(TXT) View Source
# GIGA-BYTE TECHNOLOGY CO., LTD.
GA-486AM
Processor CX486/AM486/UMC/SL80486SX/80486SX/SL80486DX/80486DX/
SL80486DX2/80486DX2/P24D/AM486DX4/80486DX4/Pentium Overdrive
Processor 25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz
Speed
Chip Set UMC
Max. 128MB
Onboard
DRAM
Cache 128/256/512/1024KB
BIOS Award
Dimensions 280mm x 220mm
I/O 32-bit PCI slots (3), floppy drive interface, green PC connector,
Options IDE interfaces (2), parallel port, serial ports (2)
NPU None
Options
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|----------------------+----------+---------------+----------|
| IDE interface | CN1 | Speaker | J3 |
| (primary) | | | |
|----------------------+----------+---------------+----------|
| IDE interface | CN2 | Power LED & | J4 |
| (secondary) | | keylock | |
|----------------------+----------+---------------+----------|
| Floppy drive | CN3 | IDE interface | JP1 |
| interface | | LED | |
|----------------------+----------+---------------+----------|
| Parallel port | CN4 | Turbo LED | JP2 |
|----------------------+----------+---------------+----------|
| Serial port 2 | CN5 | Green PC | JP3 |
| | | connector | |
|----------------------+----------+---------------+----------|
| Serial port 1 | CN6 | Green PC LED | JP4 |
|----------------------+----------+---------------+----------|
| Reset switch | J1 | Green PC | JP25 |
| | | connector | |
|----------------------+----------+---------------+----------|
| Turbo switch | J2 | 32-bit PCI | PC1 - |
| | | slots | PC3 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|---------------------------------------+---------+----------|
| » | Factory configured - do not alter | JP14 | N/A |
|---+-----------------------------------+---------+----------|
| » | Factory configured - do not alter | JP18 | N/A |
|---+-----------------------------------+---------+----------|
| » | Factory configured - do not alter | JP19 | N/A |
|---+-----------------------------------+---------+----------|
| » | Cache type select write through | JP20 | Closed |
|---+-----------------------------------+---------+----------|
| | Cache type select write back | JP20 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 2MB | (2) 256K x 36 | NONE |
|------------------+--------------------+--------------------|
| 4MB | (2) 512K x 36 | NONE |
|------------------+--------------------+--------------------|
| 4MB | (2) 256K x 36 | (2) 256K x 36 |
|------------------+--------------------+--------------------|
| 6MB | (2) 256K x 36 | (2) 512K x 36 |
|------------------+--------------------+--------------------|
| 6MB | (2) 512K x 36 | (2) 256K x 36 |
|------------------+--------------------+--------------------|
| 8MB | (2) 512K x 36 | (2) 512K x 36 |
|------------------+--------------------+--------------------|
| 8MB | (2) 1M x 36 | NONE |
|------------------+--------------------+--------------------|
| 10MB | (2) 256K x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 10MB | (2) 1M x 36 | (2) 256K x 36 |
|------------------+--------------------+--------------------|
| 12MB | (2) 512K x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 12MB | (2) 1M x 36 | (2) 512K x 36 |
|------------------+--------------------+--------------------|
| 16MB | (2) 1M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 16MB | (2) 2M x 36 | NONE |
|------------------+--------------------+--------------------|
| 18MB | (2) 256K x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 18MB | (2) 2M x 36 | (2) 256K x 36 |
|------------------+--------------------+--------------------|
| 20MB | (2) 512K x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 20MB | (2) 2M x 36 | (2) 512K x 36 |
|------------------+--------------------+--------------------|
| 24MB | (2) 1M x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 24MB | (2) 2M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 32MB | (2) 2M x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 32MB | (2) 4M x 36 | NONE |
|------------------+--------------------+--------------------|
| 34MB | (2) 256K x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 34MB | (2) 4M x 36 | (2) 256K x 36 |
|------------------+--------------------+--------------------|
| 36MB | (2) 512K x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 36MB | (2) 4M x 36 | (2) 512K x 36 |
|------------------+--------------------+--------------------|
| 40MB | (2) 1M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 40MB | (2) 4M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 48MB | (2) 2M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 48MB | (2) 4M x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 64MB | (2) 4M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 64MB | (2) 8M x 36 | NONE |
|------------------+--------------------+--------------------|
| 66MB | (2) 256K x 36 | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 66MB | (2) 8M x 36 | (2) 256K x 36 |
|------------------+--------------------+--------------------|
| 68MB | (2) 512K x 36 | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 68MB | (2) 8M x 36 | (2) 512K x 36 |
|------------------+--------------------+--------------------|
| 72MB | (2) 1M x 36 | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 72MB | (2) 8M x 36 | (2) 1M x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 80MB | (2) 2M x 36 | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 80MB | (2) 8M x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 96MB | (2) 4M x 36 | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 96MB | (2) 8M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 128MB | (2) 8M x 36 | (2) 8M x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|------------+---------------+---------------+---------------|
