AST RESEARCH, INC.
PREMIUM 386C
|
Processor |
80386DX |
|
Processor Speed |
20MHz |
|
Chip Set |
AST |
|
Max. Onboard DRAM |
None (16MB on 32-bit external memory card) |
|
Cache |
None (64KB on 32-bit external memory card) |
|
BIOS |
AST |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
32-bit external memory card slot, parallel port, serial ports (2), SMART expansion/16-bit ISA expansion slots (3) |
|
NPU Options |
80287/80387 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
32-bit external memory card |
J7 |
Front panel switches & LEDs |
P5 |
|
SMART expansion or 16-bit ISA |
S1, S2 & S3 |
Speaker |
P6 |
|
Serial port 2 header |
P2 |
External battery |
P8 |
|
Floppy drive interface (A: and B:) |
P3 |
Optional ROM (odd) |
U89 |
|
Third floppy drive interface |
P4 |
Optional ROM (even) |
U88 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Serial port 1 |
COM1 |
Parallel port |
LPT1 |
|
Serial port 2 |
COM2 |
Keyboard |
KYBD |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
Factory configured - do not alter |
E1 |
closed | |
|
Factory configured - do not alter |
E2 |
closed | |
|
Factory configured - do not alter |
E3 |
closed | |
|
Factory configured - do not alter |
E4 |
open | |
|
Factory configured - do not alter |
E5 |
closed | |
|
Factory configured - do not alter |
E6 |
open | |
|
Note:Jumper E6 may not appear on all board revisions. | |||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Switch |
Position | |
|
Parity check enabled |
SW1/switch 7 |
closed | |
|
Parity check disabled |
SW1/switch 7 |
open | |
|
DRAM CONFIGURATION | ||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
1MB 1 |
(4) 256K x 9 |
NONE |
NONE |
NONE |
|
2MB 1 |
(4) 256K x 9 |
(4) 256K x 9 |
NONE |
NONE |
|
3MB 1 |
(4) 256K x 9 |
(4) 256K x 9 |
(4) 256K x 9 |
NONE |
|
4MB 1 |
(4) 256K x 9 |
(4) 256K x 9 |
(4) 256K x 9 |
(4) 256K x 9 |
|
4MB 2 |
(4) 1M x 9 |
NONE |
NONE |
NONE |
|
5MB 1 |
(4) 256K x 9 |
(4) 1M x 9 |
NONE |
NONE |
|
6MB 1 |
(4) 256K x 9 |
(4) 256K x 9 |
(4) 1M x 9 |
NONE |
|
7MB 1 |
(4) 256K x 9 |
(4) 256K x 9 |
(4) 256K x 9 |
(4) 1M x 9 |
|
8MB 2 |
(4) 1M x 9 |
(4) 1M x 9 |
NONE |
NONE |
|
9MB 1 |
(4) 256K x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
NONE |
|
10MB 1 |
(4) 256K x 9 |
(4) 256K x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
|
12MB 2 |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
NONE |
|
13MB 1 |
(4) 256K x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
|
16MB 2 |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
|
Notes 1 & 2 :Please see the next table for the proper switch settings for this configuration. | ||||
|
DRAM SWITCH CONFIGURATION | ||||||||
|
Size |
SW1/1 |
SW1/2 |
SW1/3 |
SW1/4 |
SW1/5 |
SW1/6 |
SW1/7 |
SW1/8 |
|
1MB 1 |
open |
open |
open |
open |
open |
open |
closed |
open |
|
2MB 1 |
open |
closed |
open |
open |
open |
open |
closed |
open |
|
3MB 1 |
open |
closed |
open |
closed |
open |
open |
closed |
open |
|
4MB 1 |
open |
closed |
open |
closed |
open |
closed |
closed |
open |
|
4MB 2 |
open |
open |
open |
closed |
open |
closed |
closed |
closed |
|
5MB 1 |
closed |
open |
open |
open |
open |
open |
closed |
open |
|
6MB 1 |
open |
closed |
closed |
open |
open |
open |
closed |
open |
|
7MB 1 |
open |
closed |
open |
closed |
closed |
open |
closed |
open |
|
8MB 2 |
closed |
open |
open |
open |
open |
open |
closed |
closed |
|
9MB 1 |
closed |
open |
closed |
open |
open |
open |
closed |
open |
|
10MB 1 |
open |
closed |
closed |
open |
closed |
open |
closed |
open |
|
12MB 2 |
closed |
open |
closed |
open |
open |
open |
closed |
closed |
|
13MB 1 |
closed |
open |
closed |
open |
closed |
open |
closed |
open |
|
16MB 2 |
closed |
open |
closed |
open |
closed |
open |
closed |
closed |
|
Notes 1 & 2 :Please see the previous table for the proper configuration for these switch settings. | ||||||||
|
SRAM CONFIGURATION | |
|
Size |
Cache SRAM |
|
64KB |
(8) 8K x 8 on a SIMM-type module (AST Part# 202303-001) |