Sore ARONIJA

č CONTENTS
INTROGUCTION
LOADING THE SPECTRUM MONITOR
ACCESS TO SPECTRUM MONITOR -
PROMPT AND CURSOR'
COMMAND MODES
M — Memory Location
— Escape SM
— Insert
— Delete
— Area Relocate
- Fill
— Return
Breakpoint
- Jump 8x Execute
-- Break Restore ZAJ
- Register Display ša
— Breakpoint Continue
— Printer
— String Entry
Z -- Disassembler
N — Number Conversion
THE MONITOR IN PRACTICE
APPENDICES:"
A — CPU Regišter Data Byte

AVODA-U<NPO—- Xx
1

NNN ad a O za m ob od zb

25

B - Summary of Commands % Forras 26

Copyright 1982 by Picturesgue"'

All righte reserved. This book and the Di
šecompanying Computer program are
copyright. No part of either this book or
the accotapanying computer program may
be reproduced, copied, [ent, hired, or
transmitved by sny means without the
prior written consent of the publishers.

Published by:
Picturesaue,

6 Corkserew Hit, >

West Wickham,
Kent BR4 9BB.

OGOSSUBAONNA

INTRODUCTION
The SPECTRUM MONITOR isa machine code entry and de-bug

monitor utility, with comprehentive facilities including a
Disassemler, that has been designed to allow the ZX Spectrum
Computer to be programmed in machine code, without the need to
Use any Basic commands.

User! in conjunetion with one of the many books available that

'teach the principles and practice cf Machine code programming, the .

Spectrum MONITOR is an ideal learning tool for the beginner.

For the more experienced user, the Spectrum MONITOR offers the
commands necessary for successful Machine code programming snd
da-bugging. ;

The MONITOR allows a free interehange with Basic, and has been
carefuliy structured so that machine code routines can bo run from
either Basic or from,the MONITOR, and that the MONITOR can be
Bccessed at any time without upsetting the stock. All kčyboard
entries are validated, and it is impossible to crash the Spectrum
while using the MONITOR comrmands.

The program cassette that accompanies this book contains two
versions of the MONITOR; one for the 18K Spectrum and one for
the 4SK Spectrum. (f you own a 48K machine, yOu can use eithar
version. DEGNI

THE SPECTRUM MONITOR Occupies just over 4K of memory st
tha top of memory and is not relocatable. On loading into your
Spectrum, Ramtop is avtomatically reset to below the MONITOR,
and shovid only be altered downwards. in other words, assumin$
YCu use the correct version for the 'nemory size your Spectrum
contains, you can lower Ramtop further to Create space for your
own machine code programs if you wish, but the MONITOR uses
the 4K of memory immediately below the start of the User
Dofinable Graphics area of RAM. [ you !oad the 18K version into
a 48X Spectrum, you can use the memory above the MONITOR but
1 you move Ramtop above the MONITOR, you may run the risk of
corrupting the MONITOR routines with Basic commands.

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