Sharp MZ-800 Manuale utente

SHARP

SERVICE MANUAL

CODE:

OOZMZ8OOIIIIE

PERSONAL COMPUTER

MODEL

MZ-800

MZ-1P16

MZ-1E20

Table of contents

t,

Specification

..

2.

Parts identification

..

3.

Systemdiegram

..

4.

Systemdescriplion

..

4·',

Memorymep

..

4-2.

CustomLSI

.....

4-2-1.

Memoryconlroller

...

4-2-2.

VOcontroller

..

4-2-3. Clock generator end

timing

generator

..

4-2-4. Display address generator

...

4-2-5. Scroll control circuit .....

..................................... 4

................................................... 6

..

9

.

.......................

12

.. ......... 12

..

.....

13

. ......................................... 15

4·2·6. VRAMdeta

inputloutpulcircuil

..

4-2-7. Register functions

....

.............................................................. 20

4-2-8. Pal1etcircuit .....

..

...........

25

4-2-9.

CRTC

register

map

•.

.

................................

26

4-2-10.

ROMconfigufation

...

............................................... 27

4-3. 8255 Programmable Peripheral Interface

...

4-4. 8253 Programmable Interval

Timer

..

.........

................................ 27

..

......

31

4-5. Printer interface

..

4-6. Programmable sound generator

.•

4-7. Joystick

..

4-8.Systemswitchsetups

...

5.

Powersupply

.....

MZ-1P16

.....

. ..................................................

31

.................................................................. 34

.........

35

. .....................................................

35

..

......................................................... 35

. ...................................................

35

SHARP CORPORATION

1

SpedfIution

-f-

I-

tI

;:'

-

:::.

..

.

Dicpl'vmethod

.CoIor

8'lm.p

.....

thod

-

Resolution

PCGmalhocl

320

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200

...

,

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OP 320

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=:!.~-dtofd

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P\o!point

..

VI""'output

Joystick

RF

,

VIDEO

,AnalagRG8woth

tI

••

Ml-820FI

I'ntlrlac.'

Ml-700 -

"'ItB

W.fJOO

-

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compatibll

ijo'flitickdldlcatedl

~

-

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----+

TO'_

:::

.

O'-

"'"'

......

--,

"'

c----I'

~""c:::"'2:::.:ii_

RS-232C OP

Joyllick

density MZ-88,03

-o;;t;;;",,,ixp<lntlr

PlOt

printer

ATAAlcompat,bll

W-1E19,MZ·1Fl1

MZ.'0'lcomPl~

:~'.:::",PI"~

_

Ml-1P18

St.ttu.SC£I011

2.

Parts identification

IFront

view

I

Definable keys

RF

connector

Main keyboard

Channel knob

(home TV channel selection)

BW/color select switch

Composite connector

RGB

connector

EXT cassette jack

Dip switch

(home

TC

cable connection)

Data recorder

POWER

lamp

Cursor control keys

Expantion slot

External printer

output connector

Joystick connector

DELETE

and INSERT keys

RESET

switch

Power input

Volum!! control

2

MZ-1P16

power

supply socket (+SV)

POWER

switch

~ilZ-800

MZ-800

3. System diagram

MZ-1A18

AAMfile

MZ-1A25

Expansion RAM

MZ-1E19

MZ-1x17

MZ interface

MZ-1E20 MZ-1U06

1U06 interfacing

PWB

Expansion

VO

box

MZ-1P16

Plot printer

MZ-1D04

12", 8-tone,

monochrome

CAT

MZ-1D19

14", 18-color, AGBI, CAT

/I~

0,

'J).oh

,

MZ-1E05 MZ-1F19

M

FD

interface Single

floppy

disk drive

MZ-1T04

MZ-811 connection

tape recorder

MZ-8BI03

AS-232C card

MZ-SOP5(K)

MZ-1F02

Dual MFD drive

SO-column,

dot

matrix

printer

25.

