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# TMC RESEARCH CORPORATION
PAT48PR
Processor 80486SX/80487SX/80486DX/ODP486SX/80486DX2
Processor Speed 25/33/50(internal)/50/66(internal)MHz
Chip Set OPTI
Max. Onboard DRAM 64MB
SRAM Cache 64/128/256KB
BIOS AMI
Dimensions 220mm x 240mm
I/O Options 32-bit VESA local bus slot (2)
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|--------------+-------------+------------------+------------|
| Speaker | J1/pins 1-4 | IDE interface | J1 pins 10 |
| | | LED | & 20 |
|--------------+-------------+------------------+------------|
| Turbo switch | J1/pins 7 & | IDE interface | J2 |
| | 17 | LED | |
|--------------+-------------+------------------+------------|
| Turbo LED | J1/pins 8 & | External battery | J4 |
| | 18 | | |
|--------------+-------------+------------------+------------|
| Reset switch | J1/pins 9 & | 32-bit VESA | S1 & S2 |
| | 19 | local bus card | |
| | | (2) | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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) | | |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | JP1 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Monitor type select color | JP4 | closed |
|---+----------------------------------+--------+------------|
| | Monitor type select monochrome | JP4 | open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 | RNB1 & | RNC1 & |
| | | | | | RNB2 | |
| | | | | | | RNC2 |
|------+--------+--------+--------+--------+--------+--------|
| 1MB | (4) | NONE | NONE | NONE | open | closed |
| | 256K x | | | | | |
| | 9 | | | | | |
|------+--------+--------+--------+--------+--------+--------|
| 2MB | (4) | (4) | NONE | NONE | open | closed |
| | 256K x | 256K x | | | | |
| | 9 | 9 | | | | |
|------+--------+--------+--------+--------+--------+--------|
| 4MB | (4) 1M | NONE | NONE | NONE | open | closed |
| | x 9 | | | | | |
|------+--------+--------+--------+--------+--------+--------|
| 4MB | NONE | NONE | (1) 1M | NONE | closed | open |
| | | | x 36 | | | |
|------+--------+--------+--------+--------+--------+--------|
| 5MB | (4) 1M | (4) | NONE | NONE | open | closed |
| | x 9 | 256K x | | | | |
| | | 9 | | | | |
|------+--------+--------+--------+--------+--------+--------|
| 6MB | (4) | (4) | (1) 1M | NONE | open | closed |
| | 256K x | 256K x | x 36 | | | |
| | 9 | 9 | | | | |
|------+--------+--------+--------+--------+--------+--------|
| 8MB | (4) 1M | (4) 1M | NONE | NONE | open | closed |
| | x 9 | x 9 | | | | |
|------+--------+--------+--------+--------+--------+--------|
| 8MB | NONE | NONE | (1) 1M | (1) 1M | closed | open |
| | | | x 36 | x 36 | | |
|------+--------+--------+--------+--------+--------+--------|
| 9MB | (4) | (4) 1M | (1) 1M | NONE | open | closed |
| | 256K x | x 9 | x 36 | | | |
| | 9 | | | | | |
|------+--------+--------+--------+--------+--------+--------|
| 10MB | (4) | (4) | (1) 1M | (1) 1M | open | closed |
| | 256K x | 256K x | x 36 | x 36 | | |
| | 9 | 9 | | | | |
|------+--------+--------+--------+--------+--------+--------|
| 12MB | (4) 1M | (4) 1M | (1) 1M | NONE | open | closed |
| | x 9 | x 9 | x 36 | | | |
|------+--------+--------+--------+--------+--------+--------|
| 13MB | (4) | (4) 1M | (1) 1M | (1) 1M | open | closed |
| | 256K x | x 9 | x 36 | x 36 | | |
| | 9 | | | | | |
|------+--------+--------+--------+--------+--------+--------|
| 16MB | (4) 1M | (4) 1M | (1) 1M | (1) 1M | open | closed |
| | x 9 | x 9 | x 36 | x 36 | | |
|------+--------+--------+--------+--------+--------+--------|
| 16MB | (4) 4M | NONE | NONE | NONE | open | closed |
| | x 9 | | | | | |
|------+--------+--------+--------+--------+--------+--------|
| 16MB | NONE | NONE | (1) 4M | NONE | closed | open |
| | | | x 36 | | | |
|------+--------+--------+--------+--------+--------+--------|
| 20MB | (4) 4M | (4) 1M | NONE | NONE | open | closed |
| | x 9 | x 9 | | | | |
|------+--------+--------+--------+--------+--------+--------|
| 20MB | NONE | NONE | (1) 4M | (1) 1M | closed | open |
| | | | x 36 | x 36 | | |
|------+--------+--------+--------+--------+--------+--------|
| 24MB | (4) 4M | (4) 1M | (1) 1M | NONE | open | closed |
| | x 9 | x 9 | x 36 | | | |
|------+--------+--------+--------+--------+--------+--------|
| 28MB | (4) 4M | (4) 1M | (1) 1M | (1) 1M | open | closed |
| | x 9 | x 9 | x 36 | x 36 | | |
|------+--------+--------+--------+--------+--------+--------|
| 32MB | (4) 4M | (4) 4M | NONE | NONE | open | closed |
| | x 9 | x 9 | | | | |
|------+--------+--------+--------+--------+--------+--------|
