80486VESA Motherboard Settings and Configuration
FREE COMPUTER TECHNOLOGY, INC.
80486VESA
Processor | 80486SX/80487SX/80486SX2/80486DX ODP486/80486DX2/Pentium Overdrive |
Processor Speed | 20/25/33/40/50(internal)/66(internal)MHz |
Chip Set | SiS |
Max. Onboard DRAM | 32MB |
Cache | 64/128/256KB |
BIOS | AMI |
Dimensions | 330mm x 218mm |
I/O Options | 32-bit VESA local bus slots (3) |
NPU Options | None |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
External battery | JP1 | Reset switch | JP17 |
Peripheral power save | JP2 & JP3 | Turbo LED | JP18 |
Speaker | JP15 | Turbo switch | JP19 |
Power LED & keylock | JP16 | 32-bit VESA Local bus slots | SL1, SL2,SL3 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
» | CMOS normal operation | JP21 | pins 2 & 3 closed |
CMOS memory clear | JP21 | pins 1 & 2 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 |
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 | JP11 | JP12 |
64KB | Open | Open |
128KB | pins 1 & 2 closed | Closed |
256KB | pins 2 & 3 closed | Closed |
CPU TYPE CONFIGURATION | ||
CPU Type | JP7 | JP8 |
80486SX | pins 2 & 3 closed | Open |
80487SX | pins 1 & 2, 3 & 4 closed | pins 2 & 3 closed |
80486SX2 | pins 1 & 2, 3 & 4 closed | pins 2 & 3 closed |
80486DX | pins 1 & 2, 3 & 4 closed | pins 1 & 2 closed |
80486DX2 | pins 1 & 2, 3 & 4 closed | pins 1 & 2 closed |
ODP486 (168-pin) | pins 1 & 2, 3 & 4 closed | pins 1 & 2 closed |
ODP486 (169-pin) | pins 1 & 2, 3 & 4 closed | pins 2 & 3 closed |
Pentium Overdrive | pins 1 & 2, 3 & 4 closed | pins 2 & 3 closed |
CPU CLOCK CONFIGURATION | |||
CPU Clock | JP4 | JP5 | JP6 |
20MHz | Closed | Closed | Open |
25MHz | Closed | Open | Closed |
33MHz | Open | Closed | Closed |
40MHz | Closed | Open | Open |
50MHz | Open | Closed | Open |
VESA WAIT STATE/BUS SPEED CONFIGURATION | |||
CPU speed | Wait states | JP13 | JP14 |
<= 33MHz | 0 wait states | Open | Open |
> 33MHz | 1 wait state | Closed | Closed |
MISCELLANEOUS TECHNICAL NOTE |
Note: JP2 & JP3 are used for an optional peripheral card timed power shut-down that is set up in CMOS. |
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