-
MZ-5600
(2) Window controller (WOe)
Outline
of
woe
function
The
woe
is
used
to
display a certain rectangular area on
the
VRAM
onto
arbitrary locations on
the
display screen,
as
shown
in
the
following figure:
Features
of
woe
color
Each
of
the
rectangular
areas
named A.
B.
C.
and 0
is
called a
window.
Fig.
69
1)
Up
to
four windows can-be displayed
at
a time.
2) The order of priority can
be
specified for each window,
so
that
each window may be overlapped according
to
the
order
of
priority.
3)
When
there are three
VRAM
planes, each of these planes
can be displayed, or
two
or three planes may
be
over·
lapped
on each other.
4)
Input address may be directly
output
without using
the
window feature.
woe
block diagram
lA
0-IA16
0-OT7
la
DTO
~
f----
\~
REGISTER
I--j
DTat:
•
rl
ADDRESS LATCH
J
I
AR
SELECT
I
CS
I--
16
W
f----
t::-Il
ALEN
~
PR
ROW
COLUMN
CL
r
" "
.=."
"rr"
-""
2xCCLK
K COUNTER COUNTER
K
7
10
BLANK
VS
Displ~in~
....s
z1z.
~_w_u_
~
MRS
;J L,J
MAPPING
RAIl
CONTROL
7
10
DiiiiI
_________
J_
--
---
-----------
------,
Mcr
iiifE
MRAO-MRA6
Ex.rnlll
IOllic
~
WE
ROW
MAP
RAil
"r<E
WE
,rcE
MCAO-MCA9
COLUMN
IIAP
RAM
-
.~
DO
D7
From
GDC
~-
-
'1'
a a
81
D
.....
_ ••
10
...
""
..
,
Ym~'n~"~1
I~~'
7 CPU
(windowldd..asl
VllAO
f
~
r---
YDSI
VllAI
8
VRAM
--
rr>-
~
YDSI
_
VIIA2
"'--0
YDSI
,
VllAa
1
-
+",1
4
+
16x4
CK
-
1
,--
~T
-
SO
SI
F/F
IIPX
~
-
SI
SI
(4-1
)
~~
I
1
16
PRIORI'IY
/
f---.
'\
Ilbit
Full
Adder
f--o
IU
T-
F/F
f---.
10..
10..
f---.
-y
CLR
VS
'--
1
~
'----
I
,Jf
IIPX
CMDO
(2-1
)
-CMD3
8 2
RCS
CMDO
-RlIDa
Jm:
-SO
_SI
VSLO
VAI4.VAI5
VAO-VA7
--
-VSL2
I0I0_
Fig. 70
-58-
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