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# TMC RESEARCH CORPORATION
IAT48PX
Processor 80486SX/80487SX/80486DX/ODP486SX/80486DX2
Processor 20/25/33/50 (Internal)/50/60 (Internal)MHz
Speed
Chip Set OPTI
Max. onboard 32MB
DRAM
SRAM Cache 64/128/256KB
BIOS AMI
Dimensions 330mm x 218mm
I/O Options Floppy drive interface, floppy drive interface,
parallel ports (2), serial ports (2)
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| Speaker | J1A | Serial port | J6 |
| | | (COM1) DB-9 | |
|-------------------+----------+------------------+----------|
| Power LED & | J1B | Parallel port | J7 |
| keylock | | DP-9 | |
|-------------------+----------+------------------+----------|
| Not used | J1C | 10-pin header | J8 |
| | | serial port | |
| | | (COM2) | |
|-------------------+----------+------------------+----------|
| Turbo switch | J1D | 10-pin header | J9 |
| | | serial port | |
| | | (COM1) | |
|-------------------+----------+------------------+----------|
| Turbo LED | J1E | Parallel port | J10 |
| | | 10-pin header | |
|-------------------+----------+------------------+----------|
| Reset switch | J1F | No function | J17 |
|-------------------+----------+------------------+----------|
| IDE interface LED | J1G, J2 | Floppy drive | J18 |
| | | interface | |
|-------------------+----------+------------------+----------|
| External battery | J4 | IDE interface | J19 |
|-------------------+----------+------------------+----------|
| Serial port | J5 | 16-bit riser | S1 |
| (COM2) DB-9 | | card | |
|------------------------------------------------------------|
| Note: Depending on the specifications, the IAT48PX will |
| have either 10-pin header serial ports or the DB-9 |
| serial ports. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 | JP2 | Closed |
|---+-------------------------------+-----------+------------|
| | Monitor type select | JP2 | Open |
| | monochrome | | |
|---+-------------------------------+-----------+------------|
| » | Floppy drive interface (J18) | JP3 | Closed |
| | enabled | | |
|---+-------------------------------+-----------+------------|
| | Floppy drive interface (J18) | JP3 | Open |
| | disabled | | |
|---+-------------------------------+-----------+------------|
| » | IDE interface enabled | JP4 & JP5 | Closed |
|---+-------------------------------+-----------+------------|
| | IDE interface disabled | JP4 & JP5 | Open |
|---+-------------------------------+-----------+------------|
| » | I/O bus speed select ATCLK/4 | JP6 | Open |
|---+-------------------------------+-----------+------------|
| | I/O bus speed select ATCLK/6 | JP6 | Closed |
|---+-------------------------------+-----------+------------|
| » | CPU clock select single | JP7 | pins 1 & 2 |
| | frequency | | closed |
|---+-------------------------------+-----------+------------|
| | CPU speed select dual | JP7 | pins 2 & 3 |
| | frequency | | 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) 1M x 9 | (4) 256K 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 | U45 | U44 (TAG) |
|-------+-------------+------------+------------+------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 | (1) 4K x 4 |
|-------+-------------+------------+------------+------------|
| 128KB | (4) 32K x 8 | None | (1) 8K x 8 | (1) 4K x 4 |
|-------+-------------+------------+------------+------------|
| 256KB | (4) 32K x 8 | (4) 32K x | (1) 8K x 8 | (1) 4K x 4 |
| | | 8 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE RN SOCKET CONFIGURATION |
|------------------------------------------------------------|
| Size | RND | RNE | RNF |
|------------+---------------+---------------+---------------|
| 64KB | Installed | Not installed | Not installed |
|------------+---------------+---------------+---------------|
| 128KB | Not installed | Installed | Not installed |
|------------+---------------+---------------+---------------|
| 256KB | Not installed | Not installed | Installed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT CONFIGURATION |
|------------------------------------------------------------|
| COM1 | COM2 | RNH |
|-----------------+------------+-----------------------------|
| » | COM1 | COM2 | Installed on 1, 2, 3, and 4 |
|---+-------------+------------+-----------------------------|
| | COM1 | Disabled | Installed on 2, 3, 4, and 5 |
|---+-------------+------------+-----------------------------|
| | Disabled | COM2 | Installed on 3, 4, 5, and 6 |
|---+-------------+------------+-----------------------------|
| | Disabled | Disabled | Installed on 4, 5, 6, and 7 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PARALLEL PORT CONFIGURATION |
|------------------------------------------------------------|
| LPT | Address | RNG |
|---------------+--------------+-----------------------------|
| » | 1 | 3BCh - 3BEh | Installed on 2, 3, 4, and 5 |
|---+-----------+--------------+-----------------------------|
| | 2 | 378h - 37Fh | Installed on 1, 2, 3, and 4 |
|---+-----------+--------------+-----------------------------|
| | Disabled | N/A | Installed on 4, 5, 6, and 7 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | RNA | RNB | RNC |
|------------+---------------+---------------+---------------|
| 80486SX | Not installed | Not installed | Installed |
|------------+---------------+---------------+---------------|
| 80487SX | Not installed | Installed | Not installed |
|------------+---------------+---------------+---------------|
| 80486DX | Installed | Not installed | Not installed |
|------------+---------------+---------------+---------------|
| ODP486SX | Not installed | Installed | Not installed |
|------------+---------------+---------------+---------------|
| 80486DX2 | Installed | Not installed | Not installed |
+------------------------------------------------------------+