/1~

JOYSTICK

ATAAI compatible

3

MZ·1F11 MZ-6F03

MZ

driver

MZ

blank media

MZ-2Z046

DISK BASIC

MZ-2Z047

CP/M

MZ-1C30 MZ-1F19

Expansion cable Single floppy disk drive

MZ-1C30 MZ-1F02

Expansion cable Dual MFD drive

4. System description

Basic RAM, 64KB

KEY

CMT

VF

AMP

r-

--,

I MZ-1R18 slol I

I (dedicated) I

L

___

-.J

PPI

8255

CTC

8253

PSG

SN76489

Expansion

slot-l

[2]'

MFD MZ-1F02

MZ-800

16

KB

l

r---'

I

l.

MZ-1P16

OP

I

r-

---

-,

L

_~

Plot printer I

l

,.--J

PlO

Z-80

PlO

MlSOP5K printer

Printer interface

r----+----.J

Joystick interface

4

VRAM

16

KB

CRTC

(Semi-cuslom)

r-

-----,

I VRAM I

I

16

KB

(OP)

HZ-1R25

L

_____

J )

--~

RS-232C

MZ-8BI03

RGBI

Video

(ATARI compatible)

o

o 0

TV

MZ-1D19

CJ1

-~

Option 16

KB

RESET

GDG

VRAM

ADR.

