qdosmsq:traps:trap_1:arpa
Table of Contents
MT_ALRES/SMS_ARPA
This trap allocates space in the resident procedures area.
| Call Parameters | Return Parameters | ||
|---|---|---|---|
| D0.B | $0E | D0.L | Corrupted? |
| D1.L | Number of bytes required. | D1.L | Corrupted. |
| D2.L | Unused. | D2.L | Corrupted. |
| D3.L | Unused. | D3.L | Corrupted. |
| A0.L | Unused. | A0.L | Base address of allocated memory. |
| A1.L | Unused. | A1.L | Corrupted. |
| A2.L | Unused. | A2.L | Corrupted. |
| A3.L | Unused. | A3.L | Corrupted. |
Errors
| ERR_NC | Not complete (usually means some jobs have been EXEC'd.) |
| ERR_OM | Out of memory |
Notes
- All registers not shown above are not used on entry and are preserved
on exit.
- This trap is how the SuperBasic function RESPR works. It allocates space in the resident procedures area, but only if there are no jobs running.
Example
The following shows the use of this call.
moveq #mt_alres,d0 ; Trap code
move.l #1024,d1 ; 1 Kbyte required in resident procedure space
trap #1 ; Allocate the space
tst.l D0 ; Did it work ?
bne.s oops ; No, handle errors
; All ok, use tha space allocated from (A0) onwards.
:
:
qdosmsq/traps/trap_1/arpa.txt · Last modified: 2009/01/30 11:53 by norman
