83Plus:Ports:02 - Revision history

TheStorm at 03:03, 25 August 2016

2016-08-25T03:03:31Z

2013-06-22T02:09:22Z

‎Write Values: noted that writes only apply to the TI-83+SE and above

2013-03-27T22:25:51Z

2013-03-15T05:17:09Z

2011-10-31T16:06:23Z

Typo - port 04 displayed port 02

2011-09-17T17:15:44Z

2008-05-02T04:25:07Z

2005-08-21T15:17:35Z

Added Kalimero's info

2005-08-08T06:40:44Z

Added link to port 2f

2005-07-22T20:39:55Z

Changed the purpose of bit 1

@@ Line 17: / Line 17: @@
 * '''84+(SE) only:''' Bit 5: Set for TI-84+ and TI-84+ SE calculators. Reset for TI-83+ and TI-83+ SE calculators. More specifically, this indicates if the calculator is USB-capable or not.
 * Bit 6: Indicates if Link Assist is available.
-* Bit 7: Reset for a TI-83+ Basic. Set for everything else.
+* Bit 7: Reset for a TI-83+ Basic and TI-73. Set for everything else.
 === Write Values ===

@@ Line 20: / Line 20: @@
 === Write Values ===
 * Bit 0: Write a 0 to acknowledge the ON key interrupt; write 1 to leave the status of the ON key interrupt alone.
 * Bit 1: ACK HW timer 1

@@ Line 1: / Line 1: @@
-[[Category:83Plus:Ports:By Address|02 - Status Port]] [[Category:83Plus:Ports:By Name|Status Port]]
+[[Category:83Plus:Ports:By Address|02 - Status Port/Interrupt Acknowledge]] [[Category:83Plus:Ports:By Name|Status Port/Interrupt Acknowledge]]
 == Synopsis ==
 '''Port Number:''' 02h
@@ Line 20: / Line 20: @@
 === Write Values ===
-* No useful effect.
+* Bit 0: Write a 0 to acknowledge the ON key interrupt; write 1 to leave the status of the ON key interrupt alone.
 == Comments ==

@@ Line 15: / Line 15: @@
 ** Bit 4: Last value written to port 05 bit 1
 ** Bit 5: Last value written to port 05 bit 2
-* '''84+(SE) only:''' Bit 5: Set for TI-84+ and TI-84+ SE calculators. Reset for TI-83+ and TI-83+ SE calculators.
+* '''84+(SE) only:''' Bit 5: Set for TI-84+ and TI-84+ SE calculators. Reset for TI-83+ and TI-83+ SE calculators. More specifically, this indicates if the calculator is USB-capable or not.
 * Bit 7: Reset for a TI-83+ Basic. Set for everything else.

@@ Line 8: / Line 8: @@
 === Read Values ===
-* Bit 0: Set if the batteries are good. Reset if the batteries are low. The calculator will refuse to Garbage Collect or receive a FLASH App or OS when the batteries are low. The voltage cutoff can be configured in [[83Plus:Ports:04|port 02]].
+* Bit 0: Set if the batteries are good. Reset if the batteries are low. The calculator will refuse to Garbage Collect or receive a FLASH App or OS when the batteries are low. The voltage cutoff can be configured in [[83Plus:Ports:04|port 04]].
 * '''83+SE / 84+(SE) only:''' Bit 1: At 15MHz this bit resets for a set delay after a command or data is sent to the LCD, otherwise this bit is always set. The amount of delay is controlled by [[83Plus:Ports:2F|port 2F]]. On the TI-73, this bit is always reset (this is how you distinguish between the 73 and 83+ series hardware).
 * Bit 2: Set if Flash is currently unlocked.

@@ Line 9: / Line 9: @@
 === Read Values ===
 * Bit 0: Set if the batteries are good. Reset if the batteries are low. The calculator will refuse to Garbage Collect or receive a FLASH App or OS when the batteries are low.
-* '''83+SE / 84+(SE) only:''' Bit 1: At 15mhz this bit resets for a set delay after a command or data is sent to the lcd, otherwise this bit is always set. The amount of delay is controlled by [[83Plus:Ports:2F|port 2F]].
+* '''83+SE / 84+(SE) only:''' Bit 1: At 15MHz this bit resets for a set delay after a command or data is sent to the LCD, otherwise this bit is always set. The amount of delay is controlled by [[83Plus:Ports:2F|port 2F]]. On the TI-73, this bit is always reset (this is how you distinguish between the 73 and 83+ series hardware).
-* Bit 2: Set if flash is currently unlocked.
+* Bit 2: Set if Flash is currently unlocked.
 * '''83+ only:''' Bits 3-5:
 ** Bit 3: Last value written to port 05 bit 0