83Plus:Ports:5A - Revision history

Thepenguin77 at 20:37, 7 November 2011

2011-11-07T20:37:38Z

Brandonw at 19:38, 10 December 2010

2010-12-10T19:38:38Z

Brandonw: Created page with '5A - USB Presentation Link Port Mirroring Enable USB Presentation Link Port Mirroring Enable == Synopsis ==…'

2010-12-10T19:36:19Z

Created page with '5A - USB Presentation Link Port Mirroring Enable USB Presentation Link Port Mirroring Enable == Synopsis ==…'

New page

[[Category:83Plus:Ports:By Address|5A - USB Presentation Link Port Mirroring Enable]] [[Category:83Plus:Ports:By Name|USB Presentation Link Port Mirroring Enable]]
== Synopsis ==
'''Port Number:''' 5Ah

'''Function:''' USB Presentation Link Port Mirroring Enable

This port enables or disables the "Presentation Link port mirroring" hardware, which redirects writes to ports [[83Plus:Ports:10|10]] and [[83Plus:Ports:11|11]] to outgoing bulk endpoint 02.
The TI-84 Plus/Silver Edition OS uses this upon connection of the USB Presentation Link adapter.

{{84P-Only Port|10}}

=== Read Values ===
* Bit 0: Set if port mirroring is enabled.
* Bits 1-7: Always 0

=== Write Values ===
* Bit 0: Set to enable port mirroring.
* Bits 1-7: Not used

== Comments ==
When this port is set to 1, the USB controller will send a two-byte packet on outgoing bulk endpoint 02. You must set up endpoint 02 like this yourself before enabling it.

When enabled, a write to [[83Plus:Ports:10|port 10]] will cause the following packet to be sent:

<value written to [[83Plus:Ports:10|port 10]]> 00

A write to port 11 will cause the following packet to be sent:

<value written to [[83Plus:Ports:11|port 11]]> 01

This would seem to imply that the second byte is an offset from [[83Plus:Ports:10|port 10]], but this is untested.

This port only functions in host mode.

Someone with more experience in making guesses as to what the controller and/or hardware is actually doing here should probably provide more input.

@@ Line 1: / Line 1: @@
 [[Category:83Plus:Ports:By Address|5A - USB Presentation Link Port Mirroring Enable]] [[Category:83Plus:Ports:By Name|USB Presentation Link Port Mirroring Enable]]
 == Synopsis ==
 '''Port Number:''' 5Ah
@@ Line 7: / Line 8: @@
 This port enables or disables the "Presentation Link port mirroring" hardware, which redirects writes to ports [[83Plus:Ports:10|10]] and [[83Plus:Ports:11|11]] to outgoing bulk endpoint 02.
 The TI-84 Plus/Silver Edition OS uses this upon connection of the USB Presentation Link adapter.
 === Read Values ===

@@ Line 19: / Line 19: @@
 == Comments ==
-When this port is set to 1, the USB controller will send a two-byte packet on outgoing bulk endpoint 02. You must set up endpoint 02 like this yourself before enabling it.
+When this port is set to 1, the USB controller will send a two-byte packet on outgoing bulk endpoint 02 whenever a value is written to ports [[83Plus:Ports:10|10]] and [[83Plus:Ports:11|11]]. You must set up endpoint 02 like this yourself before enabling it.
 When enabled, a write to [[83Plus:Ports:10|port 10]] will cause the following packet to be sent:
@@ Line 25: / Line 25: @@
   <value written to [[83Plus:Ports:10|port 10]]> 00
-A write to port 11 will cause the following packet to be sent:
+A write to [[83Plus:Ports:11|port 11]] will cause the following packet to be sent:
   <value written to [[83Plus:Ports:11|port 11]]> 01