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yupp. i did that when i was 10 on my brand new c64. great memories!

Like a fool, I still turn the volume up. Loving this channel, as a VIC20 man I know what it's like working with such a minimal machine. Kudos to you sir.

Cool!

Why not just LDIR your way through this?

this uh it doesn'tlook solvable

ah yes, my favorite program maz ge e ation byt forev r (youtube why have you recommended me this?)

It could go much faster when i rewrite without using the PrintAt and Print ROM routines.

Very nice and fast 😀

Very impressive, I love programming for the ZX81/ts1000 - I made a Invader demo myself: th-cam.com/video/7zUm6NhBYuA/w-d-xo.html

Thank you for posting, bought back some memories. I had one of those printers with my ZX81, I can remember the smell as it printed what was like a receipt.

I know the blocky gfx dont help but each time the drop a line , couldnt you make the 'invaders' a little bit bigger, give it some tye of 3d perspective? Still great work. might have to get myself a ZX81 because of ur channel. inspired me to fire up my VIC20.

I like how the pirates are so difficult to kill. The flying saucer could be a whale :)

This ironically was easier to code than the arduino space invaders i did some time ago - even though its coded in assembly and not C the zx81 handles the display signal generation

Arrr, great work, matey!

Cool. I think youve already made more software for the poor machine than anyone else has 😢

You do have a flair for nice chunky graphics on the zx81

I'm new to Commodore and you helped me learn a bit more about basic thanks 🙂

This has been interesting. The closest I got to assembler was buying the Amiga Dev Kit way back in the day - it got zero use as I couldn't understand it. Beyond that it was just Purebasic on the PC, which is a pretty cool language. I've been on a retro binge for some time now, I'm 52 and started off on a Pong console thing, then to the Atari 2600 (I knew it as the VCS), C16, Spectrum 128K, Atari 800XL, C64, bunch of Amigas and a Megadrive. Never really got into the newer consoles. Good times though. Great memories. It is so beyond cool these things are still in use by others.

ZX81 "0" and "1" strings look so "binary"

Checkout itch.io (link in description) for the latest updates. In version 1.1 there's now 11 rooms (0 to 10) and the player can start anywhere in the room. The game .p file is now nearly 6Kb so could add a lot more rooms, I really need a room editor to create them quicker.

This is uhh.. interesting

Nice

I could never get my head around this. Basic was easy and today I understand html but this, no, machine code no, even java script today, no

ummm wata sigma

Nice build :) Yap, somethimes stuff from ebay can have faults or issues... Cheers!

That's shitloads better! The platforms only slight dissappear which for a zx81 is wizardry 😅

is it basic or assembly, always found z80 easier than 6502?

im loving this, never owned any ZX computer, always a VIC20 man, It bring backs such nice memorys of programming with limited gfx and memory, KUDOS for these jump videos. keep them coming.

Impressive stuff. Ceetainly a million miles beyond what i can do. Is there no way on the zx81 to walk at the side of the platforms without them disappering though?

Whoa.

Thanks for clearing that up.

Machine Code Sprites and Graphics was my favourite

one day he jumped too high... and never came back down

i can finally jump in the game called jump this is gaming at it's finest

16514 I cannot forget this address...

epic start!

He's jumping for 🍺

Tasty. Is this in 1k?

where can you get the SD card to work with this please? Any idea about the latest firmware?

Thanks for the video. ;-)

Came from Ben heck’s video awesome to see.

When I type it I'm gettin error in line 20, not sure why

Is there no assembler for the Z80? I had one around 1981 for the trs80 color computer. Never heard of using basic to poke an assembly language program.

I learned assembly language to fill the screen. no other way to do it. good stuff.

Mind boggling. Could never get my head around it.

I LOVE MY C64 ❤

This is so much more horrid than asm!

That book changed my life. Thanks for sharing.

Thing is we did use compilers , TRS80 ran the compiler , RS232 uploaded the code to spectrum. Later Especially for Atari / Amega 386/486 Pc where used with cross compilers. As even 16bit was slow at compiling. Rem Statements where really using in Magazines. And as a basic Learning key to Assembler. The Back of the Spectrum Horizon hand book was unique as it had the ascii to Sudo Assembler Language listed in its Index pages. 'ld a,8 ' ld hl,234 'etc so that you could have the 8bit decimal code. Spectrum Assemblers arrived as more RAM become available. But the preferd method outlined above was still sued by software houses.

Gosh that’s painful. The problem really is that back then the tool sets they could provide on the zx81 were limited. So although you assume they typed the rem statement in, they didn’t, they actually wrote it directly in assembler. Nobody actually used that translation set you see in the manual. Yes, as you show it is possible, although extremely painful to type in the character set representing the assembler instruction no programmer did that. If you see the link below, the guy writing this set of videos explains how back in 70’s and 80’s they built their own computers at Marconi Radar Systems In Chelmsford and coded the air traffic control systems for the UK in assembler. He’d be pleased I’m sure to think they had brains the size of planets but he explains how it was done and how to actually build a computer. He shows it being coded in assembler and then compiling that assembler code into machine code and then loading that into memory on the computer. Back then there was no computers no internet so you couldn’t google a solution and you had to build your own and work it out yourself. The Zilog chip was used by Marconi also, and in Rochester in Kent in the British Aerospace factory in the 80’s they used the zilog microprocessor to build a computer rather than the 8086 and that computer they build was coded for submarine hunting. Here the code for the Zilog was written not in Assembler but a high level language called Coral 66, this was then compiled into machine code and then loaded into memory of the Zilog computer they designed. On the zx81 it would have been coded in assembler and not done via the rem and character representation as that’s just too convoluted, and hard to do. As you show it can be done that way, but they just wanted to provide some mechanism using what was available on the zx81 at the time to show how this character representation could be used to create assembler, but in reality it was coded directly in assembler th-cam.com/video/tOkGg0UEm9w/w-d-xo.htmlsi=9PcEQ9frNw2-Mrew