Joystick; Powersupply - Sharp MZ-800 Service Manual

MZ-800
4-7. Joystick
It permits connection of two ATARI compatible joys-
ticks.
ADO
JOY
DT
DT
DT
DT
~
0
1
2
3
4
DT
DT
5
,l
Gl G2
-<1-
LS365
8255
>>-_____
....,I' t -..
PA4
V
I
1
,..
~
!
"3
4'
6
,..
'7
FWD
BACK
LEFT
RIGHT
TRGl
TRG2
4tWM
+
5V
~GND
(Configuration of joystick-1)
Low active strobes are issued through PA4 (JOY1) of the
8255 and PA5 (JOY2) interrogate switch activation
through inputs to $FO (JOY1) and $F1 (JOY2).
5. Power supply
5-1. Block diagram
F
ACIN
Noise
filter
Rectifierl
filter
Power
switching
CCP
Drive
circuit
1---,
~--I---.
I
I
I
SW
I
I
'-------~~~--~I~
I
L ___
.J
2SW type only
Configuration of ATARI compatible joystick
4-8. System switch setup
System switches are assigned as follows:
i
Function
I
SW No.
I
I
Setup method
+--------
----L------------
I I
1
I . iON: MZ-700 mode
!
MZ-700/MZ-8~ ""ct~':.""'_800
mod,
I
MZ printer with SW2
!
2
i
MZJCentronics printer
I
and SW3 at ON
3 selection
i
Centronics printer with
I
I
I
I
I
I
SW2 and SW3 at OFF
---,-----------4
I
I
Ch,"",d.o" to ,"-
4 External cassette recor-
I
bl d th
. . a e rea on e exter-
der polarity selection I d
I
i
na cassette recor er.
*
Switch setups at the factory
SW1 ...... OFF (MZ-800 mode)
SW2 ...... ON
SW3 ...... ON
} (MZ dedicated printer)
SW4 ...... ON
Switching transformer
Pl
~ ~Sl
__
~---'
+5 V
- - - . rectifierl
filter
P2
High
voltage
+5V
OV
Chassis
L---------------l
Control
35