A bit of rotating in Color BASIC

0 REM BITROTATE.BAS
10 DIM BT(7):FOR BT=0 TO 7:BT(BT)=2^BT:NEXT
20 INPUT "VALUE ";V
30 PRINT "L OR R? ";
40 A$=INKEY$:IF A$="" THEN 40
50 IF A$="L" THEN M=0:PRINT "LEFT":GOTO 90
60 IF A$="R" THEN M=1:PRINT "RIGHT":GOTO 90
80 SOUND 1,1:GOTO 40
90 REM
100 PRINT:PRINT " ";:Z=V:GOSUB 500
105 FOR I=1 TO 8
110 IF M=0 THEN PRINT "LEFT ";:NZ=V*2:IF Z AND 128 THEN Z=(NZ OR 1) AND 255 ELSE Z=NZ
120 IF M=1 THEN PRINT "RIGHT ";:NZ=V/2:IF Z AND 1 THEN Z=NZ OR 128 ELSE Z=NZ
140 GOSUB 500:V=Z:NEXT
150 PRINT:GOTO 20
500 REM SHOW Z AS BINARY
510 FOR BT=7 TO 0 STEP-1
520 IF Z AND BT(BT) THEN PRINT "1"; ELSE PRINT "0";
530 NEXT
540 PRINT:RETURN

[@rockyhill3]

You can always -call on this channel for a -bit of good information, just dial the length of the video.

[@GORF_EMPIRE]

Nice!

[@allenhuffman]

And now all my “recorded one evening in a hotel in Illinois” videos have been posted.

[@GORF_EMPIRE]

@@allenhuffman What will you do next?

[@allenhuffman]

I know how to handle 16-bit values, so I at least need to do one on that.

[@GORF_EMPIRE]

@@allenhuffman Perhaps how to call machine language subroutines? Then you can show how to use ASL, ASR, ROL and ROR and get those shifts and rotates done in a few cycles instead of 100's.