GIGA-BYTE TECHNOLOGY CO., LTD.
GA-486VM
|
Processor |
80486SX/80487SX/80486DX/80486DX2 |
|
Processor Speed |
20/25/33/50(internal)/50/66(internal)MHz |
|
Chip Set |
UMC |
|
Max. Onboard DRAM |
32MB |
|
SRAM Cache |
64/128/256KB |
|
BIOS |
AMI |
|
Dimensions |
254mm x 218mm |
|
I/O Options |
VESA local bus slots (3) |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
External battery |
J2 |
Speaker |
J8 |
|
Turbo LED |
J5 |
Power LED & keylock |
J9 |
|
Reset switch |
J6 |
32-bit VESA card (3) |
S1 - S3 |
|
Turbo switch |
J7 | ||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
CMOS memory normal operation |
J3 |
pins 1 & 2 closed | |
|
CMOS memory clear |
J3 |
pins 2 & 3 closed | |
|
Monitor type select color |
J11 |
closed | |
|
Monitor type select monochrome |
J11 |
open | |
|
VESA bus wait states select 0 |
JP5 |
open | |
|
VESA bus wait state select 1 |
JP5 |
open | |
|
CPU JUMPER CONFIGURATION | |||||
|
CPU Type |
OSC |
JP2 |
JP6 |
W5 |
W6 |
|
80486SX-20 |
20MHz |
pins 1 & 2 closed |
open |
open |
pins 2 & 3 closed |
|
80486SX-20 |
40MHz |
pins 1 & 2 closed |
open |
closed |
pins 2 & 3 closed |
|
80486SX-25 |
25MHz |
pins 1 & 2 closed |
open |
open |
pins 2 & 3 closed |
|
80487SX-25 |
25MHz |
pins 1 & 2 closed |
open |
open |
pins 1 & 2 closed |
|
80486DX-25 |
25MHz |
pins 1 & 2 closed |
open |
open |
pins 1 & 2 closed |
|
80486DX-33 |
33.3MHz |
pins 1 & 2 closed |
open |
open |
pins 1 & 2 closed |
|
80486DX-40 |
40MHz |
pins 1 & 2 closed |
open |
open |
pins 1 & 2 closed |
|
80486DX-50 |
50MHz |
pins 2 & 3 closed |
closed |
open |
pins 1 & 2 closed |
|
80486DX2-50 |
25MHz |
pins 1 & 2 closed |
open |
open |
pins 1 & 2 closed |
|
80486DX2-66 |
33.3MHz |
pins 1 & 2 closed |
open |
open |
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 |
|
5MB |
(4) 1M x 9 |
(4) 256K x 9 |
|
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 |
|
SRAM JUMPER CONFIGURATION | ||||
|
Size |
W1 |
W2 |
W3 |
W4 |
|
64KB |
open |
open |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
128KB |
closed |
open |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
256KB |
closed |
closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
SRAM CONFIGURATION | |||
|
Size |
Cache SRAM |
Location |
TAG |
|
64KB |
(8) 8K x 8 |
Banks 0 & 1 |
(1) 8K x 8 |
|
128KB |
(4) 32K x 8 |
Bank 0 |
(1) 8K x 8 |
|
256KB |
(8) 32K x 8 |
Banks 0 & 1 |
(1) 32K x 8 |