Sharp MZ-800 User manual

Personal Computer
MZ-SOO
OWNER’S MANUAL

Personal Computer
MNZSOO
Owner’s
Manual
(© SHARP CORPORATION

NOTICE
This manual has been written for the MZ-800 personal computers and the BASIC
interpreter (1Z-016) which is provided with the MZ-800.
(1) All system software for the MZ-800 computers is supported in software packs
(cassette tape, etc.) in file form. The contents of all system software and
the material presented in this manual are subject to change without prior
notice for the purpose of product improvement and other reasons, and care
should be taken to confirm that the file version number of the system soft-
ware used matches that specified in this manual.
(2) All system software for the Sharp MZ-800 personal computer has been de-
veloped by the Sharp corporation, and all rights to such software are reserved.
Reproduction of the system software or the contents of this book is pro-
hibited.
(3) This computer and the contents of this manual have been fully checked for
completeness and correctness prior to shipment; however, if you should en-
counter any problems during operation or have any questions which cannot
be resolved by reading this manual, please do not hesitate to contact your
Sharp dealer for assistance.
Not withstanding the foregoing, note that the Sharp Corporation and its
representatives will not assume responsibility for any losses or damages in-
curred as a result of operation or use of this equipment.

Preface
Congratulations on purchasing the MZ-800 computer. Your MZ-800 is a compact personal computer,
featuring 640 x 200 dot addressable graphics, 16-colour display, and a programmable sound genera-
tor (PSG) which can generate 3-tone chords over 6 octaves. One of the excellent features of the MZ-800
is that it contains hardware which makes it compatible with the MZ-700 series computer. This makes
it possible for you to use most of the existing programs for the SHARP MZ-700 series computers on
your MZ-800.
This manual is written both as a guide to the MZ-800 and a BASIC reference manual. The manual
is constructed as follows.
Chapter I describes how to unpack, handle, and setup your MZ-800, and what to do if a problem occurs.
Chapter 2 describes how to turn on the power, load the BASIC interpreter, and turn off the power.
Chapter 3 explains the BASIC interpreter. This chapter also shows you how to write a simple pro-
gram, edit it, save it on a cassette tape and load it back into memory.
Chapter 4 describes the functions of the keyboard keys. This chapter also describes how to operate
the data recorder and handle tapes.
Chapter 5 presents the background knowledge you need to be able to write programs.
Chapter 6 describes the BASIC commands and statements.
Chapter 7 describes the hardware configuration of the MZ-800 and I/O port control. It also describes
peripheral devices and how to connect them.
Chapter 8 explains the monitor program, which allows you to ‘bypass’? BASIC and directly access
the MZ-800’s memory.
Chapter 9 explains the MZ-700 mode of the MZ-800.
Make sure that you read the handling and setup instructions before turning on the computer’s power
switch. Read this manual thoroughly to get the most out of your MZ-800 computer.

CONTENTS
Chapter 1 Introduction
1.1 Unpacking .
1.2 Handling ...
1.3 Appearance
1.4 Setup
Chapter 2 Start Up
2.1 Power-on
2.3 Running the Demonstration Program
Chapter 3 Basic Operation
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3.2 Getting to know the Keyboard
3.3 Writing a Simple Program
3.4 Editing Programs ...........
3.5 Saving a Program...
3.6 Loading a Program.
Chapter 4 Keyboard and Data Recorder
4.1 Keyboard
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Chapter 5 Programming Concepts
5.1 Multi-statement Lines and Line Numbers
5.2 Numeric Data and String Data
5.3 Constants...
5.4 Variables ...
5.5 Array Variables
5.6 Expressions
5.9 Screen Coordinates .
Chapter 6 MZ-800 BASIC Commands and Statements
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6.2 Fundamental Statements ..
6.3 File Control Statements ...
6.4 Graphics Control Statements .
6.5 Music Control Statements ...
6.6 Printer Control Statements..
6.7 Machine Language Control Statements
6.8 Error Processing Statements

