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# TMC RESEARCH CORPORATION
PAT48PL
Processor 80486SX/80487SX/80486DX/ODP486SX/80486DX2
Processor Speed 16/20/25/33/50(internal)/66(internal)MHz
Chip Set OPTI
Max. Onboard DRAM 32MB
Cache None
BIOS AMI
Dimensions 254mm x 218mm
I/O Options None
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|----------------+------------+----------------+-------------|
| External | J1 | Turbo LED | J6 pins 8 & |
| battery | | | 18 |
|----------------+------------+----------------+-------------|
| IDE LED out | J5 | Reset switch | J6 pins 9 & |
| | | | 19 |
|----------------+------------+----------------+-------------|
| Speaker | J6 pins 1 | IDE LED in | J6 pins 10 |
| | - 4 | | & 20 |
|----------------+------------+----------------+-------------|
| Turbo switch | J6 pins 7 | Power LED & | J6 pins 11 |
| | & 17 | keylock | - 15 |
|------------------------------------------------------------|
| Note:Board may be supplied with a surface mounted 80486SX. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | CMOS memory normal operation | JP1 | pins 2 & 3 |
| | (internal battery) | | closed |
|---+----------------------------------+--------+------------|
| | CMOS memory normal operation | JP1 | Open |
| | (external battery at J1) | | |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | JP1 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Monitor type select color | JP2 | Closed |
|---+----------------------------------+--------+------------|
| | Monitor type select monochrome | JP2 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |
|------------------+--------------------+--------------------|
| 5MB | (4) 256K x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 16MB | (4) 4M x 9 | NONE |
|------------------+--------------------+--------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | RNA | RNB | RNC |
|-----------+----------------+---------------+---------------|
| 80486SX | Not installed | Installed | Not installed |
|-----------+----------------+---------------+---------------|
| 80487SX | Installed | Not installed | Not installed |
|-----------+----------------+---------------+---------------|
| ODP486SX | Installed | Not installed | Not installed |
|-----------+----------------+---------------+---------------|
| 80486DX | Not installed | Not installed | Installed |
|-----------+----------------+---------------+---------------|
| 80486DX2 | Not installed | Not installed | Installed |
|------------------------------------------------------------|
| Note:Although there are two locations for CPUs, only one |
| may be used at a time. |
+------------------------------------------------------------+