V-12 Motherboard Settings and Configuration
ACER, INC.
V-12
Processor | 80486SX/80486DX/80486DX2 |
Processor Speed | 25/33/40/50(internal)/50/66(internal)MHz |
Chip Set | Unidentified |
Video Chip Set | None |
Maximum Onboard Memory | 128MB |
Maximum Video Memory | None |
Cache | 128/256KB |
BIOS | Unidentified |
Dimensions | 254mm x 218mm |
I/O Options | 32-bit VESA local bus slots (3), green PC connector |
NPU Options | None |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
External battery | JP6 | Green PC connector | JP12 pins 15 - 17 |
Power LED & keylock | JP12 pins 1 - 5 | Reset switch | JP12 pins 19 & 20 |
Speaker | JP12 pins 7 - 10 | Chassis fan power | JP30 |
Green PC LED | JP12 pins 12 & 13 | 32-bit VESA local bus slots | SL1 - SL3 |
USER CONFIGURABLE SETTINGS | |||
Function | Label | Position | |
» | Factory configured - do not alter | JP4 | Unidentified |
» | CMOS memory normal operation | JP5 | Open |
CMOS memory clear | JP5 | Pins 2 & 3 closed | |
» | Factory configured - do not alter | JP7 | Unidentified |
» | Factory configured - do not alter | JP8 | Unidentified |
» | Factory configured - do not alter | JP10 | Unidentified |
» | Factory configured - do not alter | JP36 | Unidentified |
DRAM CONFIGURATION | ||
Size | Bank 0 | Bank 1 |
1MB | (4) 256K x 9 | None |
1MB | None | (4) 256K x 9 |
2MB | (4) 256K x 9 | (4) 256K x 9 |
4MB | (4) 1M x 9 | None |
4MB | None | (4) 1M x 9 |
5MB | (4) 256K x 9 | (4) 1M x 9 |
5MB | (4) 1M x 9 | (4) 256K x 9 |
8MB | (4) 1M x 9 | (4) 1M x 9 |
16MB | (4) 4M x 9 | None |
16MB | None | (4) 4M x 9 |
17MB | (4) 256K x 9 | (4) 4M x 9 |
17MB | (4) 4M x 9 | (4) 256K x 9 |
20MB | (4) 1M x 9 | (4) 4M x 9 |
20MB | (4) 4M x 9 | (4) 1M x 9 |
32MB | (4) 4M x 9 | (4) 4M x 9 |
64MB | (4) 16M x 9 | None |
65MB | (4) 16M x 9 | (4) 256K x 9 |
68MB | (4) 16M x 9 | (4) 1M x 9 |
80MB | (4) 16M x 9 | (4) 4M x 9 |
128MB | (4) 16M x 9 | (4) 16M x 9 |
Note: The location of banks 0 & 1 are unidentified. | ||
CACHE CONFIGURATION | ||
Size | Bank 0 | Bank 1 |
128KB | (4) 32K x 8 | None |
256KB | (4) 32K x 8 | (4) 32K x 8 |
Note: The location of banks 0 & 1 are unidentified. | ||
CACHE JUMPER CONFIGURATION | |||
Size | JP1 | JP2 | JP3 |
128KB | Pins 2 & 3 closed | Pins 2 & 3 closed | Pins 1 & 2 closed |
256KB | Pins 1 & 2 closed | Pins 1 & 2 closed | Pins 2 & 3 closed |
CPU SPEED SELECTION | |
Speed | JP11 |
25MHz | Pins 1 & 2, 3 & 4, 5 & 6 closed |
33MHz | Pins 1 & 2, 3 & 4 closed |
40MHz | Pins 1 & 2, 5 & 6 closed |
50iMHz | Pins 1 & 2, 3 & 4, 5 & 6 closed |
50MHz | Pins 1 & 2 closed |
66iMHz | Pins 1 & 2, 3 & 4 closed |
VL BUS SPEED SELECTION | |
Speed | JP14 |
<= 33MHz | Pins 1 & 2 closed |
>33 MHz | Pins 3 & 4 closed |
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