UNIDENTIFIED
LX400/P VESA LOCAL BUS
|
Processor |
80486SX/80487SX/80486DX/ODP486SX/80486DX2 |
|
Processor Speed |
20/25/33/40/50(internal)/50/66(internal)MHz |
|
Chip Set |
SIS |
|
Max. Onboard DRAM |
32MB |
|
SRAM Cache |
64/128/256KB |
|
BIOS |
AMI |
|
Dimensions |
254mm x 218mm |
|
I/O Options |
32-bit VESA card slot (2) |
|
NPU Options |
None |
|
CONNECTIONS |
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|
Purpose |
Location |
Purpose |
Location |
|
Turbo LED |
J3 |
Reset switch |
J6 |
|
Turbo switch |
J4 |
Power LED & keylock |
J7 |
|
Speaker |
J5 |
32-bit VESA card (2) |
S1 & S2 |
|
USER CONFIGURABLE SETTINGS |
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|
Function |
Jumper |
Position |
|
|
|
Factory configured - do not alter |
JP1 |
closed |
|
|
Monitor type select color |
JP2 |
closed |
|
|
Monitor type select monochrome |
JP2 |
open |
|
|
Factory configured - do not alter |
JP9 |
unknown |
|
|
Power good signal detect from power supply |
JP14 |
pins 1 & 2 closed |
|
|
Power good signal detect from board |
JP14 |
pins 2 & 3 closed |
|
|
Factory configured - do not alter |
JP15 |
unknown |
|
|
Factory configured - do not alter |
JP16 |
unknown |
|
|
Factory configured - do not alter |
JP24 |
unknown |
|
|
Factory configured - do not alter |
JP25 |
unknown |
|
|
VESA bus wait states select 0 |
JP26 |
open |
|
|
VESA bus wait state select 1 |
JP26 |
open |
|
|
CPU speed select 33MHz |
JP27 |
closed |
|
|
CPU speed select > 33MHz |
JP27 |
closed |
|
Note: The locations of JP1 and JP16 are unknown. |
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|
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 |
|
CPU SPEED CONFIGURATION |
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|
Speed |
JP10 |
JP11 |
JP12 |
JP13 |
|
66MHz (internal) |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
50MHz |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
50MHz (internal) |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
33MHz |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
25MHz |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
20MHz |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
CPU JUMPER CONFIGURATION |
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|
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 |
|
SRAM JUMPER CONFIGURATION |
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|
Jumper |
64KB |
128KB |
256KB |
|
SR1 |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
SR2 |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
SR3 |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
SR4 |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
SR5 |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
SR6 |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
SRAM CONFIGURATION |
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|
Size |
Cache SRAM |
Location |
TAG |
|
64KB |
(8) 8K x 8 |
Banks 0 & 1 |
(1) 8K x 8 |
|
128KB |
(4) 32K x 8 |
Bank 0 |
(1) 8K x 8 |
|
256KB |
(8) 32K x 8 |
Banks 0 & 1 |
(1) 32K x 8 |