qdosmsq:traps:trap_3:sbyt
Table of Contents
IO_SBYTE/IOB_SBYT
This trap sends a byte to a channel.
| Call Parameters | Return Parameters | ||
|---|---|---|---|
| D0.B | $05 | D0.L | Error code. |
| D1.B | Byte to send. | D1.L | Corrupted. |
| D3.W | Timeout | D3.L | Preserved. |
| A0.L | Channel ID. | A0.L | Preserved. |
Errors
| ERR_NC | Not complete. |
| ERR_NO | Channel not open. |
| ERR_DF | Drive full. |
| ERR_OR | Out of range. |
Notes
- All registers not shown above are not used on entry and are preserved on exit.
Example
The example below shows the use of this trap call to send LF to a file. It is assumed that the channel ID is in A0.
Prt_LF moveq #10,d1 ; LF
moveq #-1,d3 ; Timeout
moveq #IO_SBYTE,d0 ; $05
trap #3 ; Send the byte.
tst.l d0 ; OK? . .
bne error ----> ; . . no!
qdosmsq/traps/trap_3/sbyt.txt · Last modified: 2009/03/02 16:47 by george.gwilt
