Search found 50 matches

by Bean
Mon Sep 02, 2019 10:36 pm
Forum: Development
Topic: New hardware I/O board using Parallax Propeller (VGA,Sound,Joystick,etc)
Replies: 31
Views: 2621

Re: New hardware I/O board using Parallax Propeller (VGA,Sound,Joystick,etc)

Charlie did get in touch.
However I tried doing a "Factory Reset" and that seems have fixed the problem with the ZXPand.
So, it's full steam ahead now that I know the ZXGame WILL work with the ZXPand.

Bean
by Bean
Tue Aug 27, 2019 4:02 pm
Forum: Hardware
Topic: What else might be connected on the ZX81 alongside the ZXPand+ ?
Replies: 17
Views: 879

Re: What else might be connected on the ZX81 alongside the ZXPand+ ?

I have sent a message to SirMorris on sellmyreto on 8/22 but I haven't heard anything back yet.
Does anyone know if there is another way to try to contact him ?

Thanks,
Bean
by Bean
Tue Aug 27, 2019 4:00 pm
Forum: Development
Topic: New hardware I/O board using Parallax Propeller (VGA,Sound,Joystick,etc)
Replies: 31
Views: 2621

Re: New hardware I/O board using Parallax Propeller (VGA,Sound,Joystick,etc)

I have started a Facebook group to discuss the development of the firmware for this board.
I would invite you to join if you are interested.

https://www.facebook.com/groups/1067969326742375/

Bean
by Bean
Thu Aug 22, 2019 3:52 pm
Forum: Hardware
Topic: What else might be connected on the ZX81 alongside the ZXPand+ ?
Replies: 17
Views: 879

Re: What else might be connected on the ZX81 alongside the ZXPand+ ?

Okay, thanks. I will try to contact him.

Bean
by Bean
Thu Aug 22, 2019 2:31 pm
Forum: Hardware
Topic: What else might be connected on the ZX81 alongside the ZXPand+ ?
Replies: 17
Views: 879

Re: What else might be connected on the ZX81 alongside the ZXPand+ ?

Yeah, I have the regular ZXPand too (not a ZXPand+). And it just seems like it won't move the RAM out of the 8K to 16K area. Even after I do CONFIG "M=H" and verify with CONFIG "M" if I poke the 8K to 16K region it remembers the value, but if I poke the 40K to 48K region it doesn't. And after I powe...
by Bean
Thu Aug 22, 2019 1:45 am
Forum: Hardware
Topic: What else might be connected on the ZX81 alongside the ZXPand+ ?
Replies: 17
Views: 879

Re: What else might be connected on the ZX81 alongside the ZXPand+ ?

I am having a problem using the ZXPand "Version 2.5 Dragon" with my ZXGame interface. My interface uses the 8K to 16K area, but the ZXPand interferes with it even after I do CONFIG "M=H" and a CONFIG "M" show it as 16K - 48K. But if I poke the 8K to 16K region it will return what I poked. So it is a...
by Bean
Tue Aug 13, 2019 1:44 am
Forum: Development
Topic: New hardware I/O board using Parallax Propeller (VGA,Sound,Joystick,etc)
Replies: 31
Views: 2621

Re: New hardware I/O board using Parallax Propeller (VGA,Sound,Joystick,etc)

Using the existing 4 color mode and just setting the palette to the 4 gray scales in the 64-colors available would create a 2-bit grayscale screen. The price could be less than $100, but I'm not sure just yet. Might be as low as $50 for the kit. I will have to see. Again, the big advantage of the bo...
by Bean
Fri Aug 09, 2019 10:13 pm
Forum: Development
Topic: New hardware I/O board using Parallax Propeller (VGA,Sound,Joystick,etc)
Replies: 31
Views: 2621

Re: New hardware I/O board using Parallax Propeller (VGA,Sound,Joystick,etc)

Personally I think it's not interesting, as it will only work with software custom made for the device. True, that is a fair point. The advantage is that you can run the ZX81 in FAST mode, which really unleashes the speed. Machine code is crazy fast.. I don't plan to sell a bunch of these. It is mo...
by Bean
Fri Aug 09, 2019 2:23 pm
Forum: Development
Topic: New hardware I/O board using Parallax Propeller (VGA,Sound,Joystick,etc)
Replies: 31
Views: 2621

Re: New hardware I/O board using Parallax Propeller (VGA,Sound,Joystick,etc)

I haven't heard from anyone... I have pretty much decided on: VGA 640x200 2 color VGA 256x192 4 color (2 pages for page flippin' games) VGA 160x100 64 color Stereo sound (3 voices+1PWM left, 3 voices+1PWM right) Wii Classic Controller for joystick I plan to offer it as a kit for about $100 - $150. A...
by Bean
Wed Aug 07, 2019 2:00 pm
Forum: Development
Topic: New hardware I/O board using Parallax Propeller (VGA,Sound,Joystick,etc)
Replies: 31
Views: 2621

Re: New hardware I/O board using Parallax Propeller (VGA,Sound,Joystick,etc)

I am working on the VGA modes and I was wondering what everyone thought would be good modes to have for games and such. I have about 16K for video memory and maybe another 2-4K for palette info. So with that in mind here is what I came up with. Text: 80x25 (not sure about what is possible for colors...