Sharp MZ-800 Service Manual page 23

MZ-800
Table-2 Display mode vs read format register
Display mode SRCH/SING B/A IV
m
n
Function (NOTE)
--------------r---------------+--------+---------~----~----_+----_r----~--------------------__i
Single color
data read
320 x 200.
4116
colors
640 x 200.
1/4
colors
Frame A: "0"
o
Frame B: "1"
o
o
o
Plane I data read
o o o
Plane
n
data read
~--~-----+-----+----~-----------------------
o
o o
Plane
m
data read
o
o
o
Plane IV data read
-----------~--------------~---------~--------_+----_+----~----4_----+_--------------------~
Specified color
search
-----
-~-.---
c---
320 x 200.
4 colors
320 x 200.
16 colors
640 x 200.
1 color
640 x 200.
4 colors
MZ-700
(*):
Refer to the display frame of Table-1.
NOTES:
1
1
0
•
Read for the non-existing VRAM are not assured .
o
x
0
1
x
0
• The above parameter has to be set up for the MZ-700
mode.
*
B/A must be set to "0" for the standard MZ-800
(without MZ1 R25).
x
x
x
x
o
o
o
o
o
o
o
1
x
x
x
x
x
x
x
x
0
22
x
o
o
T.
n
dot search
x
o
I,
n
dot search
x
o T. n
dot search
x
L
n
dot search
o
x
x
m.W
dot search
x x
m.
W
dot search
o
x x
m.
IV dot search
x x
m.
IV dot search
o o o
T.1f.
m.
IVC
dot search
o
o
L1f.
m.
IVC
dot search
o o
T.
n.
m.
IV. dot search
o
I.
n.
m.
IV.
dot search
o o
T.
n.
m.
IV. dot search
1 1 1
L
n. m.
IV.
dot search
x x 0
T.
dot search
x x
1 I. dot search
0
x x
m.
dot search
1
x x
m.
dot search
0
x
0
T.
m.
dot search
0
x 1
L
m.
dot search
1 x
0
T.
m.
dot search
1 x 1
I.
m.
dot search
0 0 1 Data. ATB. CG area read