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# AST RESEARCH, INC.
BRAVO LP (202536-0XX)
Processor 80486SX/80487SX/80486DX/ODP486SX/80486DX2/Pentium
Overdrive
Processor 25/33/50(internal)/66(internal)MHz
Speed
Chip Set AST
Max. Onboard 64MB
DRAM
Cache 64KB (with external cache card)
BIOS AST
Dimensions 330mm x 218mm
I/O Options Floppy drive interface, IDE interface, parallel
port, PS/2 mouse port, serial ports (2), VGA
feature connector, VGA port
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------------+----------+----------------+----------|
| Front panel | J2 | IDE interface | J22 |
| connector | | | |
|---------------------+----------+----------------+----------|
| PS/2 mouse port | J12 | Floppy drive | J24 |
| | | interface | |
|---------------------+----------+----------------+----------|
| Parallel port | J13 | Speaker | J27 |
|---------------------+----------+----------------+----------|
| Serial port 1 | J14 | Chassis fan | J28 |
| | | power | |
|---------------------+----------+----------------+----------|
| Personality module | J15, | IDE interface | J40 |
| connectors | J16, J46 | LED | |
|---------------------+----------+----------------+----------|
| VGA port | J18 | Cache module | J50 - |
| | | connectors | J53 |
|---------------------+----------+----------------+----------|
| VGA feature | J19 | Riser Card | SL1 |
| connector | | | |
|---------------------+----------+----------------+----------|
| Serial port 2 | J20 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper/Switch | Position |
|-------------------------------+---------------+------------|
| » | CMOS memory normal | E1 | Open |
| | operation | | |
|---+---------------------------+---------------+------------|
| | CMOS memory clear | E1 | Closed |
|---+---------------------------+---------------+------------|
| » | Parallel port IRQ select | E7 | pins 1 & 2 |
| | IRQ7 | | closed |
|---+---------------------------+---------------+------------|
| | Parallel port IRQ select | E7 | pins 2 & 3 |
| | IRQ5 | | closed |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | E9 | Open |
| | not alter | | |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | E800 | pins 1 & 2 |
| | not alter | | closed |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | E801 | pins 2 & 3 |
| | not alter | | closed |
|---+---------------------------+---------------+------------|
| » | Power management enabled | E802 | pins 1 & 2 |
| | | | closed |
|---+---------------------------+---------------+------------|
| | Power management disabled | E802 | pins 2 & 3 |
| | | | closed |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | E803 | pins 1 & 2 |
| | not alter | | closed |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | E804 | pins 1 & 2 |
| | not alter | | closed |
|---+---------------------------+---------------+------------|
| » | On board video enabled | SW1/1 | Off |
|---+---------------------------+---------------+------------|
| | On board video disabled | SW1/1 | On |
|---+---------------------------+---------------+------------|
| » | POST type select normal | SW1/2 | Off |
|---+---------------------------+---------------+------------|
| | POST type select loop | SW1/2 | On |
|---+---------------------------+---------------+------------|
| » | Boot type select normal | SW1/3 | Off |
|---+---------------------------+---------------+------------|
| | Boot type select flash | SW1/3 | On |
| | BIOS update | | |
|---+---------------------------+---------------+------------|
| » | Password enabled | SW1/4 | Off |
|---+---------------------------+---------------+------------|
| | Password disabled | SW1/4 | On |
|---+---------------------------+---------------+------------|
| » | Monitor type select color | SW1/5 | On |
|---+---------------------------+---------------+------------|
| | Monitor type select | SW1/5 | Off |
| | monochrome | | |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | SW1/6 | Off |
| | not alter | | |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | SW1/7 | Off |
| | not alter | | |
|---+---------------------------+---------------+------------|
| » | System setup type select | SW1/8 | Off |
| | allow access | | |
|---+---------------------------+---------------+------------|
| | System setup type select | SW1/8 | On |
| | deny access | | |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | SW1/9 | Off |
| | not alter | | |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | SW1/10 | Off |
| | not alter | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 | | |
|------+-------------+-------------+------------+------------|
| 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) 1M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 5MB | (1) 1M x 36 | (1) 256K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 6MB | (1) 1M x 36 | (1) 256K x | (1) 256K x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 7MB | (1) 1M x 36 | (1) 256K x | (1) 256K x | (1) 256K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 | 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 | |
|------+-------------+-------------+------------+------------|
| 13MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| 16MB | (1) 4M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 17MB | (1) 4M x 36 | (1) 256K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 18MB | (1) 4M x 36 | (1) 256K x | (1) 256K x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 19MB | (1) 4M x 36 | (1) 256K x | (1) 256K x | (1) 256K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 20MB | (1) 4M x 36 | (1) 1M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 21MB | (1) 4M x 36 | (1) 1M x 36 | (1) 256K x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 22MB | (1) 4M x 36 | (1) 1M x 36 | (1) 256K x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 4M x 36 | (1) 1M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 25MB | (1) 4M x 36 | (1) 1M x 36 | (1) 1M x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 28MB | (1) 4M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 4M x 36 | (1) 4M x 36 | 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 | |
|------+-------------+-------------+------------+------------|
| 37MB | (1) 4M x 36 | (1) 4M x 36 | (1) 1M x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 4M x 36 | (1) 4M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 48MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 49MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 52MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 64MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU UPGRADE CONFIGURATION |
|------------------------------------------------------------|
| Type | E2 | E3 | E4 | E5 | E6 |
|------------------+---------+-------+-------+-------+-------|
| None | N/A | N/A | N/A | N/A | 2 & 3 |
|------------------+---------+-------+-------+-------+-------|
| 80486SX | Open | Open | 2 & 3 | 2 & 3 | 1 & 2 |
|------------------+---------+-------+-------+-------+-------|
| 80487SX | Closed | 1 & 2 | 1 & 2 | 2 & 3 | 2 & 3 |
|------------------+---------+-------+-------+-------+-------|
| 80486DX/DX2 | Closed | 2 & 3 | 1 & 2 | 2 & 3 | 1 & 2 |
|------------------+---------+-------+-------+-------+-------|
| Overdrive (ODPR) | Closed | 2 & 3 | 1 & 2 | 2 & 3 | 1 & 2 |
|------------------+---------+-------+-------+-------+-------|
| Overdrive (ODP) | Closed | 1 & 2 | 1 & 2 | 2 & 3 | 2 & 3 |
|------------------+---------+-------+-------+-------+-------|
| Overdrive (P24T) | Closed | 1 & 2 | 1 & 2 | 1 & 2 | 2 & 3 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | E8 |
|------------------------------+-----------------------------|
| 25MHz | Open |
|------------------------------+-----------------------------|
| 33MHz | Closed |
|------------------------------+-----------------------------|
| 50iMHz | Open |
|------------------------------+-----------------------------|
| 66iMHz | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VIDEO MEMORY CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|---------+----------------+----------------+----------------|
| 512KB | (1) 256K x 16 | NONE | NONE |
|---------+----------------+----------------+----------------|
| 1MB | (1) 256K x 16 | (1) 256K x 16 | NONE |
|---------+----------------+----------------+----------------|
| 2MB | (1) 256K x 16 | (1) 256K x 16 | (2) 256K x 16 |
|------------------------------------------------------------|
| Note: Bank 0 is factory installed and is not configurable. |
+------------------------------------------------------------+