------------------------------------------------------------------------------ INFO about the ZX81 programmes (.P) supplied with XTricator & XTender Compilation & Descriptions (c) by Carlo Delhez, November 1991. ------------------------------------------------------------------------------ ASTRCONV * Astral Convoy by C. Panayi, Vortex Software, 1982 * space/shooting game, machine coded * protect your space convoy by destroying the alien attack ships, while avoiding alien space mines * named player, pleasantly scrolling screen * steering: instructed * requires copy of ZX81 font table (address $1E00) to be present at address $3E00 also * exit when name is requested by STOP BREAKOUT * BreakOut, author unknown, undated * ball game, machine coded * bounce the ball back with your bat to destroy the bricks of the wall in front of you * variable speed, up to 9 balls, 2 skill levels * steering: instructed * exit when speed/balls/level is requested by STOP BUGBURST * BugBurst by Hogroprog, undated * pacman-alike game, combined Basic & machine code * extinguish the flashing objects but watch out for the bugs dancing around you * interesting animation, 15 screens, demo mode * steering: instructed * many delays before game starts; wait patiently * exit any time using Break CBI * Coral Basic Interpreter version 7.0 by Carlo Delhez, 1987 * extension of ZX81 basic and editor, machine coded * type POKE 16388,8 \ POKE 16389,107 \ NEW before loading * when being started with RAND USR 27400, useful commands to type are NOSTALGIC OFF \ ERR MSGS ON * pseudo screen editor, no tokens but full typing * many new commands available, e.g. for structured loops, procedures, renumbering, indentation, graphics, debugging and machine code utilities; manual available on request * user-friendly syntax check returns cursor near error * exit by typing EXIT or NEW CBI-DEMO * Coral Basic Interpreter Demo by Carlo Delhez, 1987 * demonstrates some features of CBI, in Basic and machine code * load programme only when CBI is active (otherwise error C) * demo is mainly intended for studying the new features of CBI, not as a serious toolbox CLCKFREQ * Clockfrequency by Carlo Delhez, October 1991 * benchmark programme to determine effective processor speed * does some simple printing and plotting and counts the number of frames needed; this is compared to the original ZX81; the result gives a rather good indication of emulator speed * requires Frames to be emulated (OK on XTender, XTricator) DEMOLITN * Demolition by Dr. David P. Nowotnik, Phipps Associates, January 1982 * ball game, combined Basic & machine code * launch oscillating balls in order to destroy the bricks of a wall before it reaches the top of the screen * a simple yet original variation of breakout * steering: instructed * exit any time using Break DISASS * Disassembler by Campbell Systems, undated * simple yet sufficient, combined Basic and machine code * decimal addresses, hexadecimal dump, decimal disassembly * generates non-standard Z80 mnemonics sometimes * instructions given in load screen EB2-DEMO * Extended Basic Level 2 Demo by Frits Beniest, 1983 * demonstration of REM-based ZX81 basic extension, combination of Basic and machine code * the use of Fill, In/Out, Read, Data, Cls, Draw/Undraw, Scroll, Circle and many more are shown * Dutch texts * exit any time using Break FROGGER * Frogger by Cornsoft, undated * evasive game, machine coded * guide the frog through heavy traffic and over a river with floating tree trunks to his homes * 1 or 2 players, 5 skill levels, nice graphics * steering: A/Z = up/down N/M = left/right ; note: non-repetitive! * no official exit GASMODEL * Gasmodel by Ch. Zwirschke, March 1983 * simulates kinetics of a gas, machine coded * using diffuse reflections and collisions, the kinetic behaviour of the molecules of a gas in a closed box is simulated * speed of the molecules can be varied * programme text in German * exit any time using Break GAUNTLET * Gauntlet by Colourmatic Computing, 1982 * shooting game (scramble), machine coded * move your ship through the caverns and try to destroy the enemy installations while avoiding their projectiles * 1 or 2 players, 6 phases, very smooth scrolling * steering: instructed * processor frequency independent operating speed * exit at one of the intro pages by Break GUZZLERS * Guzzlers by DataBase, undated * pacman game, machine coded * eat the pills, but look out for the ghosts; you can eat the ghosts after having taken one of the special pills * up to 4 players, 3 choices for number of lives (Oh-Shits) * steering: instructed * ignore the message `please stop the tape' (small delay) * no official exit KRZYKONG * Krazy Kong by C.P.Cullen, Personal Software Services, undated * * no offical exit LA-PULGA * La Pulga by Paco Suarez, Indescomp, undated * highly original jumping flea game, machine coded * a flea at ground-level has to reach the finish (`meta') at high altitude by jumping from obstacle to obstacle; the flea can only jump left or right at a 45 degree angle, but with variable speed * 5 courses, 3 levels of play, modification of course * steering: instructed * exit at the main menu by Break PANEL * ZX-Panel, author unknown, undated * Handy and compact memory toolkit (3.5k), machine coded * When LOADed it puts itself at address 29126 above RAMtop and gives a NEW. The programme is started by typing RAND USR 29126. You get a hex memory map around address 0. Using Enter and Arrow Up you can walk through memory, using Arrow Down you can walk through registerpairs. At the prompt you can type a hexadecimal number, which is poked at the current address. The number can be 1 or more bytes long. If the first character is a full stop (`.') you can pass a command. Available commands are: .0 = set new current address .1 = copy block of memory .2 = execute programme .3 = fill block of memory .4 = set breakpoint .5 = character dump (use e.g. keys 1, 2 and 5) .6 = exit panel .7 = alter current registerpair In all cases, type addresses with four hex digits and data with two hex digits. QUADRAT * Quadrat, author unknown, undated * Solves second order polynomes with rational coefficients, Basic * Type the coeffients A, B and C of the polynome in the form (numerator)/(denominator); the solution(s) (if any) and the extremum are printed * text in German RED-ANTS * Red Ants by Carlo Delhez, August 1984 * maze game, machine coded * walk through the giant ants nest, eating their eggs and meanwhile looking out not to get stung by an ant * vast maze, special steady-player screen scrolling * steering: instructed * exit during title page by Break SCRAMBLE * Scramble, author unknown, undated * shooting game, machine coded * your ship can be moved in 8 directions through underground galleries in order to bomb and fire at the enemy installations and to avoid obstacles, missiles or flying bombs * 1 or 9 lives * steering: instructed * exit when the number of lives is requested by Break SCRMBL81 * Scramble-81, author unknown, undated * shooting game, machine coded * description same as `SCRAMBLE', see there * 3 lives, smooth graphics * steering: instructed * exit at instruction page by Break YAHTZEE * Yahtzee by Carlo Delhez, September 1983 * dice game, Basic * fill your Yahtzee sheet by trying to throw the right combinations of dice; rules of Yahtzee not included * up to 20 players, Dutch text, sorted scores * exit any time using Break <*** End of File ***>