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# FORTRESS SYSTEMS INTERNATIONAL
GENESIS II 486 VESA/ISA
Processor CX486SX/AM486SX/80486SX/CX486DX/AM486DX/80486DX/
CX486DX2/AM486DX2/80486DX2/CX486DX4/AM486DX4/80486DX4
Processor 25/33/40/50(internal)/50/66(internal)/75(internal)/80(internal)/
Speed 100(internal)/120(internal)MHz
Chip Set Unidentified
Video Chip None
Set
Maximum 64MB
Onboard
Memory
Maximum None
Video
Memory
Cache 128/256/512/1024KB
BIOS AMI/Award/MR BIOS
Dimensions 254mm x 218mm
I/O 32-bit VESA local bus slots (3), green PC connector
Options
NPU None
Options
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------+----------+----------------------+----------|
| Power LED & | JP16 | Green PC connector | JP20 |
| keylock | | | |
|---------------+----------+----------------------+----------|
| Speaker | JP17 | Turbo LED | JP21 |
|---------------+----------+----------------------+----------|
| Green PC LED | JP18 | Reset switch | JP26 |
|---------------+----------+----------------------+----------|
| Turbo switch | JP19 | 32-bit VESA local | SL1 – |
| | | bus slots | SL3 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|----------------------------------+-------+-----------------|
| » | CMOS memory normal operation | JP1 | Pins 1 & 2 |
| | | | closed |
|---+------------------------------+-------+-----------------|
| | CMOS memory clear | JP1 | Pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 1MB | (1) 256K x | None | None | None |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 2MB | (1) 256K x | (1) 256K x | None | None |
| | 36 | 36 | | |
|------+-------------+-------------+------------+------------|
| 2MB | (1) 512K x | None | None | None |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 3MB | (1) 256K x | (1) 512K x | None | None |
| | 36 | 36 | | |
|------+-------------+-------------+------------+------------|
| 3MB | (1) 256K x | (1) 256K x | (1) 256K x | None |
| | 36 | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 256K x | (1) 256K x | (1) 256K x | (1) 256K x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 512K x | (1) 512K x | None | None |
| | 36 | 36 | | |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 1M x 36 | None | None | None |
|------+-------------+-------------+------------+------------|
| 5MB | (1) 256K x | (1) 1M x 36 | None | None |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 5MB | (1) 256K x | (1) 256K x | (1) 256K x | (1) 512K x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 6MB | (1) 512K x | (1) 1M x 36 | None | None |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 2M x 36 | (1) 2M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 4M x 36 | None | None | None |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 4M x 36 | (1) 4M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 48MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 64MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
|------------------------------------------------------------|
| Note: Board accepts x 32 SIMMs. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Setting | JP70 |
|----------------------------+-------------------------------|
| 1 BK installed | Pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 2 BK installed | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 128KB | (4) 32K x 8 | None |
|------------------+--------------------+--------------------|
| 256KB (A) | (4) 32K x 8 | (4) 32K x 8 |
|------------------+--------------------+--------------------|
| 256KB (B) | (4) 64K x 8 | None |
|------------------+--------------------+--------------------|
| 512KB (A) | (4) 128K x 8 | None |
|------------------+--------------------+--------------------|
| 512KB (B) | (4) 64K x 8 | (4) 64K x 8 |
|------------------+--------------------+--------------------|
| 1MB | (4) 128K x 8 | (4) 128K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP6 | JP11 | JP12 |
|-----------+----------------+---------------+---------------|
| 128KB | Open | Pins 2 & 3 | Pins 1 & 2 |
| | | closed | closed |
|-----------+----------------+---------------+---------------|
| 256KB (A) | Open | Pins 1 & 2 | Pins 1 & 2 |
| | | closed | closed |
|-----------+----------------+---------------+---------------|
| 256KB (B) | Open | Pins 2 & 3 | Pins 1 & 2 |
| | | closed | closed |
|-----------+----------------+---------------+---------------|
| 512KB (A) | Open | Pins 2 & 3 | Pins 2 & 3 |
| | | closed | closed |
|-----------+----------------+---------------+---------------|
| 512KB (B) | Pins 1 & 2 | Open | Pins 2 & 3 |
| | closed | | closed |
|-----------+----------------+---------------+---------------|
| 1MB | Pins 2 & 3 | Open | Pins 2 & 3 |
| | closed | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
| Speed | JP2A | JP2B | JP2C | JP22 |
|---------+--------+-------------------+------------+--------|
| 25MHz | Closed | Pins 1 & 2 closed | Pins 2 & 3 | Open |
| | | | closed | |
|---------+--------+-------------------+------------+--------|
| 33MHz | Closed | Pins 2 & 3 closed | Pins 1 & 2 | Open |
| | | | closed | |
|---------+--------+-------------------+------------+--------|
| 40MHz | Open | Pins 1 & 2 closed | Pins 2 & 3 | Closed |
| | | | closed | |
|---------+--------+-------------------+------------+--------|
| 50iMHz | Closed | Pins 1 & 2 closed | Pins 2 & 3 | Open |
| | | | closed | |
|---------+--------+-------------------+------------+--------|
| 50MHz | Open | Pins 2 & 3 closed | Pins 1 & 2 | Closed |
| | | | closed | |
|---------+--------+-------------------+------------+--------|
| 66iMHz | Closed | Pins 2 & 3 closed | Pins 1 & 2 | Open |
| | | | closed | |
|---------+--------+-------------------+------------+--------|
| 75iMHz | Closed | Pins 1 & 2 closed | Pins 2 & 3 | Open |
| | | | closed | |
|---------+--------+-------------------+------------+--------|
| 80iMHz | Open | Pins 1 & 2 closed | Pins 2 & 3 | Closed |
| | | | closed | |
|---------+--------+-------------------+------------+--------|
| 100iMHz | Closed | Pins 2 & 3 closed | Pins 1 & 2 | Open |
| | | | closed | |
|---------+--------+-------------------+------------+--------|
| 120iMHz | Open | Pins 1 & 2 closed | Pins 2 & 3 | Closed |
| | | | closed | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | JP15 |
|----------------------------+-------------------------------|
| Cyrix | Pins 2 & 3 closed |
|----------------------------+-------------------------------|
| AMD | Pins 1 & 2 closed |
|----------------------------+-------------------------------|
| Intel | Pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VL BUS SPEED SELECTION |
|------------------------------------------------------------|
| Speed | JP13 |
|-------------------------------+----------------------------|
| <= 33MHz | Closed |
|-------------------------------+----------------------------|
| >33 MHz | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLASH BIOS VOLTAGE SELECTION |
|------------------------------------------------------------|
| Voltage | JP5 | JP80 |
|------------+--------------------+--------------------------|
| 5v | Pins 1 & 2 closed | Pins 1 & 3, 2 & 4 closed |
|------------+--------------------+--------------------------|
| 12v | Pins 2 & 3 closed | Pins 3 & 5, 4 & 6 closed |
+------------------------------------------------------------+