83Plus:Ports:16 - Revision history

Dr. D'nar at 01:25, 4 March 2020

2020-03-04T01:25:17Z

Hooloovoo at 22:46, 21 October 2014

2014-10-21T22:46:13Z

Kalimero: /* Credits and Contributions */ new url

2009-06-12T17:03:40Z

‎Credits and Contributions: new url

Kalimero: /* Credits and Contributions */

2007-01-27T23:05:26Z

‎Credits and Contributions

FloppusMaximus: rearranged to address current theories

2005-07-21T06:01:21Z

rearranged to address current theories

AndyJ: added "page" where applicable and linked port 5

2005-07-18T23:39:36Z

added "page" where applicable and linked port 5

FloppusMaximus at 21:14, 30 March 2005

2005-03-30T21:14:40Z

FloppusMaximus at 05:19, 30 March 2005

2005-03-30T05:19:39Z

FloppusMaximus: categorized

2005-03-29T21:54:17Z

categorized

FloppusMaximus: /* Read Values */

2005-03-29T00:03:26Z

‎Read Values

@@ Line 16: / Line 16: @@
 == Comments ==
-The above only applies to the 83+ basic; the port's function on the SE and 84+ is not known.
+The above only applies to the 83+ basic. It does nothing on other models.
 This port is protected, just as [[83Plus:Ports:14|port 14]] is; it is the only other protected port in the original hardware.  Note that as with most protected ports, Flash must be write-enabled for writing to have any effect.

@@ Line 23: / Line 23: @@
 === An alternate version? ===
-The 83+ boot code version 1.00 contains some additional code for handling this port somewhat differently.  Instead of controlling individual pages, each bit corresponds to a Flash ''sector:''
+The TI-73 uses this port differently.  Instead of controlling individual pages, each bit corresponds to a Flash ''sector:''
 * Bit 0: Set if execution is not allowed in sector SA2 (pages 08-0B.)
@@ Line 29: / Line 29: @@
 * Bit 2: Set if execution is not allowed in sector SA4 (pages 10-13.)
 * Bit 3: Set if execution is not allowed in sector SA5 (pages 14-17.)
 == Credits and Contributions ==

@@ Line 33: / Line 33: @@
 == Credits and Contributions ==
-* '''Tijl Coosemans:''' Documentation [http://kalimero.be/83phwinfo.txt here].
+* '''Tijl Coosemans:''' Documentation [http://tijl.ulyssis.be/83phwinfo.txt here].
 == See Also ==

@@ Line 33: / Line 33: @@
 == Credits and Contributions ==
-* '''Tijl Coosemans:''' Documentation [http://www.kalimero.be/83phwinfo.txt here].
+* '''Tijl Coosemans:''' Documentation [http://kalimero.be/83phwinfo.txt here].
 == See Also ==

@@ Line 1: / Line 1: @@
-[[Category:83Plus:Ports:By_Address:Protected|16 - Flash Sector Exclusion]] [[Category:83Plus:Ports:By_Address|16 - Flash Sector Exclusion]] [[Category:83Plus:Ports:By_Name|Flash Sector Exclusion]]
+[[Category:83Plus:Ports:By_Address:Protected|16 - Flash Sector Exclusion]] [[Category:83Plus:Ports:By_Address|16 - Flash Page Exclusion]] [[Category:83Plus:Ports:By_Name|Flash Page Exclusion]]
 {{Protected Port}}
@@ Line 13: / Line 13: @@
 === Write Values ===
-* Bit 0: Set if execution is not allowed in sector SA2 (pages 08-0B.)
+* Each bit maps to a page, as determined by [[83Plus:Ports:05|port 5]].  Set a bit to disallow execution on that page.
-* Bit 1: Set if execution is not allowed in sector SA3 (pages 0C-0F.)
-* Bit 2: Set if execution is not allowed in sector SA4 (pages 10-13.)
-* Bit 3: Set if execution is not allowed in sector SA5 (pages 14-17.)
-* Bit 4: ''Unknown.''
-* Bit 5: ''Unknown.''
-* Bit 6: ''Unknown.''
-* Bit 7: ''Unknown.''
 == Comments ==
 The above only applies to the 83+ basic; the port's function on the SE and 84+ is not known.
-This port is protected, just as [[83Plus:Ports:14|port 14]] is; it is the only other protected port in the original hardware.
+This port is protected, just as [[83Plus:Ports:14|port 14]] is; it is the only other protected port in the original hardware.  Note that as with most protected ports, Flash must be write-enabled for writing to have any effect.
 It is used, as are ports [[83Plus:Ports:22|22]] and [[83Plus:Ports:23|23]] on the SE, to prevent code in the archive from executing, thus theoretically limiting Flash execution privileges to FlashApps.
-See also [[83Plus:Ports:05#Synopsis (TI-83 Plus)|Port 5]].
+=== An alternate version? ===

@@ Line 5: / Line 5: @@
 '''Port Number:''' 16h
-'''Function:''' Flash Sector Exclusion
+'''Function:''' Flash Sector/Page Exclusion
-This port controls which sectors of Flash may contain executable code.
+This port controls which sectors or pages of Flash may contain executable code.
 === Read Values ===
@@ Line 28: / Line 28: @@
 It is used, as are ports [[83Plus:Ports:22|22]] and [[83Plus:Ports:23|23]] on the SE, to prevent code in the archive from executing, thus theoretically limiting Flash execution privileges to FlashApps.

@@ Line 9: / Line 9: @@
 === Read Values ===
-* Nothing useful (mirror of [[83Plus:Ports:14]], I think.)
+* Nothing useful (mirror of [[83Plus:Ports:14|port 14]], I think.)
 === Write Values ===