Sharp MZ-3500 Service Manual page 39

M Z 3500
Pin No
35-37
38
39
40
Polar, ty
Signal Name
AD13ILCO)-
AD15ILC2)
A16 (LC3)
(AT~BTI
NK-CLC)
A17 (CSR)
(CSR-1MAGE)
Vcc
IN/OUT
IN/OUT
OUT
OUT
IN
Function
Provides the following functions based on the operational mode of the GDC (graphic display mode,
character display mode 0, character display mode 1).
1. In the graphic display mode and character display mode 0: Bidirectional address/data bus
2. In the character display mode 1 : Line counter output in connected to the character generator
ROM or graphic RAM address.
• In the graphic and character display mode 0: AD13~AD1 5.
• In the character display mode 1 : LCO~LC1.
(Address Data bus 13 ~ 15)
(Line Count 0 - 2 )
Provides the following functions based on the operational mode of the GDC (graphic display mode.
0. character display mode 1 ):
1. Graphic display mode: Image memory address output.
2. Character display mode 1 : Line counter output.
3. Character display mode 0: Attribute/blinking/timing signal and external line counter clear signal
(Address 16}
(Line Count 3)
(Attribute Blink — Clear Lire Counter)
Provides the following functions based on the operational mode of the GDC (graphic display mode,
character display mode 0, character display mode 1):
1. Graphic display mode: Image memory address output.
2. Character display mode 1 : Cursor display output.
3. Character display mode 0: Cursor display output, character display area (graphic) display area
select timing signal.
(Address)
(Cursor)
(Cursor-image)
+ 5V supply.
- -14 -