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# ARNET CORPORATION
TWINPORT
Card Type Serial controller
Chipset/Controller Startech
I/O Options Serial ports (2)
Maximum DRAM N/A
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| Serial port 2 | CN1 | Serial port 1 | CN2 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT CONFIGURATION |
|------------------------------------------------------------|
| Port 1 (CN2) | Port 2 (CN1) | S1 | S2 |
|---------------+---------------+----------------+-----------|
| COM1 | COM2 | 1, 2, 3, 5, & | 1 & 2 On |
| | | 6 on | |
|---------------+---------------+----------------+-----------|
| COM1 | Disabled | 1, 2, 3, & 5 | 1 On |
| | | on | |
|---------------+---------------+----------------+-----------|
| Disabled | COM2 | 1, 2, 3, & 6 | 2 On |
| | | on | |
|---------------+---------------+----------------+-----------|
| Disabled | Disabled | All Off | N/A |
|------------------------------------------------------------|
| Note:All switch keys other than those designated as |
| on for a particular configuration should be put in |
| the Off position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| I/O ADDRESS SELECT |
|------------------------------------------------------------|
| Port 1 | Port | Option | S1/1 | S1/2 | S1/3 | S1/7 | S1/8 |
| (CN2) | 2 | | | | | | |
| | (CN1) | | | | | | |
|--------+-------+--------+------+------+------+------+------|
| 100h | 108h | 140h | Off | Off | Off | Off | Off |
|--------+-------+--------+------+------+------+------+------|
| 180h | 188h | 1C0h | Off | Off | On | Off | Off |
|--------+-------+--------+------+------+------+------+------|
| 200h | 208h | 240h | Off | On | Off | Off | Off |
|--------+-------+--------+------+------+------+------+------|
| 200h | 208h | 2D0h | Off | On | On | Off | Off |
|--------+-------+--------+------+------+------+------+------|
| 280h | 288h | 2C0h | On | Off | Off | Off | Off |
|--------+-------+--------+------+------+------+------+------|
| 280h | 288h | 300h | On | Off | On | Off | Off |
|--------+-------+--------+------+------+------+------+------|
| 300h | 308h | 340h | On | On | Off | Off | Off |
|--------+-------+--------+------+------+------+------+------|
| 3F8h | 2F8h | 340h | On | On | On | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| OPTION I/O SPACE CONFIGURATION |
|------------------------------------------------------------|
| Setting | S1/4 |
|-------------------------------+----------------------------|
| Enabled | On |
|-------------------------------+----------------------------|
| Disabled | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| I/O ADDRESS SELECT |
|------------------------------------------------------------|
|Port 1 (CN2)|Port 2 (CN1)|S1/1|S1/2|S1/3|S1/4|S1/5|S1/6|S1/7|
|------------+------------+----+----+----+----+----+----+----|
| IRQ4 | IRQ3 | On | On |Off |Off |Off |Off |Off |
|------------+------------+----+----+----+----+----+----+----|
| IRQ2 | IRQ2 |Off |Off | On |Off |Off |Off |Off |
|------------+------------+----+----+----+----+----+----+----|
| IRQ3 | IRQ3 |Off |Off |Off | On |Off |Off |Off |
|------------+------------+----+----+----+----+----+----+----|
| IRQ4 | IRQ4 |Off |Off |Off |Off | On |Off |Off |
|------------+------------+----+----+----+----+----+----+----|
| IRQ5 | IRQ5 |Off |Off |Off |Off |Off | On |Off |
|------------+------------+----+----+----+----+----+----+----|
| IRQ7 | IRQ7 |Off |Off |Off |Off |Off |Off | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FORMULA IV OPERATING SYSTEM SETTINGS |
|------------------------------------------------------------|
| UART | Option I/O | IRQ | S1 | S2 |
| Address | Address | | | |
|------------+----------------+---------+----------+---------|
| 280h | N/A | IRQ2 | 1, 5 & 6 | 3 on |
| | | | on | |
|------------------------------------------------------------|
| Note:All switch keys other than those designated as |
| on for a particular configuration should be put in |
| the Off position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MBOS/5, BOS/LAN OPERATING SYSTEM SETTINGS |
|------------------------------------------------------------|
| UART Address | Option I/O | IRQ | S1 | S2 |
| | Address | | | |
|-----------------+---------------+--------+---------+-------|
| » | 100h | N/A | IRQ2 | 5 & 6 | 3 on |
| | | | | on | |
|------+----------+---------------+--------+---------+-------|
| | 200h | N/A | IRQ2 | 2, 5 & | 3 on |
| | | | | 6 on | |
|------------------------------------------------------------|
| Note:All switch keys other than those designated as |
| on for a particular configuration should be put in |
| the Off position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MUC-DOS OPERATING SYSTEM SETTINGS |
|------------------------------------------------------------|
| UART Address | Option I/O | IRQ | S1 | S2 |
| | Address | | | |
|-----------------+---------------+--------+---------+-------|
| » | 100h | 140h | IRQ7 | 4, 5 & | 7 on |
| | | | | 6 on | |
|------+----------+---------------+--------+---------+-------|
| | 200h | 240h | IRQ7 | 2, 4, 5 | 7 on |
| | | | | & 6 on | |
|------------------------------------------------------------|
| Note:All switch keys other than those designated as |
| on for a particular configuration should be put in |
| the Off position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MUMPS/CCSM MUMPS OPERATING SYSTEM SETTINGS |
|------------------------------------------------------------|
| UART Address | Option I/O | IRQ | S1 | S2 |
| | Address | | | |
|-----------------+---------------+--------+---------+-------|
| » | 280h | 2C0h | IRQ3 | 1, 4, 5 | 4 on |