BUS

'17.73

MHz

VRAM DATA BUS

I-

00

~~~

t

-u

RGBI

0"

u.,

~

I

~CustomlC

OSC

556

Monitor, JI

--ffi]

16KBROM

:'~::::::~

CSROiI.1

(27128

,I

i

0=

3.547 MHz

cPU~

LJ

[

1 Z-80A

t...

OSCJ

Cursor

556

·1

RAS

VRAS

WE

CAS

ADDRESS BUS £

~

"

0

'Cij

1

DATA BUS T J

"

..

CONTROL BUS c.

)(

w--c=

Bus

driver

dn'

Peripheral

VO

bus

CTC

~

Z-80A

~rl

8253

PlO

If

fi

I

1""

General purpose

input

bus '

.~

lci7Jt

&J

PC21

II~~

~

DATA

RECORDER

AMP

L--+

___

,

PA5

PA4

SP

~

PBI

PRINTER

DATA BUS

'1L\2-

CTRLBUS I L/"""'I

PAf

I

~

r I

~fl,--I

~~--'-I

~CTRLBUS

';~

System switch

..)J

(MZ

+--+

Centronics)

External

printer

bus

aJ

,

Q.

.'

CD

iil

3

-

4-1.

Memory

map

The MZ-800 has a different

memory

map depending on

o MZ-800

memory

map

FFFF"

EOOO

0000

COOO

AOOO

01000

--

4000

2000

1000

MAIN

o-RAM

64K.

O-RAM

MZ-700

mode

r---,

~

ROM

~

VRAM

MZ-800

mode

MAIN

o-RAM

64 KB

O-RAM

MZ-800

the mode. To have

compatibility

with

the MZ-700, it has

two

modes

of

the MZ-700

mode

and MZ-800 mode.

O

[J

D

OVOR"';:

__

,

I I I I

: :

In:

lml:

~

__

J L

__

J

,.--,

1 I

: IIV) I

1 I

L

__

oJ

~

640

)(

200

mode

VRAM

320 x 200

mode

NOTE:

r--..,

1 1

:

eX):

1 1

,-

__

.J

Item within

dotted

lin.

represents

an

option

unit

MZ·1R25

Memory

map

changes

after

initial

program

loading

$0000

SI

000

$2000

$8000

SEooo

SFFFF

® Power on (resel)

MZ-800

mode

MON. ROM

CG.ROM

DRAM

V-RAM

(320x2oo

mode)

DRAM

MON. ROM

@

At

start

of

monitor

MZ-700

mode

$0000

r------,

MON.

ROM

$1000

r-----;

LD

A, 08H

OUT (CE), A

=>

DRAM

SDOOO

V-RAM

SEooo

SE010

I<.!'Y.

nM~K

MON. ROM

SFFFF

•

Memory

map at

power

on is in the MZ-800

mode

as

in

®,

but

it

changes

to

the MZ-700

mode

by the

monitor

ROM

when

the

monitor

program

starts.

After

transferring the

CG

data

to

the

VRAM

PCG

area

from

the

CG

ROM at @, the

memory

map

then returns

to

®.

• When the system

program

is completed

to

load,

the

memory

map goes

into

the MZ-700

mode

if

the

system switch (SW1) is set

to

ON side.

If

set

to

OFF

side,

it

changes

to

the MZ-800 mode, then the

memory

map

as

in @. During those changes, all

memory

spaces are composed

of

RAM and isolated

from

ROM and VRAM.

IN

(EOH),

A

=>

©

Wril.

10

PeG

from

CG

MZ-7oo

mode

$0000

$1000

$2000

MON. ROM

CG.ROM

D-RAM

@ System operation

MZ-7oo & 800 modes

$0000

D-RAM

IN

(El

H), A

~

6

SCOOO

V-RAM (CG)

SDOOO

SEooo V-RAM

SE010

MON. ROM

SFFFF SFFFF

L...

___

---'

• Depression

of

the manual reset switch assumes

memory

map transition in order

of

®

~

®

~

@

~

®,

similar

as in the case

of

power

on.

• However, depression

of

the reset switch in conjunc-

tion

with

the ICTRL Ikey assumes the

memory

map

of

@ after being changed once

to

the

MZ-700

or

MZ-800

mode

depending on the state

of

the system switch.

In

the case

of

the

MZ-800 mode,

it

is set

to

the plane I.

IT

(4-color mode)

of

the

320 x 200 mode.

MZ-800

~

port

SEO

MODE -

Function o

SOOOO

-S7FFF

to

DRAM.

0000

1000

2000

3000

4000

DRAM

5000

6000

7000

8000 I

9000 I

I

Aooo I

I

BOOO

I

COOO

I

Dooo I

I

EOOO

I

E070

Fooo I

I

FFFF

L

__

..J

Memory Sank Control

SEl

SE2

SE3 SE4

MZ-7oo

mode

MZ-SOO

mode

-MZ-7oo

mode

MZ-SOO

mode

MZ-7oo

mode

MZ-800

mode

o Soooo -

SFFFF

o SEooo -

SFFFF

o

SOOOO

-

$OFFF

o

$0000

-

SFFFF

o SEooo -

SFFFF

o

SOOOO

-

$OFFF

o

SOOOO

-

$OFFF

to

DRAM.

to

DRAM.

to

monitor

to

VRAM,

key

to

monitor

to

monitor

to

monitor

ROM.

timer,

and

ROM.

ROM. ROM.

monitor

ROM. o

Slooo

-$CFFF o

