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The TRS80 Graphics
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20 CLEAR 30 GOSUB 9+a a animation sequence ansos ASCII BASIC program beginning blinking its eyes BREAK key cat's character codes character set character space CLS:PRINT code number computer animation CONTROL ROUTINE 105 current position DATA lines DATA listing delay line displacement value dog's Draw Frame drawing subroutine drawn by calling ENTER key erasing flying saucer function GOTO graphic 191 graphic characters graphic code iNiap iNiap:7 initialization routine keyboard launcher line number line of characters missile motion moving N3Hi o=v N3HT number of characters operations packed PEEK perspective animation pixel plotting PRINT procedure program line 110 Programming for Project random time delay READ AtPRINT ROUTINE 105 CLS screen position segments sensing contact SPACE CREATURE statement Step string variable string-packing subroutine subroutine at line technique tion TRS-80 graphics TTOS TZOS vanishing point vertical video worksheet viva S6T VIVO WlVd WlWd WTWO ZTOS