AST RESEARCH, INC.
PREMMIA MX 4/66D, PREMMIA MX 4/100T
|
Processor |
80486SX/486 Overdrive/80486DX/80486DX2/80486DX4/P24T |
|
Processor Speed |
25/33/50(internal)/66(internal)/100(internal)MHz |
|
Chip Set |
Unidentified |
|
Video Chip Set |
ATI |
|
Maximum Onboard Memory |
128MB |
|
Maximum Video Memory |
4MB |
|
Cache |
64/256KB |
|
BIOS |
Unidentified |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
Floppy drive interface, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2), riser slot |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
PS/2 mouse port |
CN2 |
External battery |
J26 |
|
Serial port |
CN3 |
Speaker |
J27 |
|
Serial port |
CN4 |
Chassis fan power |
J28 |
|
Parallel port |
CN5 |
Front console LED |
J29 pins 1 - 4 |
|
IDE interface 1 |
J22 |
Chassis fan power |
J32 |
|
IDE interface 2 |
J23 |
IDE interface LED |
J40 |
|
Floppy drive interface |
J24 |
Riser slot |
SL1 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Label |
Position | |
|
» |
Factory configured - do not alter |
E6 |
Pins 1 & 2 closed |
|
» |
CMOS memory normal operation |
E8 |
Open |
|
CMOS memory clear |
E8 |
Closed | |
|
» |
Flash BIOS normal operation |
SW1/1 |
Off |
|
Flash BIOS force update at boot |
SW1/1 |
On | |
|
» |
Password normal operation |
SW1/2 |
On |
|
Password clear |
SW1/2 |
Off | |
|
» |
Monitor type select color |
SW1/3 |
On |
|
Monitor type select monochrome |
SW1/3 |
Off | |
|
» |
Setup access enabled |
SW1/4 |
Off |
|
Setup access disabled |
SW1/4 |
On | |
|
» |
Factory configured - do not alter |
SW1/5 |
Off |
|
» |
Factory configured - do not alter |
SW1/6 |
On |
|
» |
Factory configured - do not alter |
SW1/7 |
On |
|
» |
Factory configured - do not alter |
SW1/8 |
On |
|
DRAM CONFIGURATION | ||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
4MB |
(1) 1M x 32 |
None |
None |
None |
|
8MB |
(1) 2M x 32 |
None |
None |
None |
|
8MB |
(1) 1M x 32 |
(1) 1M x 32 |
None |
None |
|
9MB |
(1) 1M x 32 |
(1) 1M x 32 |
(1) 256K x 32 |
None |
|
10MB |
(1) 1M x 32 |
(1) 1M x 32 |
(1) 256K x 32 |
(1) 256K x 32 |
|
12MB |
(1) 1M x 32 |
(1) 1M x 32 |
(1) 1M x 32 |
None |
|
16MB |
(1) 1M x 32 |
(1) 1M x 32 |
(1) 1M x 32 |
(1) 1M x 32 |
|
16MB |
(1) 4M x 32 |
None |
None |
None |
|
17MB |
(1) 2M x 32 |
(1) 2M x 32 |
(1) 256K x 32 |
None |
|
18MB |
(1) 2M x 32 |
(1) 2M x 32 |
(1) 256K x 32 |
(1) 256K x 32 |
|
20MB |
(1) 2M x 32 |
(1) 2M x 32 |
(1) 1M x 32 |
None |
|
24MB |
(1) 2M x 32 |
(1) 2M x 32 |
(1) 1M x 32 |
(1) 1M x 32 |
|
DRAM CONFIGURATION (CON’T) | ||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
24MB |
(1) 2M x 32 |
(1) 2M x 32 |
(1) 2M x 32 |
None |
|
32MB |
(1) 2M x 32 |
(1) 2M x 32 |
(1) 2M x 32 |
(1) 2M x 32 |
|
32MB |
(1) 8M x 32 |
None |
None |
None |
|
32MB |
(1) 4M x 32 |
(1) 4M x 32 |
None |
None |
|
33MB |
(1) 4M x 32 |
(1) 4M x 32 |
(1) 256K x 32 |
NONE |
|
34MB |
(1) 4M x 32 |
(1) 4M x 32 |
(1) 256K x 32 |
(1) 256K x 32 |
|
36MB |
(1) 4M x 32 |
(1) 4M x 32 |
