OSBPUT
OSBPUT: Write (put) a byte
Contents
Specification
6502 | Z80 | 6809 | PDP11 | 80x86 | 32016 | ARM | 68000 | RISC-V | On entry: | On exit: |
A | A | A | R0 | AL | R1 | R0 | D0 | A0 | = byte to write | preserved |
Y | H | Y | R1 | BX | R2 | R1 | D1 | A1 | = handle | preserved |
An error is generated if the object is a directory or doesn't have write access. The EOF-error-flag is cleared.
Calling from BBC BASIC
-
BPUT#ch%,b%
calls OSBPUT.
Special handles
Some systems allow BPUT#0
to write to the character output stream via OSWRCH.
Entry points
- BBC BASIC Entry Address: &FFD4
- 6502 Entry Address: &FFD4, vectors via &0218
- Z80 Entry Address: &FFD4, vectors via &FFD5
- 6809 Entry Address: &FFD4, vectors via &FFD5
- 80x86 Entry Address: INT &42, vectors via 0000:0108
- 32000 Entry Address: SVC &0E
- PDP-11 Entry Address: EMT 10, vector &0A
- ARM Entry Address: SWI &0B "OS_BPut", vector &0B
- 68000 Entry Address: MOV #&0B,A0:TRAP 12
- RISC-V Entry Address: ECALL &AC000A
Implementations
OSBPUT is implemented by all filing systems that allow writing.
See also
Filing System Calls | |
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Jgharston 16:57, 6 November 2009 (UTC)