AMERICAN MEGATRENDS, INC.
ENTERPRISE-IV EISA VLB
|
Processor |
80486SX/80487SX/80486DX/ODP486SX/80486DX2/Pentium Overdrive |
|
Processor Speed |
25/33/50(internal)/50/66(internal)MHz |
|
Chip Set |
AMI |
|
Max. Onboard DRAM |
256MB |
|
Cache |
256KB |
|
BIOS |
AMI |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
32-bit VESA local bus slots (2), floppy drive interface, IDE interface, parallel port, serial ports (2) |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Serial port 1 |
J2 |
Power LED & keylock |
J34 |
|
Serial port 2 |
J3 |
Turbo switch |
J39 |
|
Parallel port |
J4 |
Speaker |
J40 |
|
IDE interface LED |
J5 |
Reset switch |
J41 |
|
Floppy drive interface |
J6 |
Turbo LED |
J42 |
|
IDE interface |
J9 |
32-bit VESA Local bus slot |
S1 |
|
PS/2 mouse |
J11 |
32-bit VESA Local bus slot |
S2 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper/Switch |
Position | |
|
» |
Factory configured - do not alter |
J10 |
N/A |
|
» |
Factory configured - do not alter |
J21 |
N/A |
|
» |
CPU low priority |
J31 |
pins 1 & 2 closed |
|
CPU high priority |
J31 |
pins 2 & 3 closed | |
|
» |
Factory configured - do not alter |
J38 |
N/A |
|
» |
Factory configured - do not alter |
SW1/switch 1 |
Off |
|
» |
Monitor type select monochrome |
SW1/switch 2 |
Off |
|
Monitor type select color |
SW1/switch 2 |
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 |
|
4MB |
(1) 1M x 36 |
None |
None |
None |
|
6MB |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 1M x 36 |
None |
|
8MB |
(1) 1M x 36 |
(1) 1M x 36 |
None |
None |
|
10MB |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
|
12MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
None |
|
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 |
|
18MB |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 4M x 36 |
None |
|
20MB |
(1) 1M x 36 |
(1) 4M x 36 |
None |
None |
|
24MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 4M x 36 |
None |
|
32MB |
(1) 4M x 36 |
(1) 4M x 36 |
None |
None |
|
36MB |
(1) 1M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
None |
|
40MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
|
48MB |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
None |
|
64MB |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
|
64MB |
(1) 16M x 36 |
None |
None |
None |
|
128MB |
(1) 16M x 36 |
(1) 16M x 36 |
None |
None |
|
192MB |
(1) 16M x 36 |
(1) 16M x 36 |
(1) 16M x 36 |
None |
|
256MB |
(1) 16M x 36 |
(1) 16M x 36 |
(1) 16M x 36 |
(1) 16M x 36 |
|
CPU SPEED CONFIGURATION | |||
|
Speed |
J12 |
J13 |
J14 |
|
25MHz |
Open |
Open |
Open |
|
33MHz |
Open |
Closed |
Open |
|
50i MHz |
Open |
Open |
Open |
|
50MHz |
Closed |
Open |
Closed |
|
66i MHz |
Open |
Closed |
Open |
|
CPU TYPE CONFIGURATION | ||||
|
PGA CPU |
PQFP CPU |
J15 |
J16 |
J43 |
|
None |
80486SX,80486DX |
N/A |
N/A |
Open |
|
ODP486SX, 80487SX, ODP586SX |
80486SX,80486DX |
1&2, 3&4 |
pins 2 & 3 |
Closed |
|
ODP486SX, 80487SX, ODP586SX |
None |
1&2, 3&4 |
pins 2 & 3 |
N/A |
|
80486DX, 80486DX2 |
None |
1&2, 3&4 |
pins 1 & 2 |
N/A |
|
80486DX, 80486DX2 |
80486SX,80486DX |
1&2, 3&4 |
pins 1 & 2 |
Closed |
|
80486SX |
None |
pins 2 & 3 |
N/A |
N/A |
|
80486SX |
80486SX,80486DX |
pins 2 & 3 |
N/A |
Closed |
|
Note:Pins designated should be in the closed position. | ||||
|
SERIAL PORT INTERRUPT SELECTION | ||||
|
Port 1 (J2) |
Port 2 (J3) |
J22 |
J23 | |
| » |
IRQ4 |
IRQ3 |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
IRQ3 |
IRQ4 |
pins 1 & 2 closed |
pins 2 & 3 closed | |