OSBPUT

OSBPUT: Write (put) a byte

Specification

6502	Z80	6809	PDP11	80x86	32016	ARM	RISC-V	On entry:	On exit:
A	A	A	R0	AL	R1	R0	A0	= byte to write	preserved
Y	H	Y	R1	BX	R2	R1	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%</code> calls OSBPUT.

Special handles

Some systems allow <code>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
• RISC-V Entry Address: ECALL &AC000A

Implementations

OSBPUT is implemented by all filing systems that allow writing.

See also

• OSBYTE &9D

Filing System Calls
OSFILE : File and directory operations OSARGS : Information on open objects OSBGET : Read (get) a byte OSBPUT : Write (put) a byte	OSGBPB : Read or write multiple bytes of data OSFIND : Open or close an object FSCV : Filing system control

Jgharston 16:57, 6 November 2009 (UTC)