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/clreqO:
Copy/PCopy Mode
Copy/PCopy (Continue) with Mask
Copy/PCopy Continue
(f) I wt
&
!
/y
I as
t
(f)
(I)
wt
(f)
I
wt
&
!
/y I
as
t
Write (Continue)
with
Mask
Mode
(f) (I) (n)
(p)
wt
[/NWR /LMK /PRED]
=
[x, x, x]
Read Mode
(f) (I) rd
[/NWR /LMK /PRED]
=
[ x,
x,
1]
Not cleared in (f)(l)p(n).
[/NWR /LMK /PRED]
=
[ x, x, O]
Reset
/clreql:
Write
(f)
(I) (p) wt
[/NWR /LMK /PRED]
=
[1,
x,
x]
(f) (p) wt
[/NWR /LMK /PRED]
=
[O, 1, x]
(f)
I pnwt
[/NWR /LMK /PRED]
=
[O,
0,
O]
Not cleared in (f)lnwt.
[/NWR /LMK /PRED]
=
(0,
0,
1]
Write Continue Mode
f
pwt
[/NWR /LMK /PRED]
=
[x, 1,
O]
(f)
I (p)wt
[/NWR /LMK /PRED]
=
[1,
0,
x]
(f) I nwt
[/NWR /LMK /PRED]
=
[ 0,
0,
1]
Not cleared in flpnwt or (f)wt.
[/NWR /LMK /PRED]
=
[ 0,
0,
O]
[/NWR /LMK /PRED]
=
[ x,
1, 1]
Reset
The exec flag is cleared when the rop command is completed.
/cl exec:
Copy and PCopy Mode
Read and Write Mode
Reset
(f) I wt
&
! y I as t
(f)lwt/rd
&
!ylast
The commencement of rop command execution is controlled by the /busy signal. /Busy
is high during two types of timing based on command CA14. /Busy is high in the
following circumstances:
a. It is maintained at high when QA is high, even if req or exec change.
b. During read/writes from the host.
c. When rop mask data is written from the host.
d. Circumstances other than those noted above.
(3) State
ROCC status is determined by the rop mode as well as the posi - tions of the source
and destination rectangles. The status dif - fers depending on the size of the
rectangles. The following describes /NWR and /PRD which determine the ROCC status
when not in the rop mode.
/NWR: Indicates that the number of words in the source rectangle (size when aligned
with a
scale of 16 - pixel uni ts)
is
fewer
than the number of words
in the
destination rectangle.
3-50
NWS-1510/1530/1580
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