| | | | | & 6 on | |
|------+----------+---------------+--------+---------+-------|
| | 200h | 2D0h | IRQ3 | 2, 3, | 4 on |
| | | | | 4, 5 & | |
| | | | | 6 on | |
|------------------------------------------------------------|
| Note:All switch keys other than those designated as |
| on for a particular configuration should be put in |
| the Off position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PICK OPERATING SYSTEM SETTINGS |
|------------------------------------------------------------|
| UART | Option I/O | IRQ | S1 | S2 |
| Address | Address | | | |
|------------+----------------+---------+-----------+--------|
| 280h | 2C0h | IRQ4 | 1, 4, 5 | 5 on |
| | | | and 6 on | |
|------------+----------------+---------+-----------+--------|
| 180h | 1C0h | IRQ3 | 3, 4, 5 | 4 on |
| | | | and 6 on | |
|------------------------------------------------------------|
| Note:All switch keys other than those designated as |
| on for a particular configuration should be put in |
| the Off position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| QNX OPERATING SYSTEM SETTINGS |
|------------------------------------------------------------|
| UART | Option I/O | IRQ | S1 | S2 |
| Address | Address | | | |
|------------+----------------+---------+----------+---------|
| 280h | N/A | IRQ2 | 1, 5 & 6 | 3 on |
| | | | on | |
|------------+----------------+---------+----------+---------|
| 280h | N/A | IRQ3 | 1, 5 & 6 | 4 on |
| | | | on | |
|------------+----------------+---------+----------+---------|
| 280h | N/A | IRQ4 | 1, 5 & 6 | 5 on |
| | | | on | |
|------------+----------------+---------+----------+---------|
| 280h | N/A | IRQ5 | 1, 5 & 6 | 6 on |
| | | | on | |
|------------------------------------------------------------|
| Note:All switch keys other than those designated as |
| on for a particular configuration should be put in |
| the Off position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| THEOS OPERATING SYSTEM SETTINGS |
|------------------------------------------------------------|
| UART | Option I/O | IRQ | System | S1 | S2 |
| Address | Address | | Type | | |
|-----------+---------------+-------+--------+-------+-------|
| 280h | 2C0h | IRQ5 | AT | 1, 4, | 6 on |
| | | | | 5 & 6 | |
| | | | | on | |
|-----------+---------------+-------+--------+-------+-------|
| 280h | 2C0h | IRQ4 | XT | 1, 4, | 5 on |
| | | | | 5 & 6 | |
| | | | | on | |
|------------------------------------------------------------|
| Note:All switch keys other than those designated as |
| on for a particular configuration should be put in |
| the Off position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VENIX/86 OPERATING SYSTEM SETTINGS |
|------------------------------------------------------------|
| UART | Option I/O | IRQ | S1 | S2 |
| Address | Address | | | |
|------------+----------------+---------+----------+---------|
| 280h | N/A | IRQ3 | 1, 5 & 6 | 4 on |
| | | | on | |
|------------+----------------+---------+----------+---------|
| 280h | N/A | IRQ4 | 1, 5 & 6 | 5 on |
| | | | on | |
|------------------------------------------------------------|
| Note:All switch keys other than those designated as |
| on for a particular configuration should be put in |
| the Off position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| XENIX SYSTEM V OPERATING SYSTEM SETTINGS |
|------------------------------------------------------------|
| UART Address | Option I/O | IRQ | Port | S1 | S2 |
| | Address | | | | |
|--------------+-------------+------+-------+--------+-------|
| » | 100h | 140h | IRQ4 | COM1 | 4, 5, | 5 on |
| | | | | | & 6 on | |
|-----+--------+-------------+------+-------+--------+-------|
| | 280h | 2C0h | IRQ4 | COM1 | 1, 4, | 5 on |
| | | | | | 5, & 6 | |
| | | | | | on | |
|-----+--------+-------------+------+-------+--------+-------|
| » | 180h | 1C0h | IRQ3 | COM2 | 3, 4, | 4 on |
| | | | | | 5, & 6 | |
| | | | | | on | |
|-----+--------+-------------+------+-------+--------+-------|
| | 300h | 340h | IRQ3 | COM2 | 1, 2, | 4 on |
| | | | | | 4, 5, | |
| | | | | | & 6 on | |
|------------------------------------------------------------|
| Note:All switch keys other than those designated as |
| on for a particular configuration should be put in |
| the Off position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| XMM-DOS OPERATING SYSTEM SETTINGS |
|------------------------------------------------------------|
| UART Address | Option I/O | IRQ | S1 | S2 |
| | Address | | | |
|-----------------+---------------+--------+---------+-------|
| » | 100h | 140h | IRQ2 | 4, 5, & | 3 on |
| | | | | 6 on | |
|------+----------+---------------+--------+---------+-------|
| | 180h | 1C0h | IRQ7 | 3, 4, | 7 on |
| | | | | 5, & 6 | |
| | | | | on | |
|------------------------------------------------------------|
| Note:All switch keys other than those designated as |
| on for a particular configuration should be put in |
| the Off position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PC-MOS/386 OPERATING SYSTEM SETTINGS |
|------------------------------------------------------------|
| UART Address | Option I/O | IRQ | S1 | S2 |
| | Address | | | |
|-----------------+---------------+--------+---------+-------|
| » | 280h | N/A | IRQ2 | 1, 5 & | 3 on |
| | | | | 6 on | |
|------+----------+---------------+--------+---------+-------|
| | 100h | N/A | IRQ2 | 5 & 6 | 3 on |
| | | | | on | |
|------------------------------------------------------------|
| Note:All switch keys other than those designated as |
| on for a particular configuration should be put in |
| the Off position. |
+------------------------------------------------------------+