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# TMC RESEARCH CORPORATION
PAT48PM
Processor 80486SX/80487SX/80486DX/ODP486SX/80486DX2
Processor Speed 20/25/33/40(internal)/50/66(internal)MHz
Chip Set OPTI
Max. Onboard DRAM 32MB
Cache 64/128/256KB
BIOS AMI
Dimensions 330mm x 218mm
I/O Options None
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|--------------+-----------+--------------------+------------|
| Speaker | J1 pins 1 | IDE LED in | J1 pins 10 |
| | - 4 | | & 20 |
|--------------+-----------+--------------------+------------|
| Turbo switch | J1 pins 7 | Power LED & | J1 pins 11 |
| | & 17 | keylock | - 15 |
|--------------+-----------+--------------------+------------|
| Turbo LED | J1 pins 8 | IDE LED out | J2 |
| | & 18 | | |
|--------------+-----------+--------------------+------------|
| Reset switch | J1 pins 9 | External battery | J4 |
| | & 19 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 J4) | | |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | JP1 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Bus speed select CLKIN/4 | JP2 | Open |
|---+----------------------------------+--------+------------|
| | Bus speed select CLKIN/6 | JP2 | Closed |
|---+----------------------------------+--------+------------|
| » | Monitor type select color | JP3 | Closed |
|---+----------------------------------+--------+------------|
| | Monitor type select monochrome | JP3 | Open |
|---+----------------------------------+--------+------------|
| » | CPU speed (CLKIN) select iOSC/1 | JP4 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | CPU speed (CLKIN) select iOSC/2 | JP4 | pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |
|------------------+--------------------+--------------------|
| 20MB | (4) 4M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG | TAG | Resistor |
| | | | (U41) | (U42) | Installed |
|-------+---------+--------+---------+---------+-------------|
| 64KB | (4) 8K | (4) 8K | (1) 8K | (1) 4K | RND |
| | x 8 | x 8 | x 8 | x 1 | |
|-------+---------+--------+---------+---------+-------------|
| 64KB | (4) 8K | (4) 8K | (1) 8K | (1) 16K | RND |
| | x 8 | x 8 | x 8 | x 1 | |
|-------+---------+--------+---------+---------+-------------|
| 64KB | (4) 8K | (4) 8K | (1) 8K | (1) 64K | RND |
| | x 8 | x 8 | x 8 | x 1 | |
|-------+---------+--------+---------+---------+-------------|
| 128KB | (4) 32K | NONE | (1) 8K | (1) 16K | RNE |
| | x 8 | | x 8 | x 1 | |
|-------+---------+--------+---------+---------+-------------|
| 128KB | (4) 32K | NONE | (1) 8K | (1) 64K | RNE |
| | x 8 | | x 8 | x 1 | |
|-------+---------+--------+---------+---------+-------------|
| 256KB | (4) 32K | (4) | (1) 32K | (1) 16K | RNF |
| | x 8 | 32K x | x 8 | x 1 | |
| | | 8 | | | |
|-------+---------+--------+---------+---------+-------------|
| 256KB | (4) 32K | (4) | (1) 32K | (1) 64K | RNF |
| | x 8 | 32K x | x 8 | x 1 | |
| | | 8 | | | |
|------------------------------------------------------------|
| Notes: If DRAM is £ 16MB, all cache sizes may be |
| installed; if DRAM is >16MB, 128 or 256KB cache must be |
| installed. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | RNA | RNB | RNC |
|-----------+----------------+---------------+---------------|
| 80486SX | Not installed | Not installed | Installed |
|-----------+----------------+---------------+---------------|
| 80487SX | Not installed | Installed | Not installed |
|-----------+----------------+---------------+---------------|
| ODP486SX | Not installed | Installed | Not installed |
|-----------+----------------+---------------+---------------|
| 80486DX | Installed | Not installed | Not installed |
|-----------+----------------+---------------+---------------|
| 80486DX2 | Installed | Not installed | Not installed |
+------------------------------------------------------------+