Service manual

ManualsBrandsSharp ManualsComputer equipmentmz-800

MZ-800

See

next

for

the contents

of

the

information

block.

Name

Byte

count

Function

Note

ATRB

1

Attribute

NAME

17

File

name

(16 characters

maximum)

CR

(OD)

affixed

SIZE

2

File byte size

DTADR

2

Loading address

EXADR

2 Execution address

1----

COMNT

104

Comment

Rotation

of

the cassette (dedicated) is

controlled

by

the

8255

and its peripheral circuits.

To cassette

8255

r-~-~-----

MOTOR

PC.

PC3~--t.

ClR

r-~-+~~~-

SENCE

Q~

If switch has

not

been

ON

on

the

cassette recorder side,

SENCE

signal is in

high

state. When a switch (REW,

FF,

etc.) is pushed,

it

makes

the

signal

turned

low.

It presets

the

D-FF

and

the

motor

starts

to

rotate

with

MOTOR in

high state. With

lock given

to

the

D-FF

through

PC3,

it

permits on/off control

of

the

motor.

If

a switch is pushed

on

the cassette recorder side,

it

permits

examination

of

the

motor

operating state

by

means

of

Land

PC4.

Repeated

-

SENCE

1-1---------,1,..---

PC

3

__

.L

L...---'\\---t---""F:

======:;::1

rL

MOTO~

! L

®

=====*==~~~====*=====~:'\

:

Execution

No

change

·PLA

Y t "

of

load in MOTOR is

command

signal

(PC4)

displayed.

Ur===i=1

=

PLAY

SW ON

End

of

load

30

In

order

of

low

to

high order

Not

used

For use

of

other

than MZ-800 cassette tape recorder

type,

it

needs

to

short

SENCE

to

GND,

READ

to

EXREAD, and

WRITE

to

EXWRITE

of

the

connector T-5.

Use

of

the

cassette recorder

of

other

kind may some-

times

not

permit

proper

loading and saving operation.

In such an event,

adjust

the

volume

and

tone

controls

to

find

the

optimum

positions. To meet the opposite

polarity

of

cassette tape recorder, there is a

dip

switch

provided. Changing

the

switch position makes TPSW

signal

state changed so as

to

invert

the

signal wave-

form.