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# ACER, INC.
KMC-40A 486DLC/386DX
Processor 80386DX/CX486DLC
Processor Speed 33/40MHz
Chip Set ALI
Max. Onboard DRAM 32MB
SRAM Cache 32/64/128/256KB
BIOS AMI
Dimensions 240mm x 220mm
I/O Options None
NPU Options 80387/CX83D87/3167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+------------------+-----------|
| External battery | J4 | Turbo switch | J7 pins 1 |
| | | | & 2 |
|------------------+----------+------------------+-----------|
| Reset switch | J5 | Turbo LED | J7 pins 4 |
| | | | & 5 |
|------------------+----------+------------------+-----------|
| Speaker | J6 | Power LED & | J8 |
| | | keylock | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Monitor type select color | JP1 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Monitor type select monochrome | JP1 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP2 | pins 2 & 3 |
| | alter | | closed |
|---+----------------------------------+--------+------------|
| » | RTC type select DS1287 | JP3 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | RTC type select 146818 | JP3 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP7 | pins 1 & 2 |
| | alter | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP8 | pins 2 & 3 |
| | alter | | closed |
|------------------------------------------------------------|
| Note:The locations of JP7 and JP8 are unknown. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|-----------+------------------------+-----------------------|
| 1MB | (4) 256K x 9 | NONE |
|-----------+------------------------+-----------------------|
| 2MB | (4) 256K x 9 | (4) 256K x 9 |
|-----------+------------------------+-----------------------|
| 4MB | (4) 1M x 9 | NONE |
|-----------+------------------------+-----------------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 |
|-----------+------------------------+-----------------------|
| 16MB | (4) 4M x 9 | NONE |
|-----------+------------------------+-----------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP5 | JP6 |
|-------+--------------------------------+-------------------|
| 32KB | open | pins 2 & 3 closed |
|-------+--------------------------------+-------------------|
| 64KB | open | pins 1 & 2 closed |
|-------+--------------------------------+-------------------|
| 128KB | pins 1 & 2, 3 & 4 and 5 & 6 | pins 2 & 3 closed |
| | closed | |
|-------+--------------------------------+-------------------|
| 256KB | pins 1 & 2, 3 & 4 and 5 & 6 | pins 1 & 2 closed |
| | closed | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Cache SRAM | Location | TAG |
|------------+---------------+---------------+---------------|
| 32KB | (4) 8K x 8 | Bank 0 | (1) 8K x 8 |
|------------+---------------+---------------+---------------|
| 64KB | (8) 8K x 8 | Banks 0 & 1 | (1) 8K x 8 |
|------------+---------------+---------------+---------------|
| 128KB | (4) 32K x 8 | Bank 0 | (1) 32K x 8 |
|------------+---------------+---------------+---------------|
| 256KB | (8) 32K x 8 | Banks 0 & 1 | (1) 32K x 8 |
+------------------------------------------------------------+