83Plus:Hooks:9BC8 - Revision history

84plusfreak: /* Comments */

2005-04-27T17:51:36Z

‎Comments

FloppusMaximus at 05:15, 30 March 2005

2005-03-30T05:15:03Z

FloppusMaximus: categorized

2005-03-28T17:01:47Z

categorized

FloppusMaximus at 08:22, 28 March 2005

2005-03-28T08:22:26Z

FloppusMaximus at 08:13, 28 March 2005

2005-03-28T08:13:04Z

New page

'''Note:''' Do not take the information on this template page as actual documentation!

The Hooks are named by their hook pointer block address (the four bytes consisting of page, address, and an extra byte), in hexadecimal. An example is [[83Plus:Hooks:9B84]].

----

== Synopsis ==
'''Name:''' ImAHook

'''Hook Pointer Block Address:''' [[83Plus:RAM:8562|8562]]

'''Hook Enable BCALL:''' [[83Plus:BCALLs:1234|1234]]

'''Hook Disable BCALL:''' [[83Plus:BCALLs:5678|5678]]

'''Hook Call BCALL:''' [[83Plus:BCALLs:9012|9012]]

'''Hook Active Flag:''' 6, (iy + 23h)

This hook allows you to change the values that [[83Plus:BCALLs:4972|GetKey]] returns.

== Using the Hook ==
These different values, passed in a, determines what the hook should do.
* 1: The calculator just turned on. There seem to be no other values passed to the hook.
* 2: The calculator is computing 1+1.
** b: 1
** c: 1
** Change b and/or c to affect the output of the problem (which will still look like 1+1 to the user).
* 3: Preparing to turn off due to 2nd+OFF.
** Zero flag: Clear to abort the power off.

== Comments ==
This hook doesn't exist. This is a demonstration only.

== Credits and Contributions ==
* '''/dev/hda1:''' My favorite hard drive partition.

← Older revision		Revision as of 17:51, 27 April 2005
Line 40:		Line 40:
	* On OS 1.15 - BB tokens after GarbageCollect are not passed to the token hook at all. They are always displayed as a question mark.		* On OS 1.15 - BB tokens after GarbageCollect are not passed to the token hook at all. They are always displayed as a question mark.
	* On OS 1.16, and future OS's - BC is the unmodified value as reported by 1.14 for all tokens up to the last actual token supported; DE is set to a value representing a question-mark.		* On OS 1.16, and future OS's - BC is the unmodified value as reported by 1.14 for all tokens up to the last actual token supported; DE is set to a value representing a question-mark.
		+	* On OS 2.20, and future OS's - For the BB tokens after tGarbageCollect BC contains the unmodified value and DE=$0012. All EF tokens are put after these as if EF XX was BB 1XX.

@@ Line 1: / Line 1: @@
-[[Category:83Plus:Hooks:By_Name|Token Hook]]
+[[Category:83Plus:Hooks:By_Name|Token Hook]] [[Category:83Plus:Hooks:By_Address|9BC8 - Token Hook]]
 [[Category:83Plus:Hooks:By_Address|9BC8 - Token Hook]]
 == Synopsis ==
 '''Name:''' Token Hook

← Older revision		Revision as of 17:01, 28 March 2005
Line 1:		Line 1:
		+	[[Category:83Plus:Hooks:By_Name\|Token Hook]]
		+	[[Category:83Plus:Hooks:By_Address\|9BC8 - Token Hook]]
	== Synopsis ==		== Synopsis ==
	'''Name:''' Token Hook		'''Name:''' Token Hook

@@ Line 1: / Line 1: @@
 == Synopsis ==
-'''Name:''' ImAHook
+'''Name:''' Token Hook
-'''Hook Pointer Block Address:''' [[83Plus:RAM:8562|8562]]
+'''Hook Pointer Block Address:''' [[83Plus:RAM:9BC8|9BC8]]
-'''Hook Enable BCALL:''' [[83Plus:BCALLs:1234|1234]]
+'''Hook Enable BCALL:''' [[83Plus:BCALLs:4F99|4F99]]
-'''Hook Disable BCALL:''' [[83Plus:BCALLs:5678|5678]]
+'''Hook Disable BCALL:''' [[83Plus:BCALLs:4F9C|4F9C]]
-'''Hook Call BCALL:''' [[83Plus:BCALLs:9012|9012]]
+'''Hook Call BCALL:''' ''(none known)''
-'''Hook Active Flag:''' 6, (iy + 23h)
+'''Hook Active Flag:''' [[83Plus:Flags:35#Bit_0|0, (iy + 35h)]]
-This hook allows you to change the values that [[83Plus:BCALLs:4972|GetKey]] returns.
+This hook allows you to change the strings displayed for TIOS tokens.
 == Using the Hook ==
-These different values, passed in a, determines what the hook should do.
+* DE = token number * 2
-* 1: The calculator just turned on. There seem to be no other values passed to the hook.
+** 1-byte:     0000 to 01FE
-* 2: The calculator is computing 1+1.
+** Matrix:     0200 to 0212
-** b: 1
+** List:       0214 to 021E
-** c: 1
+** Equation:   0220 to 025C
-** Change b and/or c to affect the output of the problem (which will still look like 1+1 to the user).
+** Picture:    025E to 0270
-* 3: Preparing to turn off due to 2nd+OFF.
+** GDB:        0272 to 0284
-** Zero flag: Clear to abort the power off.
+** String:     0286 to 0298
 == Comments ==
-This hook doesn't exist. This is a demonstration only.
+In OS 1.15 this hook was modified to prevent apps from defining new tokens.  There are two checks in the token getting routine of OS 1.15: one which treats all undefined tokens as a question mark, and one which prevents the token hook from being run if the token is not in the standard OS 1.12 token set.
-== Credits and Contributions ==
+To summarize:
-* '''/dev/hda1:''' My favorite hard drive partition.
+* On OS 1.14 and prior OS's - all BB tokens are reported as 03AA+2T, including hacked tokens.  This caused localizers to crash when they encountered the extended Symbolic tokens.