Difference between revisions of "83Plus:Hooks:9BA8"
From WikiTI
m |
|||
| (3 intermediate revisions by 2 users not shown) | |||
| Line 1: | Line 1: | ||
| + | [[Category:83Plus:Hooks:By_Name|Trace Hook]] [[Category:83Plus:Hooks:By_Address|9BA8 - Trace Hook]] | ||
== Synopsis == | == Synopsis == | ||
'''Name:''' Trace Hook | '''Name:''' Trace Hook | ||
| Line 8: | Line 9: | ||
'''Hook Disable BCALL:''' [[83Plus:BCALLs:4FF6|4FF6]] | '''Hook Disable BCALL:''' [[83Plus:BCALLs:4FF6|4FF6]] | ||
| − | '''Hook Call BCALL:''' | + | '''Hook Call BCALL:''' [[83Plus:BCALLs:4FF9|4FF9]] |
| − | '''Hook Active Flag:''' 0, (iy + 36h) | + | '''Hook Active Flag:''' [[83Plus:Flags:36#Bit_0|0, (iy + 36h)]] |
| − | This hook allows you to change the | + | This hook allows you to change the actions that happen when tracing a graph. |
== Using the Hook == | == Using the Hook == | ||
These different values, passed in a, determines what the hook should do. | These different values, passed in a, determines what the hook should do. | ||
| − | * 0: Unknown what this is used for, but it's called between the a=1 and a=4 hookcalls | + | * 0: Unknown what this is used for, but it's called between the a=1 and a=4 hookcalls. |
| + | ** b: contains the function that will be graphed y1=01 .. y0=0A or x1=01.. x6=06 or r1=01 .. r6=06 or u=01 .. w=03. | ||
* 1: The trace cursor will move. | * 1: The trace cursor will move. | ||
** Zero flag: clear to abort the move. | ** Zero flag: clear to abort the move. | ||
Latest revision as of 21:13, 29 March 2005
Synopsis
Name: Trace Hook
Hook Pointer Block Address: 9BA8
Hook Enable BCALL: 4FF3
Hook Disable BCALL: 4FF6
Hook Call BCALL: 4FF9
Hook Active Flag: 0, (iy + 36h)
This hook allows you to change the actions that happen when tracing a graph.
Using the Hook
These different values, passed in a, determines what the hook should do.
- 0: Unknown what this is used for, but it's called between the a=1 and a=4 hookcalls.
- b: contains the function that will be graphed y1=01 .. y0=0A or x1=01.. x6=06 or r1=01 .. r6=06 or u=01 .. w=03.
- 1: The trace cursor will move.
- Zero flag: clear to abort the move.
- 2: The trace cursor wants to move outside the screen and thus the graph will be (partially) redrawn.
- 3: The trace cursor blinks.
- Zero flag: Clear to stop the blinking
- 4: The trace cursor is (re)drawn
- Zero flag: Clear to abort the drawing of the cursor. (The blinking pixel in the middle will still blink at the position the cursor wasn't drawn)
Comments
This documentation is probably incomplete.
