Sinclair ZX80 / ZX81 / Z88 Forums

WIWO DIDO STANDS FOR?

WALK IN WALK OUT DROP IN DROP OUT

The first WIWO DIDO game is the case of the lost keys. In this game you can drop into fields and drop out of them too.
From the side you can walk in and walk out. : The name WIWO DIDO

WHY WAS TRACERS PARTICIPANT IN THE 2K MINIGAMECOMPO?

THE CODE WAS DELIBERATELY LARGER THAN 1K

I added 1K of textmessage protesting against the winners of earlier years where simple
games of a certain brand which will NOT be named always won the compo.

NAME THE TYPE-IN GAME IN "THE ULTIMATE 1K CODING BOOK"?

BATTLESHIP

Easy one, isn't it?

LD A,(DE) LD L,A LD H,B LD H,(HL) JP (HL) THE OPCODESELECTIONROUTINE OF AN EMULATOR This is the mainroutine in my emulators. SP-2-ZX81 has this code to emulate each possible opcode. This routine is also used in the Galaksija-emulator from Andre Owen on the Sam-Coupe. After years of trying this is th...

WHAT IS NOT A TRICK WITH HIDDEN OPCODES ON THE SCREEN? YOU CAN PLACE AN INVERTED SPACE ON THE SCREEN A hidden opcode will produce a normal space on the screen. YOU CAN FIND A LOCATION ON THE SCREEN This trick is used to display the escapeladders in LODERUNNER YOU CAN STORE INFORMATION ON THE SCREEN ...

You can make an empty screen with just 1 byte: #E9 = JP (HL) You can use the same byte also to shorten a screen. Display a few lines and then end the screen with JP (HL). Does that also mean, that the program is running faster (no more NOPs need to be executed, less time is "wasted" for display)? U...

WHAT NUMBER IS THIS QUIZ IN YOUR LIST OF GAMES?
125

So far I have coded 125 games on the ZX81

There are any emulators and still people create their own emulator.

As long as you have fun in it that is enough reason to do it.

WHICH GAMES PLANNED FOR THE ZX SPECTRUM ENDED ON A ZX81? MINITAURUS AND CALCULUS MAZXIMUS As long as I had a ZX Spectrum I wanted to make a version of these games on the ZX Spectrum. Of both I started some code but both were never finished. In the end the ZX81 was capable of doing what I wanted and ...

Welcome,

so what are you coding at the moment?