Sharp MZ-80B Manuale utente

Personal Computer

lllZ·OOrnJ

MONITOR

SB-1510

REFERENCE

MANUAL

SHARP

•

SHARP

Personal

Computer

MZ-808

Monitor

SB-1510 Reference

Manual

january

1981

080231-150281

Printed

Japan

©SHARP

CORPORATION

NOTICE

This manual

applicable

the

MONITOR

S8-1510

system software used with

the

SHARP

808

Personal Computer. The

808

general-purpose personal

computer

supported by system software which

filed

software packs (cassettes and diskettes).

All

system software

subject

revision

without

prior notice; therefore, you are

requested

pay special

attention

their file version numbers.

This manual has been carefully prepared and checked

for

completeness, accuracy and

clarity. However,

the

event

that

you

should notice any errors or ambiguities, please feel

free

contact

your

local Sharp representative

for

clarification.

All

system software packs provided

for

the

MZ-808 are original products, and all rights

are reserved. No portion

any system software pack may be copied

without

approval

the

Sharp Corporation.

Introduction

This manual describes commands and subroutines

standard system software MONITOR

SB-151

for

the

Sharp MZ-80B and procedures

for

coding machine language programs and generating data.

MONITOR SB-1510

part

the system software for the MZ-80B and it acts mainly as

the

moni-

tor

program for BASIC

SB-5

510, DISK BASIC SB-651 0 and Double Precision DISK BASIC SB-671 0.

Further, MONITOR SB-1510 can be used

a machine language

monitor

transferring system con-

trol

it. With this feature,

you

can

not

only code and debug machine language programs

but

also

generate system programs

your

own.

This manual includes all MONITOR SB-1510 assembly listings for reference.

iii

•.,

Contents

Notice

....

......

....

.........

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

....

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

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

.......

.....

iii

Chapter 1 MONITOR SB-1510 Commands and Subroutines

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

1.1

Function

the

monitor

program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.2 Using

monitor

commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.2.1

1.2.2

1.2.3

1.2.4

1.2.5

1.2.6

M command

.....

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

. 4

D command

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

......

....

J command

...

....

...

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

S command

V command

L command

.......

...

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

....

. 10

.......

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

1.3 Monitor Subroutines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Appendix

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

A.l Mnemonic Codes and Corresponding Object Codes . . . . . . . . . . . . . . . . . . 22

(Mnemonic codes are arranged in alphabetic order.)

A.2 Object Codes and Corresponding Mnemonic Codes

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

...

(Object codes are arranged in hexadecimal order.)

A.3 MONITOR SB-1510 Assembly Listing

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

.....

.. ..

. 42

Chapter 1

MONITOR

SB-1510 Commands and Subroutines

This chapter describes six commands executed

the

monitor

command level and

monitor

sub-

routines enables the user to generate, execute and/or

file

a simple machine language program;

that

is,

to operate the MZ-80B at the

CPU

level. Machine language programs generated can be linked with

other BASICprograms with the USR function

the BASIC language.

1.1

Function

the monitor program

A Monitor program generally monitors system programs such as

the

BASIC interpreter.

The

MZ-

80B uses a Monitor program called MONITOR SB-1510.

includes various functional subroutines

which control

the

keyboard, display, sound circuit, cassette tape deck, etc. These subroutines are

called

the

BASIC interpreter when

executes INPUT statement, SAVE command, MUSIC state-

ment

other

commands

statements. Monitor subroutines may also be called

the

user

will.

$0000

$1220

MONITOR

BASIC

interpreter, etc.

User's program

$FFFF

...._

_______

__,

FIGURE 1.1 Monitor subroutine call

1/0

control: keyboard, CMT, TV, etc.

Return

MONITOR SB-1510 occupies 4.5K bytes

memory

and

is stored in memory addresses

$0000

through $121F. Its required work area is included within this area. Therefore, MONITOR SB-1510

can be used as an individual system program.

That

is, it can perform the following functions in addi-

tion

system monitoring.

•

generates, executes and files machine language programs using 6

monitor

commands:

Memory correction

Memory

dump

Jump

s -save

Verify

Load

• Since MONITOR SB-1510

stored in RAM, its contents may be varied with commands.

For

example, the contents

$0000-

$0038 and $0066, which are called when processing an inter-

rupt, can be changed at will

the

function

a monitor subroutine can be modified.

Programs may be freely written

cassette tape,

a machine language program including MONI-

TOR SB-1510 can

filed for future use. See

the

assembly listing for MONITOR SB-1510 in Ap-

pendix A.3.

To use monitor commands, system control must be transferred

the Monitor from the BASIC

interpreter

other

system program.

• To transfer system control from the BASIC interpreter

the

Monitor, execute a

MON

command.

• To transfer system control from

the

Assembler

Linkert

the Monitor, execute a ! command.

•

transfer system control from

the

PASCAL

interpretertt

the Monitor, execute

editor _

command,

Q/.

FIGURE 1.2 shows a display flame when a BASIC command

MON

executed. After the

MON

command has been executed, the cursor moves to the next line, an asterisk at the beginning

the new

line and the cursor flickers to inform the operator

that

system control has been transferred

the

Monitor.

FIGURE

1.2 Execution

BASIC

command

MON

tt.

Refer

the Assembler, Linker and PASCAL interpreter manuals.

1.2

Using

monitor commands

General conventions for use

Monitor commands are as follows:

• Commands and data are

input

from

the

keyboard with

the

I CR ] key pressed

conclude

the

entry.

• Data display and

input

are in hexadecimal. One

byte

data consists

two

hexadecimal digits

and an address consists

four hexadecimal digits.

• When

the

number

characters

input

firm

the

keyboard exceeds

the

number

the

required

the

Monitor program,

the

excess are ignored.

•

cancel execution

a command, press

the

IBREAK] key.

• Every command can access any memory location, allowing a wide range

applications,

but

spe-

ci~l

care must

taken

not

destroy required data

a program.

1.2.1 M command·

Function

Operation

Corrects

the

contents

the

specified memory address.

When

command is entered,

the

display is as shown in FIGURE 1.3.

FIGURE 1.3

this case,

the

Monitor requests

the

operator

enter

the

address

which mem-

ory correction

start.

For

example, let memory correction start

memory address $70AO.

Enter

70AO

from

the

keyboard,

then

press

the

[

] key. The display is as shown in FIGURE

1.4.

FIGURE

1.4

The

monitor

program displays

the

contents, $00,

memory address $70AO and

requests

the

operator

determine whether or

not

the

contents

of$

70AO

are

corrected.

correct them,

enter

two hexadecimal digits, from

FF,

the

cursor position from

the

keyboard.

For

example,

change

the

contents

$70AO

from $00

$C9 (operation code

the

RET command),

enter

"C9",

then

press

the

[

] key.

The

monitor

program

then

corrects

the

contents

the

memory address and

the

display is as shown in FIGURE 1.5.

FIGURE

1.5

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