Personal Computer News

5th January 1985
Apple Orchard

 
Author: William Prew
Published in Personal Computer News #093

Fill your three applecarts with fruit in William Prew's fast-action game. Instructions are in the program.

Apple Orchard

Fill your three applecarts with fruit in William Prew's fast-action game. Instructions are in the program.

In Apple Orchard you are engaged in a desperate mission to save as many apples as possible before the arrival of a hurricane. So if you didn't know it was Be Kind to Defenceless Fruit Week, you do now...

Fortunately, you're mechanised - you have thre buggies that you use to tear round your orchard. But the local vandals have scattered tacks arounds, so you also have to avoid crashing, and fuel is limited, so watch the gauge.

Program Notes

10-40 REM statements
60-80 Assembler to disable the Escape key
90 DIMension arrays for hall of fame and reserves space for the assembler routine which is at the end of the program
100 MODE 7. Calls up the Assembler routine
110-130 Calls instructions and the PROCedure which defines the user-definable characters, and the PROCedure which displays them
150-280 Game's main loop. Sets up screen and initialises the variables
300-410 PROCedure which handles the buggy and score, etc
430-460 Delay loop embedded in a PROCedure which in turn passes a parameter to the loop.
480-680 Scans keyboard and takes appropriate action when a key is pressed. Checks position of buggy and sets up boundaries for it
700-950 Sets up screen, plots apples, etc
970-1030 Defines some variables
1090-1120 Prints how many lives you have left
1140-1230 PROCedure which handles death
1250-1340 PROCedure which handles everything when an orchard is cleared, i.e. resetting variables and so on
1360-1440 PROCedure which is called up when the player has ruined all the buggies
1460-1490 See 2850-2940
1510-1690 Defines characters and envelopes for the sound effects
1710-1750 Filling the arrays with data for the hall of fame
1770-1860 Displays characters
1880-2070 Name entry routine. An OSWORD call is made with the accumulator set to zero. This method is also used by Acornsoft, etc
2090-2220 Hall of fame
2240-2490 Instructions
2510-2560 Space bar routine
2580-2640 On/Off sound routines
2660-2680 Freeze routine
2700-2730 Updating of number of apples collected
2750-2830 Music routine
2850-2940 An Assembler routine which returns the ASCII code of the character at the cursor position. It makes an OSBYTE call with the accumulator set to 135. It also uses the only Function

William Prew

This article was converted to a web page from the following pages of Personal Computer News #093.

Personal Computer News #093 scan of page 14

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Personal Computer News #093 scan of page 15

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