Slooo

-SlFFF

to

DRAM

to

CG

ROM.

o

Soooo

-$FFFF o S2000 -$7FFF

to

VRAM,

key

and

timer,

and $Cooo -

SDFFF

monitor

ROM.

to

DRAM.

o $8000 -

SBFFF

to

VRAM

(NOTE).

o SEooo -

SFFFF

to

monitor

ROM.

i--l

,---, MONITOR

'--I

1--'

MONITOR MONITOR

I I ROM I I I I ROM ROM

I I I I I I

I I I I I

I

I I I I

I I I

I I I I

I

I I I I

I

I I I I I

I I I

I

I I I I

I I I

I I

I

DRAM

CG

ROM

DRAM

I

I V

RAM

I r--

---

I I

I I (NOTE)

I I

I

I I

DRAM

I I V

RAM

I V

RAM

B I KEY, TIMER

DRAM

I I MONITOR MONITOR

ROM

I ROM

I

L

__

J

Area

within

dotted

line

does

not

involve

change.

DEY,

nMER

MONITOR

ROM

MONITOR

ROM

----1

(NOTE): In

the

case

of

320 x 200

mode,

contents

of

$8000 -$9FFF are

transferred,

instead,

and

those

after

$Aooo are

transferred

to

DRAM.

Power

on

or

RESET

input

7

MZ-800

~rt

OUT

(SE5)

OUT

(SEe)

IN

(SEO)

IN

(SE1)

MODE

MZ-700

mode

MZ-800

mode

MZ-700

mode

MZ-800

mode

MZ-700

mode

MZ-800

mode

MZ-700

mode

MZ-800

mode

Function

o

SDOOO

-S7FFF o

SEOOO

-

SFFFF

o

SDOOO

-

SFFFF

o

SEOOO

-

SFFFF

o S1000 -S1FFF o S1000 -

S1

FFF

o S1000 -S1FFF o S1000 -

S1

FFF

prohibited.

returned

to

returned

to

toCG

ROM.

toCG

ROM.

returned

to

returned

to

the

state

be-

the

state be- o

SCOOO

-

SCFFF

o $8000 -SBFFF

the

state ba-

the

state ba-

fore

prohi-

fore

prohi-

toVRAM

(PCG

to

VRAM

fore

CG

was

fore

CG

was

bited. bited.

RAM).

(NOTE). set. set.

o

SCOOO

-

SCFFF

o $8000 -

SBFFF

to

DRAM.

to

DRAM.

0000

r--l

I--l

1--'

1--,

,---,

1--,

,---,

r--,

I I I I I I I I I I I I

1000 I B B

I I I R

Q8

I ROM ROM

2000 I I I I I I I I

I I I I I I

3000 I I I

I I I I

I I I

4000 I I I I I I

I I I I

5000 I I I I I I

I I

I I I I

8000

I I

I 1 I I

7000 1 I 1 1 I I

'1

I I I

I

8000

I

1

9000 I 1 V

RAM

I 1

Aooo I I

----

DRAM

1 I

Booo 1 I (NOTE)

Cooo I

~

I V

RAM

I

(CGRAM) I 1

DOOO

1 I I

Eooo I I I I

Prohibited

State

before

1 I I

prohibited

I I I

Fooo

Prohibited

State

before

I I I I I

prohibited

I I

1 I I I L

__

J

FFFF

L

__

-.l L

__

-.l L

__

.J

8

MZ-800

4-2. Custom

LSI

The custom

LSI

is a 100-pin single

chip

LSI

on which the

MZ-800

memory

controller (I/O controller) and

CRT

controller, etc. are contained.

4-2-1. Memory controller

Used

for

the control

of

the

memory

bank. Addressing

of

DRAM, ROM, and VRAM is conducted by selection I/O

address,

$EO

-$E6, using OUT

or

IN

command.

I/O

Signal Device (I/O)

address name

4-2-2. 1/0 controller

In this I/O controller is created the select signal

for

assignment

of

MZ-800 internal device.

See Table-2

for

relation

of

internal device vs

I/O

address.

Function

FF

Port

B,

printer data

output

FE

CPR

Z80A Port A, printer control and

timer

interrupt

FD

PlO (I/O) Port B control (Mode

0)

FC

Port A control (Mode

3)

F2

PSG PSG

(0)

PSG

output

port

F1

JOY JOYSTICK (I) Joystick-2

input

port

FO

Joystick-1

input

port

FO

--

(0)

Pallet

write

E6

1

--

(110)

Memory

bank control

EO

D7

Control

port

output

D6

C53

8253 (I/O) Counter-2 (NOTE): Mapped

to

E007

-E004 in the

D5

Counter-1 MZ-700 mode.

D4

Counter-O

D3

Control

D2

KEY

8255

(110)

Port

C,

cassette, etc. (NOTE): Mapped

to

E003

-

EOOO

in the

D1

Port

B,

key

input

MZ-700 mode.

DO

Port A, key strobe

output

CF

0

CE

I/O

CRTC

register

CD

--

0

CC

0

$E008

-- --

I/O

TEMP, HBLK

input;

and 8253

GO

ON/OFF

output

for

the MZ-700

mode

only.

* When above I/O address is accessed,

it

makes 10WR active

for

OUT

or

lORD

for

IN

command.

9

Sharp MZ-800 Manuale utente

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