ZX spectrum Sprite chip

Emulator and emulator development specific topics
Post Reply
User avatar
chernandezba
Posts: 182
Joined: Tue Mar 11, 2014 4:30 pm

ZX spectrum Sprite chip

Post by chernandezba » Fri Nov 06, 2015 11:58 pm

Hi everyone.

As I said some time ago, I wanted to make a 'virtual' Sprite chip for the ZX spectrum, on my ZEsarUX emulator. The idea is to make some simple chip that maybe could be done in real hardware... ;)

Link to a video demo:



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

The main features of the video chip are:

-Sprite size 8x8 pixels, every pixel with a separate color of a 16 colour palette. This palette can be: standard ZX spectrum colour, or ulaplus palette, or spectra palette


-Every Sprite can be zoomed x2
-every Sprite can be mirrored horizontal or vertical

Every Sprite is shown over the main spectrum display.

-you can scroll the main video memory on each 4 directions. Scrolled is only done on pixels, not attributes yet

I hope you like it ;)

Cheers
Cesar
----

ZEsarUX
ZX Second-Emulator And Released for UniX
https://github.com/chernandezba/zesarux

User avatar
chernandezba
Posts: 182
Joined: Tue Mar 11, 2014 4:30 pm

Re: ZX spectrum Sprite chip

Post by chernandezba » Fri Nov 06, 2015 11:59 pm

I attach some other video demos about the Sprite chip. They are date ordered, so I've been working on the Sprite chip these last days and every video shows a new feature added:


https://youtu.be/eygpBkvJJew

https://youtu.be/CgafVJhByag

https://youtu.be/1mNOBpNZmXU

https://youtu.be/xom2UijvhOc

https://youtu.be/iaVkCzPHdOA
----

ZEsarUX
ZX Second-Emulator And Released for UniX
https://github.com/chernandezba/zesarux

RWAP
Site Admin
Posts: 1313
Joined: Thu May 08, 2008 8:42 am
Location: Stoke-on-Trent, UK
Contact:

Re: ZX spectrum Sprite chip

Post by RWAP » Sat Nov 07, 2015 3:05 pm

Interesting - I wonder if it might be worth talking with Mark Smith on Facebook - he is making a replacement ULA for the Spectrum.

Whilst I appreciate that this is a software only solution at the moment, it might be that Mark could make some minor changes to his ULA PCB to allow the Sprite chip to be added at a later date if it got made into hardware...

I have pointed Mark at this forum post too

User avatar
chernandezba
Posts: 182
Joined: Tue Mar 11, 2014 4:30 pm

Re: ZX spectrum Sprite chip

Post by chernandezba » Sat Nov 07, 2015 4:32 pm

RWAP wrote:Interesting - I wonder if it might be worth talking with Mark Smith on Facebook - he is making a replacement ULA for the Spectrum.

Whilst I appreciate that this is a software only solution at the moment, it might be that Mark could make some minor changes to his ULA PCB to allow the Sprite chip to be added at a later date if it got made into hardware...

I have pointed Mark at this forum post too
Thanks Rich. Mark has already told me about making some maybe limited version of this Sprite chip.. :)
----

ZEsarUX
ZX Second-Emulator And Released for UniX
https://github.com/chernandezba/zesarux

User avatar
chernandezba
Posts: 182
Joined: Tue Mar 11, 2014 4:30 pm

Re: ZX spectrum Sprite chip

Post by chernandezba » Wed Nov 11, 2015 11:15 pm

Hi

I have uloaded another video demo:

https://youtu.be/vUTapkT4wl0

Showing sprite zoom, horizontal and vertical mirror, and some new Sonic movements ;)

I hope you like it.

Cheers
Cesar
----

ZEsarUX
ZX Second-Emulator And Released for UniX
https://github.com/chernandezba/zesarux

Post Reply