83Plus:Hooks:9B8C - Revision history

Brandonw: The Homescreen Hook was never called the Font Hook...that is its own hook, and the localize hook may have been called that

2008-10-05T01:33:55Z

The Homescreen Hook was never called the Font Hook...that is its own hook, and the localize hook may have been called that

Luby: added other name

2008-10-04T14:01:18Z

added other name

HQAT at 13:41, 26 February 2008

2008-02-26T13:41:51Z

HQAT at 13:23, 26 February 2008

2008-02-26T13:23:28Z

Dan Englender: /* Example */ _Random -> Random

2005-04-21T18:56:23Z

‎Example: _Random -> Random

FloppusMaximus at 05:12, 30 March 2005

2005-03-30T05:12:52Z

FloppusMaximus: categorized

2005-03-28T16:57:02Z

categorized

FloppusMaximus at 06:14, 28 March 2005

2005-03-28T06:14:28Z

FloppusMaximus at 06:05, 28 March 2005

2005-03-28T06:05:02Z

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.

@@ Line 2: / Line 2: @@
 == Synopsis ==
 '''Official Name:''' Homescreen Hook
 '''Hook Pointer Block Address:''' [[83Plus:RAM:9B8C|9B8C]]

@@ Line 1: / Line 1: @@
 [[Category:83Plus:Hooks:By_Name|Homescreen Hook]] [[Category:83Plus:Hooks:By_Address|9B8C - Homescreen Hook]]
 == Synopsis ==
-'''Name:''' Homescreen
+'''Official Name:''' Homescreen Hook
 '''Hook Pointer Block Address:''' [[83Plus:RAM:9B8C|9B8C]]

@@ Line 27: / Line 27: @@
 ** Return NZ to ignore the keypress.
 * 2: An expression was entered to be evaluated.
-** OP1 contains the name of the entry, prgm#.
+** OP1 contains prgm!.
-** To retreive the expression to be evaluated use prgm!.
+** To retreive the expression to be evaluated use prgm#.
 ** Return NZ to cancel running the program.
 * 3: Changing context to the homescreen.

@@ Line 28: / Line 28: @@
 * 2: An expression was entered to be evaluated.
 ** OP1 contains the name of the entry, prgm#.
 ** Return NZ to cancel running the program.
 * 3: Changing context to the homescreen.

@@ Line 40: / Line 40: @@
          or a                ; are we in condition 0 (display value?)
          jr nz,ReturnZ
-         B_CALL _Random      ; change our output value to a random #
+         B_CALL Random      ; change our output value to a random #
 ReturnZ:
          cp a                ; set zero condition

← Older revision		Revision as of 16:57, 28 March 2005
Line 1:		Line 1:
		+	[[Category:83Plus:Hooks:By_Name\|Homescreen Hook]]
		+	[[Category:83Plus:Hooks:By_Address\|9B8C - Homescreen Hook]]
	== Synopsis ==		== Synopsis ==
	'''Name:''' Homescreen		'''Name:''' Homescreen

@@ Line 1: / Line 1: @@
 == Synopsis ==
-'''Name:''' ImAHook
+'''Name:''' Homescreen
-'''Hook Pointer Block Address:''' [[83Plus:RAM:8562|8562]]
+'''Hook Pointer Block Address:''' [[83Plus:RAM:9B8C|9B8C]]
-'''Hook Enable BCALL:''' [[83Plus:BCALLs:1234|1234]]
+'''Hook Enable BCALL:''' [[83Plus:BCALLs:4FAB|4FAB]]
-'''Hook Disable BCALL:''' [[83Plus:BCALLs:5678|5678]]
+'''Hook Disable BCALL:''' [[83Plus:BCALLs:4FAE|4FAE]]
-'''Hook Call BCALL:''' [[83Plus:BCALLs:9012|9012]]
+'''Hook Call BCALL:''' ''(none known)''
-'''Hook Active Flag:''' 6, (iy + 23h)
+'''Hook Active Flag:''' [[83Plus:Flags:34#Bit_4|4, (iy + 34h)]]
-This hook allows you to change the values that [[83Plus:BCALLs:4972|GetKey]] returns.
+This hook is called when various events occur on the homescreen.
 == Using the Hook ==
-These different values, passed in a, determines what the hook should do.
+These different values, passed in A, determine what the hook should do.
-* 1: The calculator just turned on. There seem to be no other values passed to the hook.
+* 0: The calculator is displaying a result.
-* 2: The calculator is computing 1+1.
+** [[83Plus:RAM:8478|OP1]] = the value to display
-** b: 1
+** You can change the value in OP1 to display something different, which will not affect the value stored to Ans.
-** c: 1
+** If you want to display something wider than the screen, you must also write the formatted string to [[83Plus:RAM:97B1|fmtString]].
-** Change b and/or c to affect the output of the problem (which will still look like 1+1 to the user).
+** Return NZ and TIOS will not display anything.
-* 3: Preparing to turn off due to 2nd+OFF.
+* 1: A key was pressed at the homescreen.
-** Zero flag: Clear to abort the power off.
+** B = keycode
-== Comments ==
+ <nowiki>HomescreenHook:
-This hook doesn't exist. This is a demonstration only.
+        .db 83h             ; Required for all hooks
 == Credits and Contributions ==
-* '''/dev/hda1:''' My favorite hard drive partition.
+* '''Michael Vincent:''' Analysis and writing the most amazingly cool homescreen hacks I've seen yet.