Sharp MZ-350C Service Manual page 27

M ^ 3500
2) 20-line display mode
10
Without line
Graphic Symbol
2) 20-line display mode
8
20«
20
XXSNNX^-ll
With line
HL: On 18th raster
VL: Line to the right of
element
c V L does not join
0 In the case of graphic
Symbol display, VL is
overlaid to the pattern.
Graphic Symbol |
9) Cursor
Sharp of the Cursor: Same äs seen in Model 3200
Reverse and blink)
10) Light pen input
Incorporates the light pen input connector and its inter-
face. The light pen, however, is an Option.
Accuracy: By each Character
Function: Coordinates/character code
11) Difference in specification with that of Model 3200
(1) There are two modes for the Model 3200; normal
mode ( 6 x 9 elements) and graphic mode ( 6 x 8 ele-
ments). In the normal mode of 25-line displaying of
the PC-3200, vertically adjacent graphic symbols do
not joint. But, they will joint with the Model 3500.
Model-3200
Model 3500
(2) No line will be displayed for the medium resolution
CRT (640 x 200 dot).
It is possible to display line on the high resolution
CRT, compatible to line the utilizing program of
the Model 3200
4-2. Video RAM
1) Structure of VRAM
GDC1 (for Character)
GDC2 (for graphic)
# B F F F
*7FFF
16Kbit
(G)
Attribute
# 0 7 F F
# 0 0 0 0
2 K b i t * 8
( S -R AM)
(ASCI L
2 K b i t
x 4
(S-
RAM)
# 3 F F F
# 0 0 0 0
(D-RAM)
16Kbit
xS
( B )
1 6 K b i t
x8
( R )
DO-
-D7 D8—DU
DO-
-D7 D8-
-D15
Solid line: 48KB Option
Broken line: To be added to comprise
the 96KB Option.
V R A M capacity Graphic Option 1: 48KB
Basic: 3KB (including attibutes) Graphic Option 2: 96KB
Bit Structure of V R A M
— — £^J 6 4 0 x 4 0 0 dot
Character V R A M
Graphic l 4 8 K B
V-RAM j
96 KB
j 8 bit / word
16 bit / word
16 b<t / word
640 x 200 de i
8 bit / word
8 bit / word
16 bit / word
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