4M50HL2S Motherboard Settings and Configuration
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 | ||||
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 |
My Books
