Sinclair ZX80 / ZX81 / Z88 Forums

What better days than writing explanations of the games and making a ZIP-file than Christmas.

Working on it. Plan to be ready before newyearsday.

After 35 years of course there's no rush, thanks for the reply and I shall poll here or on the app store for news of the update, whenever. You're welcome to bundle my little 'Shop Steward' game as a ZX80 example as long as you include a link to my page with related notes http://simon.mooli.org.uk/A...

Or use a copy program.

Not too hard to make such a program.
All you need is a copy of the loader where you skip the actual writing to memory.
At the end a checkbyte is read from tape which is calculated. The legendary checkbyte from
R : Tape Loading error

Since I used Blocky-method as base I used the Blocky-source as a start.

Blocky has score at the bottom, but now on top so I can simply add the turbulence-effect.
This is just a 1 byte changing in the current hires display for several screenupdates.

298 bytes sofar...

The size of the screenmemory might be brought back to/with app. 3K with a different display method. I had thought that udg mode might work a little more effectively memory wise. At the moment adding any more code slowly eats from the bottom up into the wrx screen. Other than that I guess it's a tri...

I was even thinking of an altered display from my 1K hires game SPY vs SPY.
This is not pixelperfect, but would work too.

The size of the screenmemory might be brought back to/with app. 3K with a different display method.

With bitwise shifting you are almost at topspeed when you start the game. I want to add gameplay over technical achievement so I tested byteswise movement in x-direction (y-direction will always be bitwise in Blocky-method. This give so much potential in speed (slow on start speedier on progress) an...

Screendisplay is like Blocky. First temporary screen already made.

First test on speed of bitwise shifting.

I thought it would be too slow, but the ZX81 is fast enough for it.