Naval defense game in which you are the surface vessel. Play choices are “Attack Level,” “Ocean Depth,” and “Visibility.” An enemy submarine and aircraft are attacking you with torpedoes and bombs. You fight back with depth charges and antiaircraft guns. 16K.
Display manager and data filing program in machine code. Provides a full screen editor for a direct keyboard-to- screen link with full editing and plotting features. Filing and display facilities permit page-flip animation or horizontal or vertical scrolling through windows. Stores up to 99 screens in 64K.
Four programs: Billboard: Scrolls a giant banner across the screen. Etch-a- Screen: Draws text and graphics in any direction. Checkbook Balancer: Keeps a running tabulation of your balance. Composer: Plays music as you press the keys. Manual, 2 keyboard overlays in color. 1K.
ZX81 Home Computer Package Read More »
Circuit to invert video signal (white on black); fits inside computer. Switch to select normal or inverted video.
ZX81 Video Inverter Read More »
Psychoanalysis by Computer? Not quite, but Dr. Floyd will carry on a conversation with you using psychoanalytic techniques, giving the appearance of artificial intelligence.
Five programs for drawing pictures. Two produce “pop” art, two produce line drawings and the last is a “complete screen formatter.” 16K.
