83Plus:Ports:86 - Revision history

Dr. D'nar: Added information gleaned from HDRC driver

2013-08-14T20:58:57Z

Added information gleaned from HDRC driver

Thepenguin77 at 04:19, 28 October 2011

2011-10-28T04:19:38Z

Thepenguin77 at 23:53, 17 September 2011

2011-09-17T23:53:43Z

Thepenguin77 at 19:53, 6 June 2011

2011-06-06T19:53:42Z

Thepenguin77: bit 7

2011-06-02T19:49:28Z

bit 7

FloppusMaximus: Port 86: miscellaneous events

2010-11-12T02:31:10Z

Port 86: miscellaneous events

New page

[[Category:83Plus:Ports:By Address|86 - USB Miscellaneous Events]] [[Category:83Plus:Ports:By Name|USB Miscellaneous Events]]
== Synopsis ==
'''Port Number:''' 86h

'''Function:''' USB Miscellaneous Events

This port reports when various device-level USB events occur.

{{84P-Only Port|06}}

=== Read Values ===
'''Reading from this port also clears it. Remember the value you read, because you can't go back and read it again.'''
* Bit 0: Possibly set if the bus has been suspended (no activity for some length of time.)
* Bit 1: Unknown; probably related to HNP and/or SRP.
* Bit 2: Set if a bus reset has occurred (both D+ and D? pulled low for some length of time.)
* Bit 3: Unknown.
* Bit 4: Possibly set if a device has been connected (D+, or maybe D?, pulled high for some length of time.)
* Bit 5: Unknown; some sort of error condition.
* Bit 6: Unknown; probably related to HNP.
* Bit 7: Unknown; some sort of error condition.

=== Write Values ===
* No effect

== Comments ==
This port is used to report various bus events, which are not associated with any particular endpoint. Note that this port (probably) only works if [[83Plus:Ports:5B|port 5B]] bit 0 is set. [[83Plus:Ports:Port 8B|Port 8B]] might also act as a mask for this port (note that that port is normally set to A1h in host mode, and 05h in peripheral mode.)

@@ Line 18: / Line 18: @@
 * Bit 5: This usually indicates that something was unplugged.
 * Bit 6: Unknown; probably related to HNP.
-* Bit 7: This usually indicates low batteries.
+* Bit 7: Calculator cannot provide sufficient power. Usually caused by low batteries, although, some devices cause this every time.
 === Write Values ===

@@ Line 3: / Line 3: @@
 == Synopsis ==
 '''Port Number:''' 86h
 '''Function:''' USB Miscellaneous Events
@@ Line 10: / Line 12: @@
 === Read Values ===
 '''Reading from this port also clears it.  Remember the value you read, because you can't go back and read it again.'''
-* Bit 0: Possibly set if the bus has been suspended (no activity for some length of time.)
+* Bit 0
-* Bit 1: Unknown; probably related to HNP and/or SRP.
+** Equivalent HDRC name: MGC_M_INTR_SUSPEND, also MGC_M_INTR_EP0
-* Bit 2: Set if a bus reset has occurred (both D+ and D? pulled low for some length of time.)
+** Set if the bus has been suspended (no activity for some length of time.)
-* Bit 3: Unknown.
+** According to the HDRC driver, this bit is also set for endpoint 0 interrupts
-* Bit 4: Possibly set if a device has been connected (D+, or maybe D?, pulled high for some length of time.)
+* Bit 1:
-* Bit 5: This usually indicates that something was unplugged.
+** Equivalent HDRC name: MGC_M_INTR_RESUME
-* Bit 6: Unknown; probably related to HNP.
+** (Previous text here: "Probably related to HNP and/or SRP.")
-* Bit 7: Calculator cannot provide sufficient power. Usually caused by low batteries, although, some devices cause this every time.
+* Bit 2:
 === Write Values ===

@@ Line 1: / Line 1: @@
 [[Category:83Plus:Ports:By Address|86 - USB Miscellaneous Events]] [[Category:83Plus:Ports:By Name|USB Miscellaneous Events]]
 == Synopsis ==
 '''Port Number:''' 86h
@@ Line 6: / Line 7: @@
 This port reports when various device-level USB events occur.
 === Read Values ===