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Sharp MZ-3500 service manual Ch At, KA7, CH AI +,! AT A r + + G

Models: MZ-3500

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MZ 3500

6)Screen overlay and displaying on two independent CRT's

As there are two video output channels it will be pos sible to display two independent screens on separate video display unit Overlay is possible on either of

 

Address

 

Data

 

Internal

 

 

 

 

 

 

 

Hex

AS AS AS AS DS DS DS S gnat name

3

2

1

0

2 1

0

of CSP

 

50

0

0

0

0

 

1

ECH1

 

 

 

 

 

1

 

ECH2

 

 

 

 

 

1

 

EAT2

;p i

0

0

0

 

1

SR1

51

 

 

 

 

 

1

 

SR2

 

 

 

 

1

 

SR3

52

0

0

1

0

1

SR4

 

 

 

 

1

 

SR5

 

 

 

 

1

 

SR6

53

0

0

1

1

1

BGC B

 

 

 

 

1

 

BGC R

 

 

 

 

1

 

BGCG

54

0

1

0

0

1

COLOR

 

 

 

 

1

 

BODER

 

 

 

 

1

 

 

55

0

1

0

1

1

08/16

(50)

 

 

 

1

 

40/80

 

 

 

 

 

 

 

 

 

1

 

 

56

0

1

1

0

1

RA-400

 

 

 

 

1

 

V RAM2

 

 

 

 

1

 

V RAM1

57

0

1

1

1

1

25/20

 

 

 

 

1

 

 

 

 

 

 

1

 

 

screens (See preceding item 5) ) The following bit selection is needed for screen overlay

Function

Choice of outputting the character screen on CRT1 0 No 1 Yes Cho ce of outputting the character screen on CRT2 0 No 1 Yes

Choice of whether attribute or cursor be put on the frame that displayed on CRT2 (0 No 1 Yes)

Displays on CRT1 the blue elements contained in the VRAM Displays on CRT1 the red elements contained in the VRAM Displays on CRT1 the green elements contained in the VRAM Displays on CRT2 the blue elements contained in the VRAM Displays on CRT2 the red elements contained in the VRAM Displays on CRT2 the green elements contained m the VRAM

[ Choice of background color display

Color mode

Border color mode in effect

Defines the data size for the graphic RAM (0 8 bits, 1 16 bits) Defines display digits for the character screen

(0 40 digits 1 80 digits)

Connection of a 400 raster CRT

Connection of the 96K bytes VRAM

Connection of graphio GDC

25 lines/20 lines switching (0 25 lines, 1 20 lines)

5D

1 1 0 1

1

08/16

Defines data size for the graphic RAM (0 8 bits 1 16 bits)

;P2

 

1

40/80

Defines display

digits for the character screen

 

1

 

 

(0 40 digits, 1

80 digits)

NOTE Both CRT1 and CRT2 must be high resolution CRT's (640 x 400) or medium resolution CRT's 'RO x Output to each CRT may be possible in the following combination .

Output to each CRT may be possible in the following

CRT1

C R T 2

CH

ASCII

CH ( AT )

CH( AT)

GF

Graphic screen, including overlay of two graphics

 

screens

C.KA7 )

(,f- AT)

 

(AT)

Attached with attribute

CH AI )+(,! ^ AT)

C H ( A r ) + ( , !

M

 

CH

(.1-

C H + G I

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Sharp MZ-3500 service manual Ch At, KA7, CH AI +,! AT A r + + G
Page 24 Page 26