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# AMERICAN MEGATRENDS, INC.
BABY EISA
Processor 80486SX/80487SX/80486DX/ODP486SX/80486DX2
Processor Speed 20/25/33/50(internal)/50/66(internal)MHz
Chip Set OPTI
Max. Onboard DRAM 128MB
Cache 64/256KB
BIOS AMI
Dimensions 330mm x 218mm
I/O Options Mouse connector
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------------+----------+----------------+----------|
| Mouse connector | J2 | Speaker | J22 |
|---------------------+----------+----------------+----------|
| Power LED & keylock | J31 | Reset switch | J27 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Switch | Position |
|----------------------------------------+--------+----------|
| » | Factory configured - do not alter | SW1/1 | Off |
|---+------------------------------------+--------+----------|
| » | Monitor type select monochrome | SW1/2 | Off |
|---+------------------------------------+--------+----------|
| | Monitor type select color | SW1/2 | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 4MB | (4) 1M x 9 | NONE |
|------------------+--------------------+--------------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 16MB | (4) 4M x 9 | NONE |
|------------------+--------------------+--------------------|
| 20MB | (4) 1M x 9 | (4) 4M x 9 |
|------------------+--------------------+--------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
|------------------+--------------------+--------------------|
| 64MB | (4) 16M x 9 | NONE |
|------------------+--------------------+--------------------|
| 128MB | (4) 16M x 9 | (4) 16M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 |
|----------------------------+-------------------------------|
| 64KB | (8) 8K x 8 |
|----------------------------+-------------------------------|
| 256KB | (8) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | J14 | J15 | J18 | J19 | J30 |
|---------+----------+----------+---------+---------+--------|
| 64KB | Open | Open | Open | Open | 1 & 2 |
|---------+----------+----------+---------+---------+--------|
| 256KB | Closed | Closed | Closed | Closed | 1 & 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | J9 |
|----------------------------+-------------------------------|
| 80486SX | pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 80486DX | pins 1 & 2, 3 & 4 closed |
|----------------------------+-------------------------------|
| 80486DX2 | pins 1 & 2, 3 & 4 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Jumper | J3 | J6 | J16 | J17 | J30 |
|-----------+--------+----------+---------+---------+--------|
| 20MHz | 1 & 2 | Closed | Open | Open | 2 & 3 |
|-----------+--------+----------+---------+---------+--------|
| 25MHz | 1 & 2 | Open | Open | Open | 1 & 2 |
|-----------+--------+----------+---------+---------+--------|
| 33MHz | 1 & 2 | Open | Open | Closed | 1 & 2 |
|-----------+--------+----------+---------+---------+--------|
| 50iMHz | 1 & 2 | Open | Open | Open | 1 & 2 |
|-----------+--------+----------+---------+---------+--------|
| 50MHz | 2 & 3 | Open | Closed | Closed | 1 & 2 |
|-----------+--------+----------+---------+---------+--------|
| 66iMHz | 1 & 2 | Open | Open | Closed | 1 & 2 |
|------------------------------------------------------------|
| Note : When installing an 80487SX or an ODP486SX use the |
| CPU socket labled CPU-X. Pins designated should be in the |
| closed position. |
+------------------------------------------------------------+