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. |