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4.2 Dr. LOGO
Dr LOGO is a thoughtful implementation of Logo which has been specially
customised for the AMSTRAD CPC464, to make it even easier to program.
Extensions have been included to make available the powerful sound facilities of the
CPC464 and program editing is made easy by the inclusion of the cursor key cluster.
4.3 Getting Started
To operate Dr. Logo, insert a copy of SIDE 2 of your master disc into the disc drive.
(The Foundation Course contains instructions on how to copy the master disc.)
Press the [CTRL], [SHIFT] and [ESC] keys simultaneously to reset the computer.
Type in |CPM [ENTER] and LOGO will load automatically.
The following Dr. Logo wake-up message will be displayed on your monitor:
Welcome to
Amstrad LOGO V1.1
Copyright (c) 198314, Digital Research
Pacific Grove, California
Dr.Logo is a trademark of Digital Research
Please Wait
This greeting will soon disappear and a question mark prompt ? will appear on your
screen.
The question mark tells you that Dr.Logo is waiting for you to type something at your
keyboard.
4.4 FIRST STEPS
Try typing in (using lower case letters): fd 60[ENTER]
and you will see a turtle appear which then moves forward 60 units leaving a line
behind it from where it started to where it finished. The screen will clear giving a large
graphics area and a smaller text area with the ? prompt near the bottom of the screen.
Dr. Logo will often decide to re-arrange the screen so as to give either a large text area
or large graphics area, for your convenience.
Type in rt 90[ENTER] and the turtle will move 90 degrees to the right. (From now
on we will assume that you press the [ENTER] key after every line of command.)
Now type in fd 60 and another line will be drawn the same length and at right angles
to the first line.
Experiment with the simple instructions fd , bk (short for back), rt and lt (short for
left) to see what happens on the screen.
AMSTRAD Disc Drive & Interface DDI-1 Manual Chapter 4.2