**** COMMODORE 64 BASIC V2 **** 64K RAM SYSTEM 38911 BASIC BYTES FREE READY. LOAD "NOTES",8,1 SEARCHING FOR NOTES LOADING READY. LIST

MY C64 PROJECTS

IDEAS & CODE SNIPPETS

SPACE INVADERS CLONE

NEED TO DESIGN SPRITES (USE SPRITE PAD?)
SIMPLE MOVEMENT LOGIC (JOYSTICK INPUT?)
SOUND EFFECTS (SID CHIP POKES)
HIGH SCORE SAVE TO TAPE/DISK?

TEXT ADVENTURE GAME - "DUNGEON OF DOOM"

MAP OUT ROOMS (GRAPH PAPER!)
WRITE DESCRIPTIONS (ATMOSPHERIC!)
PARSE SIMPLE COMMANDS (GET, GO, USE, LOOK, INV)

BASIC SNIPPETS

Simple Sprite Mover

<span class="code-line">10 POKE 53280,0:POKE 53281,0 ' BORDER/BG BLACK</span>
<span class="code-line">20 POKE 646,1 ' TEXT WHITE</span>
<span class="code-line">30 V=53248: REM SPRITE REGISTERS BASE</span>
<span class="code-line">40 POKE V+21,1: REM ENABLE SPRITE 0</span>
<span class="code-line">50 POKE 2040,10: REM SPRITE DATA POINTER (BLOCK 10)</span>
<span class="code-line">60 POKE V+27,1: REM SPRITE COLOR (WHITE)</span>
<span class="code-line">70 X=150: Y=100</span>
<span class="code-line">80 POKE V,X: POKE V+1,Y</span>
<span class="code-line">90 GET A$: IF A$="" THEN 90</span>
<span class="code-line">100 IF A$="W" THEN Y=Y-1</span>
<span class="code-line">110 IF A$="S" THEN Y=Y+1</span>
<span class="code-line">120 IF A$="A" THEN X=X-1</span>
<span class="code-line">130 IF A$="D" THEN X=X+1</span>
<span class="code-line">140 GOTO 80</span>

Color Cycle

<span class="code-line">10 FOR I=0 TO 15</span>
<span class="code-line">20 POKE 53281,I: REM CHANGE BACKGROUND COLOR</span>
<span class="code-line">30 FOR J=1 TO 100: NEXT J: REM DELAY</span>
<span class="code-line">40 NEXT I</span>
<span class="code-line">50 GOTO 10</span>

USEFUL POKES

Address	Register	Effect
53280	BORDER COLOR	Screen Border Color
53281	BACKGROUND COL 0	Main Background Color
646	TEXT COLOR	Default Text Color
198	KEY QUEUE LEN	Length of Keyboard Buffer
53265	SPRITE ENABLE	Turn Sprites On/Off

NOTES

REMEMBER PEEK AND POKE FOR SOUND AND GRAPHICS! ACCESSING THE SID CHIP DIRECTLY IS POWERFUL.

SYS 64738 FOR SOFT RESET. DON'T FORGET TO SAVE YOUR WORK!

LOAD "*",8,1 TO LOAD FIRST PROGRAM FROM DISK.

<span class="code-line">10 PRINT CHR$(147);"HELLO STYLEMD!"</span>
<span class="code-line">20 FOR I=1 TO 10: PRINT "COMMODORE 64";: NEXT I</span>
<span class="code-line">30 GOTO 10</span>

THIS IS FUN!

This document was styled using the c64 theme with stylemd. Get the tool here: https://github.com/ddukbg/stylemd

READY.