M z 3500 – Sharp MZ-3500 User Manual
Page 34
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M Z 3500
4Æ. Master slice LSI (CSP-1) SP6102C 002 signal description
Pm No.
Prionly
IN/OUT
Function
Signal Name
1
HSY.
IN
Horizontal synchronizing signal from the GDCl Also, it becomes the refresh timing signal in the
dynamic RAM mode.
2
NABC
IN
Input from the UPO7220 GOC1. When the GDCl is in the character display mode, the attribute,
blinking timing and line counter clear signals are multiplexed.
3
CSR
IN
Input from the GDC1 which is the cursor display input when the GDCl is in the character display
mode.
4 ~ 6
ASO - AS2
IN
Address bus input from the sub-CPU.
ABO = ASO, ABl = AS1, AB2 = AS2
7 ~ 9
DSO - DS2
IN
Data bus input from the sub-CPU.
DBO = DBO. DB1 = DB1, DB2 = DB2
10
G2
OUT
Green image output to the CRT2.
11
NWRO
IN
CSP1 I/O port select signal (OUT #5X)
12
"Nve
IN
Input of The blue image from the graphic RAM(A) and (B).
13
NVR
IN
Input of the red image from the graphic RAM (B), (C), and (D).
14
NVB
IN
Input of the green image from the graphic RAM (E) and (F).
15
FYD2
IN
Input of the graphic RAM parallet/senal conversion 1C 74LS166 shift out clock.
(Used to latch the image data in CSPI.)
16-18
AT2 - AT4
IN
Attribute data input from the 2114A-1 attribute RAM.
fAT-2 — Horizontal tme/R ')
AT-3 ~ Reverse/G 1
[
a
T-4- Blink J
19
CH
IN
Input of character display data signal.
20. 21
GND
IN
OV supply
22
DSP2
IN
Input of display timing signal supplied from the CSP-2. (BLINK signal from the GDC2 is delayed by
two flipflop intervals in the CSP-2 to créât this signal.)
23
VID2
OUT
VIDEO output to CRT2.
24
LCO
OUT
Character CG line counter output.
(Becomes address input to the CG when LCO = CG address AO.)
25
ATI
IN
Attribute data input (vertical Ilne/B) from the 2114A-1 attribute RAM.
26-28
LC1 - LC3
OUT
Character CG line counter output.
(LC1 = A1, LC2 = A2, LC3 = A3CG = A3)
29
NCL4
OUT
Character CG output data latch timing.
30
HSYO
OUT
CRT1,2 horizontal synchronizing signal
31
RA40
OUT
The signal that turns high level when the 400-raster CRT is m connection. LDA, 01 H OUT??56
32
VIDI
OUT
VIDEO output to the CRT1.
33
81
OUT
Blue image output to the CRT1.
34
R1
OUT
Red image output to the CRT1.
35
g
T
OUT
Green image output to the CRTl.
36
SL1
IN
Character CG output parallel/serial converter IC 74LS166 shift load signal, and character CG address
latch signal input. (Used for the image data latch signal in the CSP-1 and horizontal synchronizing
signal delay flipflop clock.)
37
82
OUT
Blue image output to CRT2. ■
38
R2
OUT
Red image output to CRT2.
39
BLNK
IN
Erase signal from the GDC1 which becomes input at the following times.
1. Horizontal flyback period
2. Vertical flyback period
3. Period from the execution of the SYNC SET command to the execution of the DISP START
command.
4. Line drawing period
40
Vcc
IN
+5V supply.
39