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# AST RESEARCH, INC.
BRAVO MS, MS-T, MS-L PENTIUM (RATTLER) (202653-XXX)
Processor Pentium
Processor 60/66/90/100MHz
Speed
Chip Set AST
Max. Onboard 128MB
DRAM
Cache 512KB
BIOS AMI
Dimensions 330mm x 218mm
I/O Options Floppy drive interface, IDE interfaces (2),
parallel port, serial ports (2), PS/2 mouse port,
VGA feature connector, VGA port
NPU Options None
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| VGA port | CN1 | Floppy drive | J24 |
| | | interface | |
|------------------+----------+-------------------+----------|
| Parallel port | CN2 | Speaker | J27 |
|------------------+----------+-------------------+----------|
| Serial port 2 | CN3 | Chassis fan power | J28 |
|------------------+----------+-------------------+----------|
| Serial port 1 | CN4 | Front panel | J29 |
| | | connector | |
|------------------+----------+-------------------+----------|
| PS/2 mouse port | CN5 | Power LED & | J32 |
| | | keylock | |
|------------------+----------+-------------------+----------|
| VGA feature | J19 | IDE interface LED | J40 |
| connector | | | |
|------------------+----------+-------------------+----------|
| IDE interface 2 | J22 | Video memory | SL1 |
| | | upgrade slot | |
|------------------+----------+-------------------+----------|
| IDE interface 1 | J23 | Riser Card | SL2 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|---------------------------------------+---------+----------|
| » | Factory configured - do not alter | E4 | Open |
|---+-----------------------------------+---------+----------|
| » | Factory configured - do not alter | E5 | Open |
|---+-----------------------------------+---------+----------|
| » | Factory configured - do not alter | E6 | Open |
|---+-----------------------------------+---------+----------|
| » | Factory configured - do not alter | E8 | Open |
|---+-----------------------------------+---------+----------|
| » | Monitor type select color | E9 | Closed |
|---+-----------------------------------+---------+----------|
| | Monitor type select monochrome | E9 | Open |
|---+-----------------------------------+---------+----------|
| » | System setup enabled | E10 | Closed |
|---+-----------------------------------+---------+----------|
| | System setup disabled | E10 | Open |
|---+-----------------------------------+---------+----------|
| » | On board video enabled | E11 | Closed |
|---+-----------------------------------+---------+----------|
| | On board video disabled | E11 | Open |
|---+-----------------------------------+---------+----------|
| » | Password enabled | E12 | Closed |
|---+-----------------------------------+---------+----------|
| | Password disabled | E12 | Open |
|---+-----------------------------------+---------+----------|
| » | Flash BIOS write protect enabled | E13 | Closed |
|---+-----------------------------------+---------+----------|
| | Flash BIOS write protect disabled | E13 | Open |
|---+-----------------------------------+---------+----------|
| » | CMOS memory normal operation | J26 | Closed |
|---+-----------------------------------+---------+----------|
| | CMOS memory clear | J26 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 1M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 2M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 9MB | (1) 1M x 36 | (1) 1M x 36 | (1) 256K x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 10MB | (1) 1M x 36 | (1) 1M x 36 | (1) 256K x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 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) 4M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 17MB | (1) 4M x 36 | (1) 1M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 18MB | (1) 2M x 36 | (1) 2M x 36 | (1) 256K x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 20MB | (1) 2M x 36 | (1) 2M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 2M x 36 | (1) 2M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 2M x 36 | (1) 2M x 36 | (1) 2M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 2M x 36 | (1) 2M x 36 | (1) 2M x | (1) 2M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 4M x 36 | (1) 4M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 8M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 33MB | (1) 4M x 36 | (1) 4M x 36 | (1) 256K x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 34MB | (1) 4M x 36 | (1) 4M x 36 | (1) 256K x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 36MB | (1) 4M x 36 | (1) 4M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 4M x 36 | (1) 4M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 4M x 36 | (1) 4M x 36 | (1) 2M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 48MB | (1) 4M x 36 | (1) 4M x 36 | (1) 2M x | (1) 2M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 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 |
|------+-------------+-------------+------------+------------|
| 64MB | (1) 8M x 36 | (1) 8M x 36 | NONE | NONE |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|-------+-------------+----------+--------------+------------|
| 66MB | (1) 8M x 36 | (1) 8M x | (1) 256K x | (1) 256K x |
| | | 36 | 36 | 36 |
|-------+-------------+----------+--------------+------------|
| 68MB | (1) 8M x 36 | (1) 8M x | (1) 1M x 36 | NONE |
| | | 36 | | |
|-------+-------------+----------+--------------+------------|
| 72MB | (1) 8M x 36 | (1) 8M x | (1) 1M x 36 | (1) 1M x |
| | | 36 | | 36 |
|-------+-------------+----------+--------------+------------|
| 72MB | (1) 8M x 36 | (1) 8M x | (1) 2M x 36 | NONE |
| | | 36 | | |
|-------+-------------+----------+--------------+------------|
| 80MB | (1) 8M x 36 | (1) 8M x | (1) 2M x 36 | (1) 2M x |
| | | 36 | | 36 |
|-------+-------------+----------+--------------+------------|
| 80MB | (1) 8M x 36 | (1) 8M x | (1) 4M x 36 | NONE |
| | | 36 | | |
|-------+-------------+----------+--------------+------------|
| 96MB | (1) 8M x 36 | (1) 8M x | (1) 4M x 36 | (1) 4M x |
| | | 36 | | 36 |
|-------+-------------+----------+--------------+------------|
| 96MB | (1) 8M x 36 | (1) 8M x | (1) 8M x 36 | NONE |
| | | 36 | | |
|-------+-------------+----------+--------------+------------|
| 128MB | (1) 8M x 36 | (1) 8M x | (1) 8M x 36 | (1) 8M x |
| | | 36 | | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 |
|----------------------------+-------------------------------|
| 512KB | (8) 64K x 8 |
|------------------------------------------------------------|
| Note: Cache is factory installed and is not configurable. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | E1 | E2 | E3 | E7 |
|---------+-------------------+----------+---------+---------|
| 60MHz | pins 1 & 2 closed | Open | Closed | Open |
|---------+-------------------+----------+---------+---------|
| 66MHz | pins 1 & 2 closed | Closed | Closed | Open |
|---------+-------------------+----------+---------+---------|
| 90MHz | pins 2 & 3 closed | Open | Closed | Open |
|---------+-------------------+----------+---------+---------|
| 100MHz | pins 2 & 3 closed | Open | Closed | Closed |
|------------------------------------------------------------|
| Note: Use these settings with IMI415 installed at U7. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | E1 | E2 | E3 | E7 |
|---------+-------------------+----------+---------+---------|
| 60MHz | pins 1 & 2 closed | Open | Closed | Closed |
|---------+-------------------+----------+---------+---------|
| 66MHz | pins 1 & 2 closed | Closed | Closed | Closed |
|---------+-------------------+----------+---------+---------|
| 90MHz | pins 2 & 3 closed | Open | Closed | Closed |
|---------+-------------------+----------+---------+---------|
| 100MHz | pins 2 & 3 closed | Open | Closed | Open |
|------------------------------------------------------------|
| Note: Use these settings with IMI470 installed at U7. |
+------------------------------------------------------------+