AST RESEARCH, INC.
BRAVO MT (202528-XXX)
|
Processor |
80486SX/80487SX/80486DX/ODP486SX/80486DX2/Pentium Overdrive |
|
Processor Speed |
25/33/50(internal)/66(internal)MHz |
|
Chip Set |
AST |
|
Max. Onboard DRAM |
64MB |
|
Cache |
64/256KB |
|
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 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Power LED & keylock |
E1 |
VGA port |
J18 |
|
Reset switch |
E3 |
VGA feature connector |
J19 |
|
IDE interface LED |
E4 |
IDE interface |
J22 |
|
PS/2 mouse port |
J12 |
Floppy drive interface |
J24 |
|
Parallel port |
J13 |
Chassis fan power |
J28 |
|
Serial ports (2) |
J10 & J44 | ||
|
Note: Serial port J44 is located under J10. | |||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper/Switch |
Position | |
|
» |
CMOS memory normal operation |
E5 |
Open |
|
CMOS memory clear |
E5 |
Closed | |
|
» |
Factory configured - do not alter |
E14 |
pins 1 & 2 closed |
|
» |
Parallel port IRQ select IRQ7 |
E15 |
pins 1 & 2 closed |
|
Parallel port IRQ select IRQ5 |
E15 |
pins 2 & 3 closed | |
|
» |
Factory configured - do not alter |
E800 |
pins 1 & 2 closed |
|
» |
Factory configured - do not alter |
E801 |
pins 2 & 3 closed |
|
» |
Power management enabled |
E802 |
pins 1 & 2 closed |
|
Power management disabled |
E802 |
pins 2 & 3 closed | |
|
» |
Factory configured - do not alter |
E803 |
pins 1 & 2 closed |
|
» |
Factory configured - do not alter |
E804 |
pins 1 & 2 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 test loop |
SW1/2 |
On | |
|
» |
Boot type select normal |
SW1/3 |
Off |
|
Boot type select flash BIOS update |
SW1/3 |
On | |
|
» |
Password enabled |
SW1/4 |
Off |
|
Password disabled |
SW1/4 |
On | |
|
» |
Monitor type select color |
SW1/5 |
On |
|
Monitor type select monochrome |
SW1/5 |
Off | |
|
» |
Factory configured - do not alter |
SW1/6 |
Off |
|
» |
Factory configured - do not alter |
SW1/7 |
Off |
|
» |
System setup type select allow access |
SW1/8 |
Off |
|
System setup type select deny access |
SW1/8 |
On | |
|
DRAM CONFIGURATION | ||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
1MB |
(1) 256K x 36 |
NONE |
NONE |
NONE |
|
2MB |
(1) 256K x 36 |
(1) 256K x 36 |
NONE |
NONE |
|
3MB |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
NONE |
|
4MB |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
|
4MB |
(1) 1M x 36 |
NONE |
NONE |
NONE |
|
5MB |
(1) 1M x 36 |
(1) 256K x 36 |
NONE |
NONE |
|
6MB |
(1) 1M x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
NONE |
|
7MB |
(1) 1M x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
|
8MB |
(1) 1M x 36 |
(1) 1M x 36 |
NONE |
NONE |
|
9MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 256K x 36 |
NONE |
|
10MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
|
12MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
NONE |
|
13MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 256K x 36 |
|
16MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
|
16MB |
(1) 4M x 36 |
NONE |
NONE |
NONE |
|
17MB |
(1) 4M x 36 |
(1) 256K x 36 |
NONE |
NONE |
|
18MB |
(1) 4M x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
NONE |
|
19MB |
(1) 4M x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
|
20MB |
(1) 4M x 36 |
(1) 1M x 36 |
NONE |
NONE |
|
21MB |
(1) 4M x 36 |
(1) 1M x 36 |
(1) 256K x 36 |
NONE |
|
22MB |
(1) 4M x 36 |
(1) 1M x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
|
24MB |
(1) 4M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
NONE |
|
25MB |
(1) 4M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 256K x 36 |
|
28MB |
(1) 4M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
|
32MB |
(1) 4M x 36 |
(1) 4M x 36 |
NONE |
NONE |
|
33MB |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 256K x 36 |
NONE |
|
34MB |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
|
36MB |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 1M x 36 |
NONE |
|
37MB |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 1M x 36 |
(1) 256K x 36 |
|
40MB |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
|
48MB |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
NONE |
|
49MB |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 256K x 36 |
|
52MB |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 1M x 36 |
|
64MB |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
|
CACHE CONFIGURATION | ||
|
Size |
Bank 0 |
TAG |
|
64KB |
(8) 8K x 8 |
(1) 8K x 8 |
|
256KB |
(8) 32K x 8 |
(1) 32K x 8 |
|
CACHE JUMPER CONFIGURATION | |||
|
Size |
E6 |
E7 |
E8 |
|
64KB |
pins 1 & 2 closed |
Open |
Open |
|
256KB |
pins 2 & 3 closed |
Closed |
Closed |
|
Note: Some later versions have omitted jumper E6. | |||
|
CPU UPGRADE CONFIGURATION | |||||
|
Type |
E9 |
E10 |
E11 |
E12 |
E13 |
|
None |
N/A |
N/A |
N/A |
N/A |
2 & 3 |
|
80486SX |
Open |
2 & 3 |
2 & 3 |
2 & 3 |
1 & 2 |
|
80487SX |
Closed |
1 & 2 |
1 & 2 |
2 & 3 |
1 & 2 |
|
80486DX/DX2 |
Closed |
2 & 3 |
1 & 2 |
2 & 3 |
2 & 3 |
|
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 |
E16 |
|
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. | |||