(1) 1M x 32 |
NONE |
|
40MB |
(1) 4M x 32 |
(1) 4M x 32 |
(1) 1M x 32 |
(1) 1M x 32 |
|
40MB |
(1) 4M x 32 |
(1) 4M x 32 |
(1) 2M x 32 |
NONE |
|
48MB |
(1) 4M x 32 |
(1) 4M x 32 |
(1) 2M x 32 |
(1) 2M x 32 |
|
48MB |
(1) 4M x 32 |
(1) 4M x 32 |
(1) 4M x 32 |
NONE |
|
64MB |
(1) 4M x 32 |
(1) 4M x 32 |
(1) 4M x 32 |
(1) 4M x 32 |
|
64MB |
(1) 8M x 32 |
(1) 8M x 32 |
NONE |
NONE |
|
66MB |
(1) 8M x 32 |
(1) 8M x 32 |
(1) 256K x 32 |
(1) 256K x 32 |
|
68MB |
(1) 8M x 32 |
(1) 8M x 32 |
(1) 1M x 32 |
NONE |
|
72MB |
(1) 8M x 32 |
(1) 8M x 32 |
(1) 1M x 32 |
(1) 1M x 32 |
|
72MB |
(1) 8M x 32 |
(1) 8M x 32 |
(1) 2M x 32 |
NONE |
|
80MB |
(1) 8M x 32 |
(1) 8M x 32 |
(1) 2M x 32 |
(1) 2M x 32 |
|
80MB |
(1) 8M x 32 |
(1) 8M x 32 |
(1) 4M x 32 |
NONE |
|
96MB |
(1) 8M x 32 |
(1) 8M x 32 |
(1) 4M x 32 |
(1) 4M x 32 |
|
96MB |
(1) 8M x 32 |
(1) 8M x 32 |
(1) 8M x 32 |
NONE |
|
128MB |
(1) 8M x 32 |
(1) 8M x 32 |
(1) 8M x 32 |
(1) 8M x 32 |
|
CACHE CONFIGURATION | |||
|
Size |
Bank 0 |
Bank 1 |
TAG |
|
64KB |
(4) 8K x 8 |
(4) 8K x 8 |
(1) 8K x 9 |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
(1) 32K x 9 |
|
CACHE JUMPER CONFIGURATION | |
|
Size |
E5 |
|
64KB |
Open |
|
256KB |
Closed |
|
CPU SPEED SELECTION | ||
|
Speed |
E7 |
E9 |
|
25MHz |
Pins 1 & 2 closed |
Closed |
|
33MHz |
Pins 2 & 3 closed |
Open |
|
50iMHz |
Pins 1 & 2 closed |
Closed |
|
66iMHz |
Pins 2 & 3 closed |
Open |
|
100iMHz |
Pins 1 & 2 closed |
Closed |
|
Note: If 100iMHz is used, jumper E4 must be open. | ||
|
CPU SPEED SELECTION (80486DX4 ONLY) | |
|
Voltage |
E4 |
|
2x |
Pins 2 & 3 closed |
|
2.5x |
Pins 1 & 2 closed |
|
3x |
Open |
|
CPU TYPE SELECTION | ||||
|
Type |
E1 |
E2 |
E3 |
E10 |
|
80486SX (PQFP) |
Open |
Pins 2 & 3 closed |
Pins 1 & 2 closed |
Closed |
|
486 Overdrive |
Open |
Pins 2 & 3 closed |
Pins 1 & 2 closed |
Closed |
|
80486DX |
Open |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
Closed |
|
80486DX2 |
Open |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
Closed |
|
80486DX2 (WB) |
Open |
Pins 1 & 2 closed |
Pins 2 & 3 closed |
Open |
|
80486DX4 |
Open |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
Closed |
|
P24T |
Open |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
Open |
|
Note: E10 may not be present not on all boards. To use write through cache on P24T, set E1 to the closed position. | ||||
|
CPU VOLTAGE CONFIGURATION | ||||||
|
Voltage |
E11 |
E12 |
E13 |
E14 |
E15 |
E16 |
|
3v Cyrix |
2 & 3 |
2 & 3 |
2 & 3 |
2 & 3 |
Open |
1 & 2 |
|
3v Intel |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
Closed |
2 & 3 |
|
5v Cyrix |
2 & 3 |
2 & 3 |
2 & 3 |
2 & 3 |
Open |
Open |
|
5v Intel |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
Closed |
Open |
|
Note: Pins designated should be in the closed position. The location of E12 is unidentified. The above jumpers may not be present on all boards. If these jumpers are not present, only Intel CPUs may be used. | ||||||