Difference between revisions of "83Plus:BCALLs:4FF9"
From WikiTI
m (Removed comments from page source. See Talk:83Plus:BCALLs:505C for discussion) |
m |
||
| (One intermediate revision by the same user not shown) | |||
| Line 2: | Line 2: | ||
[[Category:83Plus:BCALLs:By Name:Hook|RunTracerHook]] | [[Category:83Plus:BCALLs:By Name:Hook|RunTracerHook]] | ||
[[Category:83Plus:BCALLs:By Address|4FF9 - RunTracerHook]] | [[Category:83Plus:BCALLs:By Address|4FF9 - RunTracerHook]] | ||
| − | + | ||
== Synopsis == | == Synopsis == | ||
'''Unofficial Name:''' RunTracerHook | '''Unofficial Name:''' RunTracerHook | ||
| Line 20: | Line 20: | ||
=== Destroys === | === Destroys === | ||
| − | + | *A | |
== Comments == | == Comments == | ||
Latest revision as of 12:25, 6 February 2008
Synopsis
Unofficial Name: RunTracerHook
BCALL Address: 4FF9
Checks the first byte of the block for the Trace Hook. If the byte is 83, the hook is run. Otherwise, the active flag for the hook is set to zero.
Inputs
The block for the Trace Hook must be set up correctly.
Outputs
- HL points to the start of the hook.
- F is 6A if the hook was not run.
Destroys
- A
Comments
This BCALL is known to be present in OS 1.13, and is undocumented.
Credits and Contributions
- Michael Cimino
