...because we can't all be on the bleeding edge...
EFA CORPORATION
4M50HL2S
|
Processor |
80486SX/80486DX/80486DX2/Pentium Overdrive |
|
Processor Speed |
20/25/33/40/50(internal)/50/66(internal)MHz |
|
Chip Set |
UMC |
|
Max. Onboard DRAM |
32MB |
|
Cache |
64/128/256KB |
|
BIOS |
AMI |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
32-bit VESA local bus slots (2) |
|
NPU Options |
None |
|
CONNECTIONS |
|||
|
Purpose |
Location |
Purpose |
Location |
|
External battery |
J1 |
Reset switch |
J10 |
|
Turbo LED |
J7 |
32-bit VESA Local bus slot |
S1 |
|
Speaker |
J8 |
32-bit VESA Local bus slot |
S2 |
|
Power LED & keylock |
J9 |
|
|
|
USER CONFIGURABLE SETTINGS |
|||
|
Function |
Jumper |
Position |
|
|
» |
Factory configured - do not alter |
J3 |
N/A |
|
» |
Speed set Turbo |
J11 |
Open |
|
|
Speed normal |
J11 |
Closed |
|
» |
CPU type package PGA |
J12 |
pins 2 & 3 closed |
|
|
CPU type package PQFP |
J12 |
pins 1 & 2 closed |
|
» |
Factory configured - do not alter |
J13 |
pins 2 & 3 closed |
|
» |
Western Digital HDD WDAC2340 installed |
J17 |
pins 2 & 3 closed |
|
|
Western Digital HDD WDAC2340 not installed |
J17 |
pins 1 & 2 closed |
|
» |
CMOS memory normal operation |
W1 |
pins 1 & 2 closed |
|
|
CMOS memory clear |
W1 |
pins 2 & 3 closed |
|
» |
On board battery enabled |
W2 |
Closed |
|
|
On board battery disabled |
W2 |
Open |
|
Note:The exact location of W2 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) 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 |
8K x 8 |
|
128KB |
(4) 32K x 8 |
NONE |
8K x 8 |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
32K x 8 |
|
CACHE JUMPER CONFIGURATION |
||||||||
|
Size |
W4 |
W5 |
W6 |
W7 |
W8 |
W9 |
W10 |
W11 |
|
64KB |
1 & 2 |
1 & 2 |
1 & 2 |
Open |
Open |
Open |
Open |
Open |
|
128KB |
2 & 3 |
1 & 2 |
2 & 3 |
1 & 2 |
Open |
Closed |
Open |
Closed |
|
256KB |
2 & 3 |
2 & 3 |
1 & 2 |
2 & 3 |
Closed |
Closed |
Closed |
Closed |
|
Note:Pins designated should be in the closed position. |
||||||||
|
CPU TYPE CONFIGURATION |
||||||
|
Type |
SW3/1 |
SW3/2 |
SW3/3 |
SW3/4 |
SW3/5 |
SW3/6 |
|
80486SX/20 |
Off |
Off |
Off |
On |
On |
Off |
|
80486SX/25 |
Off |
Off |
Off |
Off |
On |
Off |
|
80486SX/33 |
Off |
Off |
Off |
Off |
On |
Off |
|
80486DX |
Off |
On |
On |
Off |
Off |
Off |
|
Pentium Overdrive |
Off |
On |
On |
Off |
Off |
Off |
|
CPU TYPE CONFIGURATION |
||||||
|
Type |
J6 |
J13 |
J14 |
J15 |
JP1 |
JP3 |
|
80486SX |
pins 2 & 3 |
pins 2 & 3 |
pins 1 & 2 |
pins 2 & 3 |
pins 1 & 2 |
pins 2 & 3 |
|
80486DX |
pins 2 & 3 |
pins 2 & 3 |
pins 1 & 2 |
pins 2 & 3 |
pins 1 & 2 |
pins 2 & 3 |
|
80486DX2 |
pins 2 & 3 |
pins 2 & 3 |
pins 1 & 2 |
pins 2 & 3 |
pins 1 & 2 |
pins 2 & 3 |
|
ODP486SX |
pins 2 & 3 |
pins 2 & 3 |
pins 1 & 2 |
pins 2 & 3 |
pins 1 & 2 |
pins 2 & 3 |
|
Note:Pins designated should be in the closed position. |
||||||
|
CPU SPEED CONFIGURATION |
||||
|
Speed |
SW1/1 |
SW1/2 |
SW1/3 |
SW1/4 |
|
20MHz |
Off |
Off |
On |
Off |
|
25MHz |
On |
On |
Off |
On |
|
33MHz |
On |
Off |
On |
On |
|
40MHz |
Off |
Off |
On |
Off |
|
50i MHz |
On |
On |
Off |
On |
|
50MHz |
Off |
Off |
Off |
Off |
|
66i MHz |
On |
Off |
On |
On |
|
VESA WAIT STATE/BUS SPEED CONFIGURATION |
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|
CPU speed |
Wait states |
J4 |
J5 |
J16 |
|
£ 33MHz |
0 wait states |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
> 33MHz |
1 wait state |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |