IOP.SLNK
This trap accesses the console linkage block and sets bytes in it.
| Call Parameters | Return Parameters | ||
|---|---|---|---|
| D0.B | $6F | D0.L | Error return |
| D1.W | Position in linkage to set | D1.L | Preserved |
| D2.W | Number of bytes to set | D2.L | Preserved |
| D3.W | Timeout | D3.L | Preserved |
| A0.L | Window channel ID | A0.L | Preserved |
| A1.L | Pointer to data to set | A1.L | Address of linkage block |
Error
| ERR_NO | Channel not open |
Notes
- All registers not mentioned above are unused and preserved.
- The number of bytes in D2.W is set from the address in A1.L to the address D1.W bytes from the start of the console linkage block.
- If D2.W is set to zero, no bytes are sent but the address of the linkage block is still returned in A1.L. This provides a way of accessing the linkage block without altering it.
Example
The example shows how to access the linkage block's address.
con dc.w 3
dc.b 'con'
get_ad lea con,a0 ; To open a window
moveq #0,d3
moveq #-1,d1 ; This job
moveq #io_open,d0
trap #2 ; Open the channel
moveq #0,d2 ; Send no bytes
moveq #$6F ; IOP.SLNK
trap #3 ; sets the address in A1
moveq #io_close,d0
trap #2 ; close the channel
; The linkage address is now in A1
george.gwilt