AST RESEARCH, INC.
BRAVO LC (94) (202594-XXX)
|
Processor |
80486SX/80486DX/ODP486SX/Pentium Overdrive |
|
Processor Speed |
25/33MHz |
|
Chip Set |
AST |
|
Max. Onboard DRAM |
64MB |
|
Cache |
64/256KB |
|
BIOS |
AMI |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
32-bit VESA local bus slot, floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2), VGA port, VGA feature connector |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
PS/2 mouse port |
J12 |
IDE interface |
J22 |
|
Parallel port |
J13 |
Floppy drive interface |
J24 |
|
Serial port 1 |
J14 |
Chassis fan power |
J28 |
|
VGA port |
J18 |
Front panel LED connector |
J29 |
|
VGA feature connector |
J19 |
32-bit VESA Local bus slot |
SL1 |
|
Serial port 2 |
J20 | ||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
» |
VESA cache write through enabled |
E1 |
pins 1 & 2 closed |
|
VESA cache write back enabled |
E1 |
pins 2 & 3 closed | |
|
» |
Parallel port IRQ select IRQ7 |
E2 |
pins 1 & 2 closed |
|
Parallel port IRQ select IRQ5 |
E2 |
pins 2 & 3 closed | |
|
» |
On board video enabled |
E7 |
Closed |
|
On board video disabled |
E7 |
Open | |
|
» |
Monitor type select color |
E8 |
Closed |
|
Monitor type select monochrome |
E8 |
Open | |
|
» |
Factory configured - do not alter |
E9 |
pins 1 & 2 closed |
|
» |
CMOS memory normal operation |
E10 |
Closed |
|
CMOS memory clear |
E10 |
Open | |
|
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 |
|
DRAM CONFIGURATION | ||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
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 |
E12 |
E14 |
|
64KB |
Open |
Open |
|
256KB |
Closed |
Closed |
|
CPU TYPE CONFIGURATION | |||||
|
Type |
E3 |
E4 |
E5 |
E6 |
E13 |
|
80486SX PQFP |
2 & 3 |
2 & 3 |
2 & 3 |
1 & 2 |
Open |
|
80486SX PGA |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
Closed |
|
80486DX |
2 & 3 |
2 & 3 |
2 & 3 |
1 & 2 |
Closed |
|
ODP80486SX |
2 & 3 |
2 & 3 |
2 & 3 |
1 & 2 |
Closed |
|
Pentium Overdrive |
2 & 3 |
1 & 2 |
2 & 3 |
1 & 2 |
Closed |
|
Note: Jumper E6 set with pins 1 & 2 closed enables write through cache, pins 2 & 3 closed enabled write back cache. If write back is enabled, and pins 2 & 3 closed on jumper E1, write back mode is enabled for SL1. | |||||
|
CPU SPEED CONFIGURATION | |
|
Speed |
E15 |
|
25MHz |
Closed |
|
33MHz |
Open |
|
VIDEO MEMORY CONFIGURATION | ||
|
Size |
Bank 0 |
Bank 1 |
|
512KB |
(4) 256K x 4 |
NONE |
|
1MB |
(4) 256K x 4 |
(4) 256K x 4 |
|
Note: Bank O is factory installed and is not configurable. | ||