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# RELIALOGIC CORPORATION PRIVATE, LTD.
R486 SX25MBC, R486 DX33MBC, R486 DX50MBC, R486 DX2-50MBC, R486
DX2-66MBC
Processor 80486SX/80487SX/80486DX/80486DX2
Processor Speed 25/33/50(internal)/66(internal)MHz
Chip Set UMC
Max. Onboard DRAM 32MB
Cache 64/128/256KB
BIOS AMI
Dimensions 330mm x 218mm
I/O Options None
NPU Options 4167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| Power LED & | J1 | Reset switch | J4 |
| keylock | | | |
|-------------------+----------+------------------+----------|
| Speaker | J2 | Turbo LED | J5 |
|-------------------+----------+------------------+----------|
| Turbo switch | J3 | External battery | J6 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|----------------------------------------+--------+----------|
| » | Battery type select - internal | W22 | Closed |
|---+------------------------------------+--------+----------|
| | Battery type select - external | W22 | Open |
|---+------------------------------------+--------+----------|
| » | Monitor type select | W18 | Open |
| | monochrome/EGA/VGA | | |
|---+------------------------------------+--------+----------|
| | Monitor type select CGA | W18 | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | A | B | C | D |
|------+------------+------------+--------------+------------|
| 1MB | (4) 256K x | NONE | NONE | NONE |
| | 9 | | | |
|------+------------+------------+--------------+------------|
| 2MB | (4) 256K x | (4) 256K x | NONE | NONE |
| | 9 | 9 | | |
|------+------------+------------+--------------+------------|
| 3MB | (4) 256K x | (4) 256K x | (1) 256K x | NONE |
| | 9 | 9 | 36 | |
|------+------------+------------+--------------+------------|
| 4MB | (4) 256K x | (4) 256K x | (1) 256K x | (1) 256K x |
| | 9 | 9 | 36 | 36 |
|------+------------+------------+--------------+------------|
| 4MB | (4) 1M x 9 | NONE | NONE | NONE |
|------+------------+------------+--------------+------------|
| 5MB | (4) 256K x | (4) 1M x 9 | NONE | NONE |
| | 9 | | | |
|------+------------+------------+--------------+------------|
| 6MB | (4) 256K x | (4) 256K x | (1) 1M x 36 | NONE |
| | 9 | 9 | | |
|------+------------+------------+--------------+------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 | NONE | NONE |
|------+------------+------------+--------------+------------|
| 9MB | (4) 256K x | (4) 1M x 9 | (1) 1M x 36 | NONE |
| | 9 | | | |
|------+------------+------------+--------------+------------|
| 10MB | (4) 256K x | (4) 256K x | (1) 1M x 36 | (1) 1M x |
| | 9 | 9 | | 36 |
|------+------------+------------+--------------+------------|
| 12MB | (4) 1M x 9 | (4) 1M x 9 | (1) 1M x 36 | NONE |
|------+------------+------------+--------------+------------|
| 16MB | (4) 1M x 9 | (4) 1M x 9 | (1) 1M x 36 | (4) 1M x 9 |
|------+------------+------------+--------------+------------|
| 16MB | (4) 4M x 9 | NONE | NONE | NONE |
|------+------------+------------+--------------+------------|
| 20MB | (4) 1M x 9 | (4) 4M x 9 | NONE | NONE |
|------+------------+------------+--------------+------------|
| 24MB | (4) 1M x 9 | (4) 4M x 9 | (1) 1M x 36 | NONE |
|------+------------+------------+--------------+------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 | NONE | NONE |
|------+------------+------------+--------------+------------|
| 40MB | (4) 4M x 9 | (4) 4M x 9 | (1) 1M x 36 | (1) 1M x |
| | | | | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Bank | W12 | W13 | W15 | W16 |
|------------------------+--------+--------+--------+--------|
| Bank 0 = A, Bank 1 = | pins 1 | pins 1 | pins 1 | pins 1 |
| B, Bank 2 = C, Bank 3 | & 2 | & 2 | & 2 | & 2 |
| = D | | | | |
|------------------------+--------+--------+--------+--------|
| Bank 0 = C, Bank 1 = | pins 2 | pins 2 | pins 2 | pins 2 |
| D, Bank 2 = A, Bank 3 | & 3 | & 3 | & 3 | & 3 |
| = B | | | | |
|------------------------------------------------------------|
| Note:Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG | U10 (Dirty |
| | | | | Bit) |
|-------+-------------+------------+------------+------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 | (1) 16K x |
| | | | | 4 |
|-------+-------------+------------+------------+------------|
| 128KB | (4) 32K x 8 | NONE | (1) 8K x 8 | (1) 16K x |
| | | | | 4 |
|-------+-------------+------------+------------+------------|
| 256KB | (4) 32K x 8 | (4) 32K x | (1) 32K x | (1) 16K x |
| | | 8 | 8 | 4 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | W2 | W3 | W4 | W5 | W6 | W7 | W8 | W9 |
|------+------+------+-----+-----+------+------+------+------|
| 64KB |1 & 2 |1 & 2 |Open |1 & 2| Open | Open | Open | Open |
|------+------+------+-----+-----+------+------+------+------|
|128KB |2 & 3 |1 & 2 |1 & 2|2 & 3|Closed| Open | Open |Closed|
|------+------+------+-----+-----+------+------+------+------|
|256KB |2 & 3 |2 & 3 |2 & 3|1 & 2|Closed|Closed|Closed|Closed|
|------------------------------------------------------------|
|Note:Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | W10 | W11 |
|------------+--------------------+--------------------------|
| 80486SX | Open | pins 2 & 3 closed |
|------------+--------------------+--------------------------|
| 80487SX | pins 2 & 3 closed | pins 1 & 2, 3 & 4 closed |
|------------+--------------------+--------------------------|
| 80486DX | pins 1 & 2 closed | pins 1 & 2, 3 & 4 closed |
|------------+--------------------+--------------------------|
| 80486DX2 | pins 1 & 2 closed | pins 1 & 2, 3 & 4 closed |
+------------------------------------------------------------+