Difference between revisions of "83Plus:BCALLs:44F2"
From WikiTI
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.DB bPage | .DB bPage | ||
Do not B_CALL this entry point, only B_JUMP. Unlike other B_JUMPs, however, this one does return. | Do not B_CALL this entry point, only B_JUMP. Unlike other B_JUMPs, however, this one does return. | ||
| − | It could have uses for multipage applications, I guess. TI-Navigator uses it like this. | + | It could have uses for multipage applications, I guess. Push a return address before the below code if you want to regain control. TI-Navigator uses it like this. |
== Example == | == Example == | ||
| − | Jump to ClrLCDFull and end execution (on OS 1.12): | + | Jump to ClrLCDFull and end execution (on OS 1.12 from a RAM program): |
ld hl,dataPtr | ld hl,dataPtr | ||
Revision as of 22:53, 17 December 2006
Synopsis
Unofficial Name: OffPageJump
BCALL Address: 44F2
Jumps to a specified address on a specified page.
Inputs
- Push pointer to table entry before calling
Outputs
- None
Destroys
- Unknown
Comments
Push the address of a B_CALL table entry before B_JUMPing to this entry point. Such an entry looks like this:
.DW wAddress .DB bPage
Do not B_CALL this entry point, only B_JUMP. Unlike other B_JUMPs, however, this one does return. It could have uses for multipage applications, I guess. Push a return address before the below code if you want to regain control. TI-Navigator uses it like this.
Example
Jump to ClrLCDFull and end execution (on OS 1.12 from a RAM program):
ld hl,dataPtr B_JUMP OffPageJump dataPtr: .dw 5A71h ;these are specific to OS 1.12 .db 01h