| 32MB | NONE | NONE | (1) 4M | (1) 4M | closed | open |
| | | | x 36 | x 36 | | |
|------+--------+--------+--------+--------+--------+--------|
| 36MB | (4) 4M | (4) 4M | (1) 1M | NONE | open | closed |
| | x 9 | x 9 | x 36 | | | |
|------+--------+--------+--------+--------+--------+--------|
| 40MB | (4) 4M | (4) 4M | (1) 1M | (1) 1M | open | closed |
| | x 9 | x 9 | x 36 | x 36 | | |
|------+--------+--------+--------+--------+--------+--------|
| 48MB | (4) 4M | (4) 4M | (1) 4M | NONE | open | closed |
| | x 9 | x 9 | x 36 | | | |
|------+--------+--------+--------+--------+--------+--------|
| 52MB | (4) 4M | (4) 4M | (1) 4M | (1) 1M | open | closed |
| | x 9 | x 9 | x 36 | x 36 | | |
|------+--------+--------+--------+--------+--------+--------|
| 52MB | (4) 4M | (4) 1M | (1) 4M | (1) 4M | open | closed |
| | x 9 | x 9 | x 36 | x 36 | | |
|------+--------+--------+--------+--------+--------+--------|
| 64MB | (4) 4M | (4) 4M | (1) 4M | (1) 4M | open | closed |
| | x 9 | x 9 | x 36 | x 36 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Cache | Location | TAG(U43) | TAG(U44) |
|-------+-------------+------------+------------+------------|
| 64KB | (8) 8K x 8 | Banks 0 & | (1) 8K x 8 | (1) 64K x |
| | | 1 | | 1 |
|-------+-------------+------------+------------+------------|
| 128KB | (4) 32K x 8 | Bank 0 | (1) 8K x 8 | (1) 64K x |
| | | | | 1 |
|-------+-------------+------------+------------+------------|
| 256KB | (8) 32K x 8 | Banks 0 & | (1) 32K x | (1) 64K x |
| | | 1 | 8 | 1 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SRAM RESISTOR CONFIGURATION |
|------------------------------------------------------------|
| Size | RND | RNE | RNF |
|--------------+---------------+--------------+--------------|
| 64KB | closed | open | open |
|--------------+---------------+--------------+--------------|
| 128KB | open | closed | open |
|--------------+---------------+--------------+--------------|
| 256KB | open | open | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU JUMPER CONFIGURATION |
|------------------------------------------------------------|
| CPU | RNA3 | RNB3 | RNC3 |
|---------------+--------------+--------------+--------------|
| 80486DX2 | closed | open | open |
|---------------+--------------+--------------+--------------|
| ODP486SX | open | closed | open |
|---------------+--------------+--------------+--------------|
| 80486DX | closed | open | open |
|---------------+--------------+--------------+--------------|
| 80487SX | open | closed | open |
|---------------+--------------+--------------+--------------|
| 80486SX | open | open | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VESA CARDS SUPPORTED JUMPER CONFIGURATION |
|------------------------------------------------------------|
| # of VESA | W21 | W22 | W23 |
| cards | | | |
|--------------+---------------+-------------+---------------|
| 2 | closed | closed | pins 1 & 2 |
| | | | closed |
|--------------+-----------------------------+---------------|
| 1 | W21/pin 1 connected to | pins 2 & 3 |
| | W22/pin1 | closed |
|------------------------------------------------------------|
| Note: The manufacturer recommends that only one VESA card |
| be used with a 486DX-50MHz. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED JUMPER CONFIGURATION |
|------------------------------------------------------------|
| CPU | JP2 | JP3 | JP5 & | W13 |W14 | W15 | W16 |
| | | | JP6 | | | | |
|-------+-----------+-------+-------+-----+----+------+------|
| 25MHz |pins 2 & 3 |pins 1 | open |open |open|closed| open |
| | | & 2 | | | | | |
|-------+-----------+-------+-------+-----+----+------+------|
| 33MHz |pins 2 & 3 |pins 1 | open |open |open| open |closed|
| | | & 2 | | | | | |
|-------+-----------+-------+-------+-----+----+------+------|
|50iMHz |pins 2 & 3 |pins 1 | open |open |open|closed| open |
| | | & 2 | | | | | |
|-------+-----------+-------+-------+-----+----+------+------|
| 50MHz |pins 1 & 2 |pins 2 |closed |open |open|closed| open |
| | | & 3 | | | | | |
|-------+-----------+-------+-------+-----+----+------+------|
|66iMHz |pins 2 & 3 |pins 1 | open |open |open| open |closed|
| | | & 2 | | | | | |
|------------------------------------------------------------|
|Note:W13 - W16 need only be configured if a 20-pin clock |
|generator is installed in U29. |
| |
|JP3 is AT bus clock select. |
| |
|JP5 and JP6 are VESA bus clock select. |
| |
|Pins designated are in the closed position. |
+------------------------------------------------------------+