Sinclair ZX80 / ZX81 Forums

See enclosed text for info.

Enjoy;

Greg

The author claims over 8000 decimal places in 16K. Presumably more with extended RAM.

Regards;

Greg

From "Syntax" magazine

Here's Frank O'Hara's explanation from "Syntax"

There's a new youtube video of a guy showing the insides of a ZX81..

https://www.youtube.com/watch?v=Vv715KETc0w

It looks to be heavily modified, I was wondering what this mod might be.

Any guesses, looks like it has a substantial heat sink attached.

Regards;

Greg

Here's a general purpose "plug n' play" input routine in BASIC. Fairly snappy for being all BASIC.

Regards;

Greg

Skip frame just makes the display choppy but doesn't do anything for the speed.

Neazoi, the interlace lines can be eliminated by adjusting one of the sliders in the TV emulation window, I forget which one off hand.

Regards;

Greg

If I run this program...

10 PRINT "X";
20 GOTO 10

Speed settings of 1X, 16X and 32X all take about 6 sec. to fill the screen.

Don't worry about it, it can't be that important if no one else has mentioned it.

Maybe it's something in my WIN7 setup.

Regards;

Greg

Just curious, does the speed option in the menu actually do anything? No matter what setting I choose I don't see any noticeable change in speed. It would be nice to have some programming running at Fast and Furious speeds.

Regards;

Greg

A simple "plug 'n play" moving gauge routine in BASIC.

Regards;

Greg