Chapter 7 Hardware
7.1 MZ-800 Hardware .,
7.1.1 System diagram
7.1.2 System switch settings.
7.1.3 I/O port control..
7.2 Peripheral Devices ..
7.2.1 Standard interfaces .
7.2.2 Expansion I/O connector .
7.2.3 RAM file board (MZ-1R18).
7.2.4 Joystick ..
7.2.5 Printers
7.2.6 Optional graphic memory MZ-1R25.
7.2.7 External cassette tape recorder (for MZ-811 only)
- 7-2
7-2
7-3
+ 7-4
- 7-8
7-8
- 7-8
- 7-10
- 7-11
. 7-13
. 7-16
. 7-18
Chapter 8 Monitor
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8.2 ROM Monitor and BASIC Monito
8.3 Starting the ROM Monitor
8.4 Monitor Commands
8.5 BASIC Monitor .....
8.6 BASIC Monitor Commands
+ 8-2
. 8-3
. 8-5
- 8-9
Chapter 9 MZ-700 Mode
9.1 Using MZ-700 Programs
9.2 Summary of MZ-700 BASIC Commands and Statements,
Functions and Operations
Appendixes
Appendix A Display Control in the MZ-800 Mode
Programmable Sound Generator . . A-7
Reserved Words, scsssisossisrsesse
Restrictions on Using File 1/O Commands and Statements .A-13
Monitor Subroutines... - A-l4
Making Backup Copy of the BASIC Interpreter
Optional Colour Plotter-Printer MZ-1P16
Colour Plotter-Printer Control Codes
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Error Messages Generated by the Monito!
Error Messages Generated by BASIC
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Specification ..

Chapter 1 Introduction

This chapter describes how to handle and set up the MZ-800 computer system. Read this chapter carefully
before turning on the power switch.
1.1 Unpacking
Remove the MZ-800 from the packing carton and check that you have the following items.
Cassette (containing the MZ-800
BASIC interpreter program,
a demonstration program for
the MZ-800 BASIC interpreter,
the MZ-700 BASIC interpreter,
and demonstration programs for
the MZ-700 BASIC interpreter)
ES;
Owner's manual (this manual)
Computer
> Definable key label
Store the carton and packing materials away in a safe place, so that you can reuse them if you have
to transport the computer in the future,
1-2

1.2 Handling
1) This computer uses many precision parts. Do not use or store it in extremely hot or cold condi-
tions, or under conditions where the temperature changes rapidly.
2) Do not use or store the computer in damp or dusty places, and avoid exposing it to corrosive chem-
icals or gases.
3) Do not block the ventilation holes or place large objects nearby that will disrupt ventilation.
4) Do not subject the computer to shock or vibration.
5) Do not expose the computer to direct sunlight.
6) Do not allow water or other liquid to enter the cabinet. Using the computer when it is wet is very
dangerous, and will damage the computer’s electronics.
7) Do not disassemble the cabinet unless you are installing options as instructed by documents from
SHARP.
8) Radios and TV sets may pick up interference from RF (radio frequency) noise generated by the
computer. Keep such equipment (other than that you may be using as the computer’s display unit)
well away from the computer.
9) When peripheral devices are connected, the display image may jitter. If this problem occurs, change
the layout of your system’s equipment.
10) Do not place any object other than the optional plotter/printer (MZ-1P16) on the cabinet.
11) After turning off the power switch, unplug the power cable by grasping the plug molding, not
the cable.
12) Make sure that you turn off the power switch when you not using the computer. After turning
off the power switch, wait at least 10 seconds before turning it on again, otherwise the system
may not operate properly.
13) Use a dry soft cloth to clean the unit. Do not use a wet cloth or volatile fluids such as alcohol
or benzene. Discolouration or deformation of the cabinet may result if this precaution is ignored.
14) If you notice any abnormal condition such as an extremely high temperature, an abnormal odour,
or smoke, stop what you are doing and quickly turn off the power then unplug the power cable.
MZ-811 and MZ-821
One of the models described in this manual may not be available in some countries.
This manual explains two personal computer models: the MZ-811 and the MZ-821. Differences
between these two computers are as follows.
Model name | MZ-811 MZ-821
|
Data recorder | Optional Standard
|
Not connectable
Ordinary cassette recorder | Connectable
When the optional MZ-1T04 data recorder is installed on the MZ-811, it becomes equivalent
to the MZ-821. Procedures for installing the data recorder are described in the MZ-1T04 in-
struction manual.
The explanations in this manual are based on the MZ-821.
However, the explanations on pages 7-3 and 7-18 apply only to the MZ-811.