Table of Contents
Advertisement
-
M Z 3!)()O
Polarl1y
I
I
P,n No
.. .
---1
IN/OUT
Function
SIgnal Name
I
~--
-~-----+
- - - -
--
35-37
AD13(LCO)-
IN/OUT
ProvIdes the followIng functions based on the operational mode of the GDC (graphic display mode,
AD15(LC2)
character dIsplay mode O. character display mode 1l.
1. In the graphic d,splay mode and character display mode 0: Bldorectlonal 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-AD15 .
• In the character dISplay mode 1: lCO-lC1.
(Address Data bus 13 - 15)
I
(line Count 0 - 2)
---_._----+-
38
I
A16 (LC3)
I
OUT
Provides the following functions based on the operational mode of the GDC (graphic display mode,
(ATlITl
O. character display mode 1):
NK·CLC)
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 IlOe counter clear Signal
(Address 16)
(line Count 3)
(Attribute Blink - Clear lire Counter)
39
A17(CSR)
I
OUT
Provides the following functions based on the operational mode of the GDC (graphic display mode,
(CSR·IMAGE)
character display mode O. 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 displav output, character display area (graphic) dISplay area
select timing signal.
(Address)
(Cursor)
(Cursor-image)
40
Vcc
IN
+5V supply.
- ,14 -
Advertisement
Table of Contents
