UNIDENTIFIED
US3486-33/50C(USAi)
Processor | 80386SX/80386DX/CX486DLC/80486SX/80486DX/80486DX2 |
Processor Speed | 20/25/33/40(internal)/50(internal)/50/66(internal)MHz |
Chip Set | USAi |
Max. Onboard DRAM | 32MB |
Cache | 64/128/256KB |
BIOS | AMI |
Dimensions | 230mm x 218mm |
I/O Options | 32-bit VESA local bus slots (2) |
NPU Options | 80387 |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Power LED & keylock | J2 | External battery | J7 |
Turbo switch | J4 | Speaker | J100 |
Turbo LED | J5 | 32-bit VESA Local bus slots | SL1 & SL2 |
Reset switch | J6 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
» | Monitor type select monochrome | J3 | Open |
Monitor type select color | J3 | Closed | |
» | CMOS memory normal operation (Internal Battery) | JMP3 | pins 2 & 3 closed |
CMOS memory normal operation (External Battery) | JMP3 | pins 1 & 2 closed | |
CMOS memory clear | JMP3 | pins 2 & 4 closed | |
» | NPU disabled | JMP4 | pins 2 & 3 closed |
NPU enabled | JMP4 | pins 1 & 2 closed | |
» | CPU type select 80386DX not installed | JMP5 | Open |
CPU type select 80386DX installed | JMP5 | Closed | |
» | CPU type select 80486DX-50 not installed | JMP7 | Open |
CPU type select 80486DX-50 installed | JMP7 | 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 |
8MB | (4) 1M x 9 | (4) 1M x 9 |
16MB | (4) 4M x 9 | NONE |
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 | (1) 32K x 8 |
CACHE JUMPER CONFIGURATION | ||
Size | JMP1 | JMP8 |
64KB | pins 1 & 2, 4 & 5, 7 & 8 closed | pins 1 & 2, 4 & 5 closed |
128KB | pins 2 & 3, 5 & 6, 8 & 9 closed | pins 2 & 3, 5 & 6 closed |
256KB | pins 2 & 3, 5 & 6, 8 & 9 closed | pins 2 & 3, 5 & 6 closed |
CPU TYPE CONFIGURATION | ||
Type | JMP10 | JMP12 |
80386 | pins 2 & 5, 3 & 6 closed | Open |
80486 | Open | Closed |
CPU TYPE CONFIGURATION | |
Type | JMP2 |
80486SX | pins 1 & 2 closed |
80486DX | pins 2 & 3 closed |
CPU SPEED CONFIGURATION | |
Speed | JMP9 |
20MHz | pins 2 & 6, 3 & 7 closed |
25MHz | pins 2 & 6, 4 & 8 closed |
33MHz | pins 3 & 7, 4 & 8 closed |
40MHz | pins 2 & 6 closed |
50MHz | pins 3 & 7 closed |
66iMHz | pins 1 & 5, 3 & 7, 4 & 8 closed |
VESA BUS SPEED CONFIGURATION | |
Speed | JMP6 |
80486DX-33/DX2-66 | pins 1 & 4, 3 & 6 closed |
80486DX-50 | pins 1 & 4 closed |