Panasonic JB-3300 Technical Manual page 62

Is
Video-RAM
Address O
Yes
Are
VD7 to VbO
OK?
Are
DB7 to DBO
OK?
Yes
Is
HSYNC STA
OK?
Yes
Is
VSYNC Signal
OK X:3C-17
|
j=
VSYNC | |
119.8y
Yes
No
X:9J6 to 14
No
X:9D2 to 9
No
X:9D11 to 18
PDPC Video-RAM
™| Address Controller
PDPC Video-RAM
~| Data Bus
== PDPC, MPU Data Bus
II. 5.9 (7)
__
II. 5.9 (k)
It. 5.9 (k)
No
X:3C-11
39.93 '
HSYNC STA
pine
17.58u
No !
18.61 m
CRTC-CLK
OK?
we} Video-RAM Chip
II. 5.9 (k)
Figure 9-7 (2/2)
46
[—
Ir. 5.9 (h)
PFPC CRTC-Clock
Control Circuit
_ PDPC CRTC Parameter
Converter
CRTC LSI
II. 5.9 (e) (i)