Sharp MZ-3500 User Manual download pdf (Page 27)

MZ3500

9) Cursor

Sharp of the cursor: Same as seen in Model 3200

Reverse and blink)

10) Light pen input

incorporates the light pen input connector and its inter

face. The light p>en, 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 (6x9 elements) and graphic mode (6x8 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 (640x200 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

GDCl (for character)

GDC2 (for graphic)

#BFFF

17FFF

Attribute

#07FF

2Kbit > 8

2Kbit

( S-RA.M )

(ASCI L

(. s-

R.AM)

#0000

#3FFF

#0000

-----------

16Kbit

(G)

________

(D-RAM)

16Kb, t

I6Kbit

( B)

(R)

DO-

-D7 1)8—011

------

D7 D8-

-D15

Solid line 48KB option

Broken line. To be added to comprise

the 96KB option.

VRAM capacity Graphic option 1: 48KB

Basic 3KB (including altibutes) Graphic option 2 96KB

Bit structure of VRAM

___CRT

640 X 400 dot

640 X 200 dcn

Character VRAM |

8 bit / word 8 bit / word

Graphic

48 KB 1 16 bit / word

8 bit / word

V RAM

96 KB 1 16 bit / word

16 bit / wo'd

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1 2 ... 22 23 24 25 26 27 28 29 30 31 32 ... 115 116

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Sharp MZ-3500 User Manual Page 27

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