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# GIGA-BYTE TECHNOLOGY CO., INC.
GA-586AT
Processor Pentium
Processor 75/90/100MHz
Speed
Chip Set UMC
Max. Onboard 128MB
DRAM
Cache 256/512KB
BIOS Award
Dimensions 280mm x 220mm
I/O Options 32-bit PCI slots (3), floppy drive interface,
green PC connector, IDE interfaces (2), parallel
port, serial ports (2)
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|----------------------+----------+---------------+----------|
| Serial port 1 | CN1 | Green PC LED | J5 |
|----------------------+----------+---------------+----------|
| Serial port 2 | CN2 | Reset switch | J6 |
|----------------------+----------+---------------+----------|
| Floppy drive | CN3 | Turbo switch | J7 |
| interface | | | |
|----------------------+----------+---------------+----------|
| Parallel port | CN4 | Turbo LED | J8 |
|----------------------+----------+---------------+----------|
| Chassis fan power | J1 | Speaker | J9 |
|----------------------+----------+---------------+----------|
| IDE interface | J2 | Power LED & | J10 |
| (primary) | | keylock | |
|----------------------+----------+---------------+----------|
| IDE interface | J3 | 32-bit PCI | PC1 - |
| (secondary) | | slots | PC3 |
|----------------------+----------+---------------+----------|
| Green PC connector | J4 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|----------------------------------------+--------+----------|
| » | CPU type select VR or standard CPU | JP2 | Open |
|---+------------------------------------+--------+----------|
| | CPU type select VRE CPU | JP2 | Closed |
|---+------------------------------------+--------+----------|
| » | Factory configured - do not alter | JP12 | N/A |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|------------+---------------+---------------+---------------|
| 2MB | (2) 256K x 36 | NONE | NONE |
|------------+---------------+---------------+---------------|
| 4MB | (2) 256K x 36 | (2) 256K x 36 | NONE |
|------------+---------------+---------------+---------------|
| 4MB | (2) 512K x 36 | NONE | NONE |
|------------+---------------+---------------+---------------|
| 6MB | (2) 256K x 36 | (2) 256K x 36 | (2) 256K x 36 |
|------------+---------------+---------------+---------------|
| 6MB | (2) 512K x 36 | (2) 256K x 36 | NONE |
|------------+---------------+---------------+---------------|
| 8MB | (2) 512K x 36 | (2) 256K x 36 | (2) 256K x 36 |
|------------+---------------+---------------+---------------|
| 8MB | (2) 1M x 36 | NONE | NONE |
|------------+---------------+---------------+---------------|
| 10MB | (2) 256K x 36 | (2) 1M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 10MB | (2) 1M x 36 | (2) 256K x 36 | NONE |
|------------+---------------+---------------+---------------|
| 12MB | (2) 512K x 36 | (2) 1M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 12MB | (2) 1M x 36 | (2) 256K x 36 | (2) 256K x 36 |
|------------+---------------+---------------+---------------|
| 16MB | (2) 1M x 36 | (2) 1M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 16MB | (2) 2M x 36 | NONE | NONE |
|------------+---------------+---------------+---------------|
| 18MB | (2) 256K x 36 | (2) 1M x 36 | (2) 1M x 36 |
|------------+---------------+---------------+---------------|
| 18MB | (2) 2M x 36 | (2) 256K x 36 | NONE |
|------------+---------------+---------------+---------------|
| 20MB | (2) 512K x 36 | (2) 1M x 36 | (2) 1M x 36 |
|------------+---------------+---------------+---------------|
| 20MB | (2) 2M x 36 | (2) 256K x 36 | (2) 256K x 36 |
|------------+---------------+---------------+---------------|
| 24MB | (2) 1M x 36 | (2) 1M x 36 | (2) 1M x 36 |
|------------+---------------+---------------+---------------|
| 24MB | (2) 2M x 36 | (2) 1M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 32MB | (2) 2M x 36 | (2) 1M x 36 | (2) 1M x 36 |
|------------+---------------+---------------+---------------|
| 32MB | (2) 4M x 36 | NONE | NONE |
|------------+---------------+---------------+---------------|
| 34MB | (2) 256K x 36 | (2) 4M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 34MB | (2) 4M x 36 | (2) 256K x 36 | NONE |
|------------+---------------+---------------+---------------|
| 36MB | (2) 512K x 36 | (2) 4M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 36MB | (2) 4M x 36 | (2) 256K x 36 | (2) 256K x 36 |
|------------+---------------+---------------+---------------|
| 40MB | (2) 1M x 36 | (2) 4M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 40MB | (2) 4M x 36 | (2) 1M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 48MB | (2) 2M x 36 | (2) 4M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 48MB | (2) 4M x 36 | (2) 1M x 36 | (2) 1M x 36 |
|------------+---------------+---------------+---------------|
| 64MB | (2) 4M x 36 | (2) 4M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 64MB | (2) 8M x 36 | NONE | NONE |
|------------+---------------+---------------+---------------|
| 66MB | (2) 256K x 36 | (2) 4M x 36 | (2) 4M x 36 |
|------------+---------------+---------------+---------------|
| 66MB | (2) 8M x 36 | (2) 256K x 36 | NONE |
|------------+---------------+---------------+---------------|
| 68MB | (2) 512K x 36 | (2) 4M x 36 | (2) 4M x 36 |
|------------+---------------+---------------+---------------|
| 68MB | (2) 8M x 36 | (2) 256K x 36 | (2) 256K x 36 |
|------------+---------------+---------------+---------------|
| 72MB | (2) 1M x 36 | (2) 4M x 36 | (2) 4M x 36 |
|------------+---------------+---------------+---------------|
| 72MB | (2) 8M x 36 | (2) 1M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 80MB | (2) 2M x 36 | (2) 4M x 36 | (2) 4M x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|------------+---------------+---------------+---------------|
| 80MB | (2) 8M x 36 | (2) 1M x 36 | (2) 1M x 36 |
|------------+---------------+---------------+---------------|
| 96MB | (2) 4M x 36 | (2) 4M x 36 | (2) 4M x 36 |
|------------+---------------+---------------+---------------|
| 96MB | (2) 8M x 36 | (2) 4M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 112MB | (2) 8M x 36 | (2) 4M x 36 | (2) 4M x 36 |
|------------+---------------+---------------+---------------|
| 128MB | (2) 8M x 36 | NONE | (2) 8M x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | TAG |
|------------+------------------+----------------------------|
| 256KB | (8) 32K x 8 | (1) 8K x 8 or (1) 32K x 8 |
|------------+------------------+----------------------------|
| 512KB | (8) 64K x 8 | (1) 16K x 8 or (1) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP3 |
|----------------------------+-------------------------------|
| 256KB | pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 512KB | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP4 | JP5 |
|------------------+--------------------+--------------------|
| 75MHz | pins 2 & 3 closed | pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 90MHz | pins 1 & 2 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 100MHz | pins 1 & 2 closed | pins 2 & 3 closed |
+------------------------------------------------------------+