Sinclair ZX80 / ZX81 / Z88 Forums

I wonder if the problem with Android Browser is that the soft keyboard by design does not appear unless focus is set to an input element. In Internet Explorer 8 the error is: Message: Object doesn't support this property or method Line: 18 Char: 2 Code: 0 URI: http://rullf2.xs4all.nl/jszeddy/zeddy.js

My ZX81 purchased in kit form back in the day (1981?) was the same. Channel 2/3 switch included.

Is it a ZX81 emulator that runs in JavaScript?

With Android Browser I see some register boxes flashing, and eventually a K prompt, but there does not appear any way to enter commands.
With IE 8, I see only the register boxes and a script error.

6.3 most importantly fixes the graphics codes. Both translation and presentation. (Will use the Sinclair font if it is installed on your PC). Attached to the first post of the this topic . This runs on Windows (including Windows XP, Windows 7 and Windows 8). zxlist63.JPG Changes: * corrected graphic...

The Goodbye routine uses standard graphics characters placed in REM 8.

I wonder how he originally created this text -- with a special tool, or simply by trial-and-error on a the ZX81 keyboard?

Froggie (1983) has some interesting code -- and is a topnotch ZX81 game too. Froggie (1983) by Richard Braunton * Transitions between screens. Simple code, but very effective. See sample code in Transition Effects Code * Press A Key prompt animation screen at USR 22477 press-a-key.JPG * Goodbye disp...

Runs on UNIX-type systems including Mac and Linux. Looks like an update to the topic ZX80/81/Spectrum emulator for Unix

While analyzing an old game, I came across two interesting screen-wipe effects. I call them TRANSITION_CLOSE and TRANSITION_OPEN. * demo program is attached (TRANSITIONS.p) * assembly language source code in ZX-IDE format is attached (TRANSITIONS.asm) The machine code was found in Froggie 1983 by Ri...

Many of the old games and programs used something like this:

A simple variation that can be made to the Assembly Language is to change the Keys used by the game from From S, D, K, L to the arrow keys v, <, > Change these lines cp 030h ;left (k) ... cp 031h ;right (l) ... cp 029h ;drop (d) to cp 21h ;left (5 "<-"") ... cp 24h ;right(8 "->"") ... cp 22h ;drop (...