switch |
JP9 |
Reset |
SW1 |
|
Note:The exact locations of local bus slots S1 and S2 are unknown. | |||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
| » |
CMOS memory normal operation |
JP1 |
pins 2 & 3 closed |
|
CMOS memory clear |
JP1 |
pins 1 & 2 closed | |
| » |
Monitor type select color |
JP2 |
Closed |
|
Monitor type select monochrome |
JP2 |
Open | |
| » |
Ready signal select ISA |
JP3 & JP4 |
pins 1 & 2 closed |
|
Ready signal select Local bus |
JP3 & JP4 |
pins 2 & 3 closed | |
| » |
CPU upgrade (486PQFP to 486PGA) enabled |
JP17 |
Closed |
|
CPU upgrade (486PQFP to 486PGA) disabled |
JP17 |
Open | |
|
Note:The location of jumpers JP3 and JP4 is unknown. | |||
|
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 |
|
5MB |
(4) 1M x 9 |
(4) 256K x 9 |
|
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 (U39) |
TAG (U40) |
|
64KB |
(4) 8K x 8 |
(4) 8K x 8 |
(1) 8K x 8 |
NONE |
|
128KB |
(4) 32K x 8 |
NONE |
(1) 8K x 8 |
NONE |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
(1) 8K x 8 |
(1) 8K x 8 |
|
CACHE JUMPER CONFIGURATION | ||||||
|
Size |
JP5 |
JP6 |
JP7 |
JP8 |
JP15 |
JP16 |
|
64KB |
Open |
Open |
Open |
pins 2 & 3 |
Open |
Open |
|
128KB |
Closed |
Open |
Closed |
pins 1 & 2 |
Open |
Closed |
|
256KB |
Closed |
Closed |
Closed |
pins 2 & 3 |
Closed |
Closed |
|
CPU SPEED CONFIGURATION | ||||
|
Speed |
JP11 |
JP12 |
JP13 |
JP14 |
|
20MHz |
Closed |
Closed |
Open |
Open |
|
25MHz |
Open |
Closed |
Open |
Closed |
|
33MHz |
Open |
Open |
Closed |
Closed |
|
50i MHz |
Open |
Closed |
Open |
Closed |
|
50MHz |
Open |
Open |
Closed |
Open |
|
66MHz |
Open |
Open |
Closed |
Closed |
|
CPU TYPE CONFIGURATION | |||
|
Type |
JP18 |
JP19 |
JP20 |
|
80486SX PQFP |
Open |
Closed |
pins 2 & 3 closed |
|
80486SX PGA |
Open |
Open |
pins 2 & 3 closed |
|
80487SX |
pins 2 & 3 closed |
Closed |
pins 1 & 2 closed |
|
80486DX |
pins 1 & 2 closed |
Closed |
pins 1 & 2 closed |
|
ODP486SX |
Open |
Open |
pins 2 & 3 closed |
|
80486DX2 |
pins 1 & 2 closed |
Closed |
pins 1 & 2 closed |