| 128KB | (4) 32K x 8 | NONE | (1) 8K x 8 |
|------------+---------------+---------------+---------------|
| 256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 16K x 8 |
|------------+---------------+---------------+---------------|
| 256KB | (4) 64K x 8 | NONE | (1) 16K x 8 |
|------------+---------------+---------------+---------------|
| 512KB | (4) 64K x 8 | (4) 64K x 8 | (1) 32K x 8 |
|------------+---------------+---------------+---------------|
| 512KB | (4) 128K x 8 | NONE | (1) 32K x 8 |
|------------+---------------+---------------+---------------|
| 1MB | (4) 128K x 8 | (4) 128K x 8 | (1) 64K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP24 | JP26 |
|-------+--------------------------------+-------------------|
| 128KB | Open | pins 3 & 5 closed |
|-------+--------------------------------+-------------------|
| 256KB | pins 1 & 2 closed | pins 1 & 3 closed |
|-------+--------------------------------+-------------------|
| 256KB | pins 1 & 2 closed | pins 3 & 5 closed |
|-------+--------------------------------+-------------------|
| 512KB | pins 1 & 2, 3 & 4 closed | pins 2 & 4 closed |
|-------+--------------------------------+-------------------|
| 512KB | pins 1 & 2, 3 & 4 closed | pins 3 & 5 closed |
|-------+--------------------------------+-------------------|
| 1MB | pins 1 & 2, 3 & 4, 5 & 6 | pins 4 & 6 closed |
| | closed | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
|Type | RN1 | RN2 | RN3 | RN4 | RN5 |
|-----+----------+----------+----------+----------+----------|
|Cyrix|Installed | Not | Not |Installed | Not |
| | |installed |installed | |installed |
|-----+----------+----------+----------+----------+----------|
| AMD | Not |Installed | Not | Not |Installed |
| |installed | |installed |installed | |
|-----+----------+----------+----------+----------+----------|
| UMC | Not | Not |Installed | Not | Not |
| |installed |installed | |installed |installed |
|-----+----------+----------+----------+----------+----------|
|Intel| Not |Installed | Not | Not |Installed |
| |installed | |installed |installed | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP8 |
|----------------------------+-------------------------------|
| All CPU types | pins 1 & 2 closed |
|----------------------------+-------------------------------|
| Intel S-series | pins 2 & 3 closed |
|----------------------------+-------------------------------|
| AMD S-series | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP9 |
|-------------------------------+----------------------------|
| All CPU types | Closed |
|-------------------------------+----------------------------|
| AMD | Open |
|-------------------------------+----------------------------|
| UMC | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP11 |
|----------------------------+-------------------------------|
| 80486SX | pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 80486DX | pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP13 |
|-------------------------------+----------------------------|
| All CPU types | Closed |
|-------------------------------+----------------------------|
| 80486DX4 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP5 |
|----------------------------+-------------------------------|
| Cyrix | pins 1 & 2, 3 & 4 closed |
|----------------------------+-------------------------------|
| AMD | pins 3 & 4, 5 & 6 closed |
|----------------------------+-------------------------------|
| UMC | pins 5 & 6, 7 & 8 closed |
|----------------------------+-------------------------------|
| Intel | pins 3 & 4, 5 & 6 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP15 |
|--------------------------+---------------------------------|
| 25MHz | pins 1 & 2 closed |
|--------------------------+---------------------------------|
| 33MHz | pins 1 & 2, 3 & 4, 5 & 6 closed |
|--------------------------+---------------------------------|
| 40MHz | pins 1 & 2, 3 & 4 closed |
|--------------------------+---------------------------------|
| 50iMHz | pins 1 & 2 closed |
|--------------------------+---------------------------------|
| 50MHz | pins 5 & 6 closed |
|--------------------------+---------------------------------|
| 66iMHz | pins 1 & 2, 3 & 4, 5 & 6 closed |
|--------------------------+---------------------------------|
| 75iMHz | pins 1 & 2 closed |
|--------------------------+---------------------------------|
| 100iMHz | pins 1 & 2, 3 & 4, 5 & 6 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION (P24D & AM486DX4 ONLY) |
|------------------------------------------------------------|
| Speed | JP12 |
|----------------------------+-------------------------------|
| 2x | pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 3x | pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION (80486DX4 ONLY) |
|------------------------------------------------------------|
| Speed | JP10 |
|------------------------------+-----------------------------|
| 2x | Closed |
|------------------------------+-----------------------------|
| 3x | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE CONFIGURATION |
|------------------------------------------------------------|
| Voltage | JP22 | JP23 |
|--------------------+------------------+--------------------|
| 3.3v | Open | pins 1 & 2 closed |
|--------------------+------------------+--------------------|
| 3.3v (Cyrix only) | Open | pins 2 & 3 closed |
|--------------------+------------------+--------------------|
| 4v | Closed | pins 2 & 3 closed |
|--------------------+------------------+--------------------|
| 5v | Open | pins 1 & 2 closed |
+------------------------------------------------------------+