Apple Logic Board Technical Information PDF herunterladen (Seite 64)

The graphics demonstration programs provided on the Saturn

Systems PASCAL diskette are meant to illustrate the way in which

graphics programs may move graphics to and from the Pseudo—disk.

A. EXECUTING SLIDESHOW:

(The following expects that a boot volume has been prepared

according to instruction in this chapter regarding installation a

Pseudo—disk automatically upon boot up, and sufficient memory

and drives are available.)

1. Boot up a two—drive system using Applel.

2. Place the Saturn Systems PASCAL diskette in drive number 2.

(This is volume #5 under PASCAL)

3. When the Command line prompt appears, type: “X”.

4. In answer to the question “Execute what file?”, type:

“#5:SLIDESHOW”

5. Press the SpacEbar to begin the show, repeated pressing of

of the Escape key will eventually exit the program.

IX. USING THE GRAPHICS PROGRAM:

The graphics program may be run with a single 32K card

installed in slot 0 and a boot diskette set up to install this

as a PASCAL Pseudo—disk.

1. Complete steps one through five listed under USING SLIDE—

SHOW.

2. Answer the question “Execute What File?” by typing: “#5:

GRAPHICS”.

3. As GRAPHICS begins, a single pixel is presented on the

screen and you may have to turn the brightness and contrast

up on your monitor to see it.

4. Holding down the button on Paddle 1, you may draw lines on

the screen using the control knobs on the two paddles. (One

is for horizontal, the other vertical.)

5. When you are quite content with your doodle, you may press

the button on Paddle 0 to watch the contents of the screen

be stored to the Pseudo—disk and return to the screen.

6. The purpose of GRAPHICS is to present a program that may be

easily modified by the user to store graphics generated

within a program to the Pseudo—disk. This is a different

situation than attempting to load a binary file that repre-

sents a “Picture”. This program has been provided (along with

a well—documented text file) solely for its tutorial value.

1 2 ... 59 60 61 62 63 64 65 66 67 68 69 ... 76 77

Keine Kommentare

Apple Logic Board Technical Information Seite 64