Sinclair ZX80 / ZX81 Forums

Works well on Chrome 37

I noticed:
* it loads with a black screen. The Reset button starts the ZX81
* the keyboard backspace key is not mapped to the Rubout key
* the edit line moves to the top of the screen at times, but seems to recover by itself

Progress on IE8 -- it now shows a keyboard and buttons for start, stop, reset, etc. Message: Object doesn't support this property or method Line: 12 Char: 2 Code: 0 URI: http://rullf2.xs4all.nl/jszeddy/canvas2image.js Message: Object doesn't support this property or method Line: 145 Char: 2 Code: 0 ...

Perhaps so. Prism Microproducts was the sole distributor of the ZX81 in Britain to small retail organisations with fewer than 20 outlets. They also published Sinclair User magazine. http://wikipcpedia.com/wiki/the-second-wave-as-pcs-abound/through-a-prism-%E2%80%93-sinclair-distribution/ http://www....

With IE 8 I know see a ZX keyboard!


But only briefly before

Message: Object doesn't support this property or method
Line: 12
Char: 2
Code: 0
URI: http://rullf2.xs4all.nl/jszeddy/canvas2image.js

Message: Object required
Line: 157
Char: 5
Code: 0
URI: http://rullf2.xs4all.nl/jszeddy/jszeddy.html

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...