UNIDENTIFIED
ISA-486SV2
Processor | 80486SX/80487SX/80486DX/80486DX2/Pentium Overdrive |
Processor Speed | 20/25/33/40/50(internal)/50/66(internal)MHz |
Chip Set | Unidentified |
Max. Onboard DRAM | 32MB |
Cache | 64/128/256KB |
BIOS | AMI |
Dimensions | 254mm x 218mm |
I/O Options | None |
NPU Options | None |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
External battery | BCON1 | Reset switch | CON3 |
Turbo switch | CON1 | Speaker | CON4 |
Turbo LED | CON2 | Power LED & keylock | CON5 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
Battery type select internal | BJP1 | pins 1 & 2 closed | |
Battery type select external | BJP1 | pins 2 & 3 closed | |
Monitor type select CGA | JP2 | pins 2 & 3 closed | |
Monitor type select monochrome/EGA/VGA | JP2 | pins 1 & 2 closed | |
CPU type select AMD/Intel | JP22 | pins 2 & 3 closed | |
CPU type select Cyrix | JP22 | pins 1 & 2 closed | |
» | Factory configured - do not alter | TP13 | pins 1 & 2 closed |
» | Factory configured - do not alter | TP14 | pins 1 & 2 closed |
» | Factory configured - do not alter | TP15 | pins 1 & 2 closed |
» | Factory configured - do not alter | TP17 | pins 2 & 3 closed |
» | Factory configured - do not alter | TP25 | 1D |
» | Factory configured - do not alter | TP26 | Open |
» | Factory configured - do not alter | TP27 | 1D |
Note: The location of jumpers TP17, TP25, TP26 and TP27 are unidentified. |
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) 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 | (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 | CJ1 | CJ2 | CJ3 |
64KB | pins 2 & 3 closed | pins 2 & 3 closed | Open |
128KB | pins 1 & 2 closed | Open | Closed |
256KB | pins 1 & 2 closed | pins 1 & 2 closed | Open |
CPU TYPE CONFIGURATION | |||
Type | CPJ1 | CPJ2 | CPJ3 |
80486SX (PQFP) | pins 1 & 2, 3 & 4 closed | pins 1 & 2 closed | pins 1 & 2 closed |
80486SX (PGA) | pins 2 & 3 closed | pins 2 & 3 closed | Open |
80487SX | pins 1 & 2, 3 & 4 closed | pins 1 & 2 closed | pins 1 & 2 closed |
80486DX | pins 1 & 2, 3 & 4 closed | pins 2 & 3 closed | pins 2 & 3 closed |
80486DX2 | pins 1 & 2, 3 & 4 closed | pins 2 & 3 closed | pins 2 & 3 closed |
Pentium Overdrive | pins 1 & 2, 3 & 4 closed | pins 1 & 2 closed | pins 1 & 2 closed |
Note: See also JP22 in User Configurable Settings table. |
CPU SPEED CONFIGURATION | |||
Speed | CS1 | CS2 | CS3 |
20MHz | pins 1 & 2 closed | pins 1 & 2 closed | pins 1 & 2 closed |
25MHz | pins 1 & 2 closed | pins 1 & 2 closed | pins 2 & 3 closed |
33MHz | pins 2 & 3 closed | pins 2 & 3 closed | pins 2 & 3 closed |
40MHz | pins 1 & 2 closed | pins 2 & 3 closed | pins 2 & 3 closed |
50iMHz | pins 1 & 2 closed | pins 1 & 2 closed | pins 2 & 3 closed |
50MHz | pins 2 & 3 closed | pins 1 & 2 closed | pins 1 & 2 closed |
66iMHz | pins 2 & 3 closed | pins 2 & 3 closed | pins 2 & 3 closed |