CATS Library Tape 9

Shows plots of trig functions in relation to quadrants.

Three SCREEN$ chained together to demonstrate graphics possibilities.

Another (faster) routine for plotting functions.

Rotates 3 plotted screens of pictures.

An animation routine that rotates 4 screens of exponent plots.

Graphic demo, plots a sine wave vertically.

RLE en/decoder.

From Roy Myer’s book Microcomputer Graphics.

Rotating images of plotted cosine functions.

A morphing 3D saddle-cosine surface rendered with perspective projection, using Z80 LDIR machine code to page display-file snapshots in and out of RAM.

A bug in your BASIC. Variation on Sprite, but adds a rotating display of amusing copyright messages.