IOW_BLKP etc

These SMSQ/E traps draw blocks using GD2 colours.

Trap	Value of D0.B	Action
IOW_BLKP	$5C	Draw palette colour block
IOW_BLKT	$5D	Draw true colour block
IOW_BLKN	$5E	Draw native colour block

Call Parameters		Return Parameters
D0.B	See above	D0.L	Error return
D1.L		D1.L	Corrupted?
D3.W	Timeout	D3.L	Preserved.
A0.L	Channel ID	A0.L	Preserved.
A1.L	Pointer to block definition.	A1.L	Corrupted?
A2.L	Pointer to colour definition	A2.L	Preserved?

ERR_NC	Not complete.
ERR_NO	Channel not open.
ERR_OR	Block outside window

All registers not shown above are not used on entry and are probably preserved on exit.
A1.L points to a set of four words in the usual form:
- X-size
- Y-size
- X-origin (relative to window origin)
- Y-origin (relative to window origin)
A2.L points to three long words:
- Stipple colour 1
- Stipple colour 2
- Stipple code (-1 to 3)

The example below shows the use of this trap call to print a block. It is assumed that A0 contains the window's channel ID.

blck    moveq   #iow_blkt,d0    ; $5D
        lea     bk,a1           ; Block definition
        lea     cl,a2           ; Colour definition
        moveq   #-1,d3          ; Timeout
        trap    #3              ; Draw block
        tst.l   d0              ; OK? . .
        bne     error           ; . . no!

bk      dc.w    100,48          ; Size
        dc.w    10,10           ; Position in window

bk      dc.l    $B66D6D00       ; Brick (1st stipple colour)
        dc.l    $00FFFF00       ; Cyan  (2nd stipple colour)
        dc.l    3               ; Stipple code

IOW_BLKP etc

Errors

Notes

Example

QDOS Internals