UNIDENTIFIED
VESA 486 Version 1.1
|
Processor |
80486SX/80487SX/80486DX/ODP486SX/80486DX2 |
|
Processor Speed |
25/33/50(internal)/50MHz |
|
Chip Set |
UMC |
|
Max. Onboard DRAM |
32MB |
|
Cache |
64/128/256KB |
|
BIOS |
AMI |
|
Dimensions |
220mm x 220mm |
|
I/O Options |
None |
|
NPU Options |
None |
|
CONNECTIONS |
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|
Purpose |
Location |
Purpose |
Location |
|
External battery |
J1 |
Speaker |
J7 |
|
Turbo LED |
J4 |
Power LED & keylock |
J8 |
|
Turbo switch |
J5 |
32-bit VESA Local bus slot |
S1 |
|
Reset switch |
J6 |
32-bit VESA Local bus slot |
S2 |
|
USER CONFIGURABLE SETTINGS |
|||
|
Function |
Jumper |
Position |
|
|
|
Monitor type select color |
JP1 |
pins 2 & 3 closed |
|
|
Monitor type select monochrome |
JP1 |
pins 1 & 2 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 |
|
5MB |
(4) 256K x 9 |
(4) 1M 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 |
|
64KB |
(4) 8K x 8 |
(4) 8K x 8 |
(1) 8K x 8 |
|
128KB |
(4) 32K x 8 |
NONE |
(1) 8K x 8 |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
(2) 32K x 8 |
|
CACHE JUMPER CONFIGURATION |
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|
Size |
JP8 |
JP9 |
JP10 |
JP11 |
|
64KB |
Open |
Open |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
128KB |
Open |
Closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
256KB |
Closed |
Closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
CPU TYPE CONFIGURATION |
||
|
Type |
JP14 |
JP15 |
|
80486SX |
pins 2 & 3 closed |
Open |
|
80487SX |
pins 1 & 2 and 3 & 4 closed |
pins 2 & 3 closed |
|
80486DX |
pins 1 & 2 and 3 & 4 closed |
pins 1 & 2 closed |
|
ODP486SX |
pins 1 & 2 and 3 & 4 closed |
pins 2 & 3 closed |
|
80486DX2 |
pins 1 & 2 and 3 & 4 closed |
pins 1 & 2 closed |
|
CPU SPEED CONFIGURATION |
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|
Speed |
JP4 |
JP5 |
JP6 |
JP7 |
|
25MHz |
Closed |
Closed |
Open |
Open |
|
33MHz |
Closed |
Open |
Open |
Open |
|
50i MHz |
Closed |
Closed |
Open |
Open |
|
50MHz |
Open |
Open |
Open |
Open |
|
VESA WAIT STATE/BUS SPEED CONFIGURATION |
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|
CPU speed |
Wait states |
JP12 |
JP13 |
|
£ 33MHz |
0 wait states |
Open |
Open |
|
> 33MHz |
1 wait state |
Closed |
Closed |