TEXT View Source
# ROBOTECH, INC.
GMB-486UNL
Processor 80486SX/80487SX/80486DX/80486DX2
Processor Speed 25/33/40/50(internal)/50/66(internal)MHz
Chip Set Toshiba
Max. Onboard DRAM 32MB
Cache 64/128/256KB
BIOS AMI
Dimensions 260mm x 220mm
I/O Options 32-bit VESA local bus slots (3)
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| External battery | J4 | Turbo switch | JP17 |
|-------------------+----------+------------------+----------|
| Power LED & | J5 | Reset switch | JP18 |
| keylock | | | |
|-------------------+----------+------------------+----------|
| Speaker | J6 | 32-bit VESA | SL1 - |
| | | local bus slots | SL3 |
|-------------------+----------+------------------+----------|
| Turbo LED | JP16 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|------------------------------------+--------+--------------|
| » | Monitor type select color | JP1 | Closed |
|---+--------------------------------+--------+--------------|
| | Monitor type select monochrome | JP1 | Open |
|---+--------------------------------+--------+--------------|
| » | CMOS memory normal operation | JP2 | pins 2 & 3 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| | CMOS memory clear | JP2 | 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) 256K x 9 | (4) 1M 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 |
|------------------+--------------------+--------------------|
| 20MB | (4) 4M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|------------+---------------+---------------+---------------|
| 32KB | (4) 8K x 8 | NONE | (1) 8K x 8 |
|------------+---------------+---------------+---------------|
| 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 | JP6 | JP7 | JP9 | JP11 |
|-------+--------+--------+--------+-------------------------|
| 32KB | Open | Open | Open | pins 2 & 3 closed |
|-------+--------+--------+--------+-------------------------|
| 64KB | Open | Closed | Open | pins 1 & 2 closed |
|-------+--------+--------+--------+-------------------------|
| 128KB | Open | Closed | Closed | pins 1 & 2, 3 & 4 |
| | | | | closed |
|-------+--------+--------+--------+-------------------------|
| 256KB | Closed | Closed | Closed | pins 1 & 2, 4 & 5 |
| | | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP4 |
|--------------------------+---------------------------------|
| 80486SX | pins 5 & 6 closed |
|--------------------------+---------------------------------|
| 80487SX | pins 2 & 3, 4 & 5, 6 & 7 closed |
|--------------------------+---------------------------------|
| 80486DX/DX2 | pins 1 & 2, 4 & 5, 6 & 7 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP29 | JP30 | JP31 |
|---------------+--------------+--------------+--------------|
| 25MHz | Closed | Open | Closed |
|---------------+--------------+--------------+--------------|
| 33MHz | Closed | Closed | Open |
|---------------+--------------+--------------+--------------|
| 40MHz | Open | Open | Closed |
|---------------+--------------+--------------+--------------|
| 50iMHz | Closed | Open | Closed |
|---------------+--------------+--------------+--------------|
| 50MHz | Open | Closed | Open |
|---------------+--------------+--------------+--------------|
| 66iMHz | Closed | Closed | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VESA CLOCK SPEED CONFIGURATION |
|------------------------------------------------------------|
| CPU speed | JP43 |
|-------------------------------------+----------------------|
| Same phase as CPU | pins 2 & 3 closed |
|-------------------------------------+----------------------|
| Same phase as Toshiba U4800 chipset | pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BUS SPEED CONFIGURATION |
|------------------------------------------------------------|
| CPU speed | JP19 |
|-------------------------------+----------------------------|
| <=33MHz | Open |
|-------------------------------+----------------------------|
| >33MHz | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VESA WAIT STATE CONFIGURATION |
|------------------------------------------------------------|
| Wait states | JP20 |
|-------------------------------+----------------------------|
| 0 wait states | Open |
|-------------------------------+----------------------------|
| 1 wait state | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VESA MASTER/SLAVE CONFIGURATION |
|------------------------------------------------------------|
| Setting | JP40 | JP41 | JP42 | JP44 | JP45 |
|-------------+--------+--------+--------+---------+---------|
| PAL/GAL | Open | Open | Open | pins 1 | pins 2 |
| installed | | | | & 2 | & 3 |
| | | | | closed | closed |
|-------------+--------+--------+--------+---------+---------|
| PAL/GAL not | Closed | Closed | Closed | pins 2 | pins 2 |
| installed | | | | & 3 | & 3 |
| | | | | closed | closed |
+------------------------------------------------------------+