Difference between revisions of "NVRDCH"
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Latest revision as of 19:12, 8 March 2015
Nonvectored OSRDCH - Waits for a character from the current input stream.
Specification
| On exit: | |
| A | = Byte read |
| X | preserved |
| Y | preserved |
| Cy | Error status |
Jumps to the default OSRDCH code bypassing RDCHV. It should not be called directly by programs. It is often used by code that intercepts OSRDCH to pass on calls to the default RDCH code.
Calling from BBC BASIC
BBC BASIC does not call NVWRCH.
Entry points
- BBC BASIC Entry Address: none
- 6502 Entry Address: &FFC8
- Z80 Entry Address: none
- 6809 Entry Address: none
- 80x86 Entry Address: none
- 32000 Entry Address: none
- PDP-11 Entry Address: none
- ARM Entry Address: none
Implementations
Implemented in all 6502 MOS versions.
Jgharston 17:38, 12 December 2007 (UTC)
