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--- a2232 [2018/08/25 16:04] – wiki_admin
+++ a2232 [2018/08/30 22:24] – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
-====== Commodore A2232 Serial Expansion Board ======
+**Commodore A2232 Serial Expansion Board**
 The A2232 Multiport Serial Card is a standard 100-pin Zorro II expansion card for the Amiga (A2000, A3000, A4000). It provides the Amiga with 7 additional standard RS232 serial ports, capable of speeds from 50-19200 bps. For more serial channels, additional A2232 boards can be plugged into the system at the same time (up to five boards giving a total of 36 serial ports).
@@ Line 18: / Line 18: @@
 Up to 57600 on all ports using a custom device and hardware modification: http://aminet.net/package/docs/hard/a2232tuning
-Several sites also refer to mods for up to 115200 bps speeds (on all ports? Link?). Amiga.resource.cx also has a photo of a board with a title "Rev 6 board with RTS/CTS handshake mod". Another modification is to replace the 1.84 Mhz oscillator with a 3.68 Mhz one. This doubles the baud rates but the software won't know about this so the user must keep this in mind when using the board.
+Several sites also refer to mods for up to 115200 bps speeds (on all ports? Link?).
-==== Connectors, pinouts and cables ====
+Amiga.resource.cx also has a photo of a board with a title "Rev 6 board with RTS/CTS handshake mod". Another modification is to replace the 1.84 Mhz oscillator with a 3.68 Mhz one. This doubles the baud rates but the software won't know about this so the user must keep this in mind when using the board.
+===== Connectors, pinouts and cables =====
 The connector nearest to the Zorro connector of the board (leftmost) is the first serial port.
@@ Line 80: / Line 82: @@
 //
-==== Usage ====
+===== Using the serial ports =====
+==== Workbench ====
 In Workbench the ports can be accessed using the serial.device driver (ver 33.11 from 1990 and newer, install disk available at Amiga.resource.cx) with the following unit numbers:
-Unit 0 -> default port (set in Prefs serial panel)
+<table label>
-Unit 1 -> Amiga's built-in port
+<caption>Unit numbers in AmigaOS</caption>
-Unit 2 -> A2232's port 1
+|Unit 0|default port (set in Workbench's Prefs / Serial panel|
-Unit 3 -> A2232's port 2
+|Unit 1|Amiga's built-in serial port|
-Unit 4 -> A2232's port 3
+|Unit 2|A2232's port 1|
-Unit 5 -> A2232's port 4
+|Unit 3|A2232's port 2|
-Unit 6 -> A2232's port 5
+|Unit 4|A2232's port 3|
-Unit 7 -> A2232's port 6
+|Unit 5|A2232's port 4|
-Unit 8 -> A2232's port 7
+|Unit 6|A2232's port 5|
+|Unit 7|A2232's port 6|
+|Unit 8|A2232's port 7|
+</table>
 If several A2232 boards are installed, the second board's unit numbers are 9-15 and so on. Up to five boards are supported (probably a limitation of the number of Zorro slots in any available machine).
-In Amiga UNIX, the first port of the A2232 is known as /dev/term/ql00, second one ql01 and so on, thrue to ql06.
+==== Amix ====
+In Amiga UNIX, the first port of the A2232 is known as **/dev/term/ql00**, second one ql01 and so on, thrue to ql06.
+Probably the main selling point of the A2232 was the ability to connect several serial terminals to an AMIX machine. To start a login shell at any of the serial ports, use pmadm: **pmadm -e -p serial -s ql00** This enables shell in the first port at the default speed of 9600 bps (defined as the 'serial' preset in /etc/screendefs).
-Probably the main selling point of the A2232 was the ability to connect several serial terminals to an AMIX machine. To start a login shell at any of the serial ports, use pmadm: pmadm -e -p serial -s ql00 This enables shell in the first port at the default speed of 9600 bps (defined as the 'serial' preset in /etc/screendefs). A real vintage dumb terminal (or a modern PC running terminal emulator, or a device like PockeTerm from Briel Computers) can be connected to the port and used to log into the machine.
+A real vintage dumb terminal (or a modern PC running terminal emulator, or a device like PockeTerm from Briel Computers) can be connected to the port and used to log into the machine.
-== Sources: ==
+=== Sources ===
-A2232 System schematics
+  * A2232 System schematics
-http://amiga.resource.cx
+  * http://amiga.resource.cx
-http://www.l8r.net/technical/t-2232.shtml
+  * http://www.l8r.net/technical/t-2232.shtml
-Wikimedia Commons (mini 8-pin DIN diagram)
+  * Wikimedia Commons (mini 8-pin DIN diagram)
-Thanks to mackbw on English Amiga Board for information on the pinouts!
+  * Thanks to mackbw on English Amiga Board for information on the pinouts!