IOP.SVPW
This Trap saves part of a window.
| Call Parameters | Return Parameters | ||
|---|---|---|---|
| D0.B | $6D | D0.L | Error code |
| D1.L | x,y start of block in area | D1.L | Address of save area |
| D2.L | 0 or x,y size of save area | D2.L | Preserved |
| D3.W | Timeout | D3.L | Preserved |
| A0.L | Window channel ID | A0.L | Preserved |
| A1.L | Pointer to window block | A1.L | Preserved |
| A2.L | Address of save area (D2 = 0) | A2.L | Preserved |
Errors
| ERR_NO | Channel not open |
| ERR_OR | Out of range |
| ERR_OM | Out of memory (D2<>0 only) |
Notes
- All registers not listed above are unused and preserved.
- The pixel position in D1.L defines the start of the save area to which the block defined by A1 is to be put.
- If D2 is 0 there must be a save area already set up with an address given in A2, otherwise an area is set up of the size given in D2 and its address is returned in D1.L.
- The window block to which A1.L points defines the area to be saved. Its form is given below. The origin is relative to the window whose ID is in A0.
Window Block
| Address | Size | Item |
|---|---|---|
| $00 | word | X-size |
| $02 | word | Y-size |
| $04 | word | X-origin |
| $06 | word | Y-origin |
george.gwilt