Search found 10 matches

by Spinnetti
Tue Sep 29, 2020 8:27 pm
Forum: Development
Topic: "Extreme" 1k programs for ZX80 and ZX81: starter kit
Replies: 15
Views: 14930

Re: "Extreme" 1k programs for ZX80 and ZX81: starter kit

IOS emulator is cool! Happy to contribute our "Zonkey Kong" to it when we have it done (by end of Oct I think?)
by Spinnetti
Mon Sep 28, 2020 7:07 pm
Forum: Development
Topic: What am I missing? - Calling RND from assembly.
Replies: 11
Views: 6333

Re: What am I missing? - Calling RND from assembly.

Thanks.. debugging the elevator. I've got variables for both elevator and player, so rather than do in either move routine, this runs and does a compare on both variables. The player rides up, but stops early. Not sure why yet. When we have this in the can, I want to try my hand at hirez Robotron.
by Spinnetti
Sun Sep 27, 2020 10:03 pm
Forum: Development
Topic: What am I missing? - Calling RND from assembly.
Replies: 11
Views: 6333

Re: What am I missing? - Calling RND from assembly.

Thanks! That 1k Hi rez example is great - game premise is good too! Next thing I'd like to learn, if ya'll are willing to guide or example is how to do an object array. I'm assuming this is the best way to track multiple objects, and move them? In our Donkey Kong example (Zonkey Kong as we call it)....
by Spinnetti
Sat Sep 26, 2020 9:57 pm
Forum: WANTED
Topic: Speccy in good cosmetic condition? (USA)
Replies: 0
Views: 7080

Speccy in good cosmetic condition? (USA)

I don't need it working, just would like a pretty one for the shelf. I dreamed of one as a kid, but they weren't sold here. Would like a nice looking one for the shelf - I'm in line for a NEXT in KS2!

TIA
by Spinnetti
Sat Sep 26, 2020 9:54 pm
Forum: Development
Topic: What am I missing? - Calling RND from assembly.
Replies: 11
Views: 6333

Re: What am I missing? - Calling RND from assembly.

Thanks Will do... - Where's the "new games" topic? Managed to get things working by moving the code around a little and just using the LD A,R and masking bits. Not toooo bad. Will def. check out other examples as I'll need better methods at some point. The result of all this will be a reasonable int...
by Spinnetti
Thu Sep 24, 2020 2:56 am
Forum: Development
Topic: What am I missing? - Calling RND from assembly.
Replies: 11
Views: 6333

Re: What am I missing? - Calling RND from assembly.

Thanks... still getting same value if I call it in near succession. If I call further apart in the code it work fine though. Hmm.
by Spinnetti
Tue Sep 22, 2020 4:54 am
Forum: Development
Topic: What am I missing? - Calling RND from assembly.
Replies: 11
Views: 6333

What am I missing? - Calling RND from assembly.

So, I want to something very simple. I want a random int from 1-3 on the ZX-81 - In basic it might look like (RND *3)+1 - In Assembler, My understanding is would do this: - LD HL,$03 - CALL $0BED - LD A,L Then A would have my number in it. I've tried other methods like - or others using R: LD A,R LD...
by Spinnetti
Mon Sep 21, 2020 4:41 am
Forum: Development
Topic: Convert a .jpg or .png whatever to a BW ZX image?
Replies: 5
Views: 4067

Re: Convert a .jpg or .png whatever to a BW ZX image?

Thanks, that helps..

Ultimately, I just want the hex codes that I can use to map onto the screen from assembly as an opening screen for a game we did for the zx-81. Just finishing up what we started 37 years ago, then will move on to some Spectrum Next programming :)
by Spinnetti
Fri Sep 18, 2020 12:04 am
Forum: Development
Topic: Convert a .jpg or .png whatever to a BW ZX image?
Replies: 5
Views: 4067

Convert a .jpg or .png whatever to a BW ZX image?

Hi,

I'm looking to create splash screen for a game me and a buddy did, and our art skills aren't great. Is there any sort of utility that will take a picture and turn it into a BW ZX compatible screen that we can grab the hex codes for?

Thanks!
by Spinnetti
Tue Sep 15, 2020 2:39 am
Forum: Emulators
Topic: New release of EightyOne available
Replies: 184
Views: 98213

Re: New release of EightyOne available

Hi, just wanted to say thanks for this... I've used it on and off for many years. As I get geared up to start programming on my new Sinclair Next whenever KS2 fullfills, I've been working to finish up a project me and a buddy started in 83' and still haven't quite finished - Donkey Kong. Yeah, its b...