GB TETRIS EMULATOR TEMU FOR AMSTRAD CPC 6128(+)

[Gryzor]

We have to go deeper.

[pelrun]

Oops, I totally thought it was 40Crisis who posted that 

[TotO]

This is my lame attempt to emulate GB Tetris on a CPC

Can we expect to have something like that? (very WIP theme)

[40Crisis]

As the GB hardware is more-or-less Z80 based, is your application emulating all the GB or "just" some parts ?
Anyway I am impressed !

Tetris was one of the first GB game, if not the first.
It's not a very demanding game, that's why emulating it on a CPC is possible.
Gameboy processor is very close to Z80.
I "only" needed for tetris to add emulation support for 8 extra instructions not present in Z80.
It doesn't use "tricky" graphics rendering, the graphics emulation engine just fit this.
Also sound emulation is very basic.

[40Crisis]

It's really impressive indeed, I wonder if other games would be possible? I imagine Super Mario Land may struggle with the scrolling...?

It's possible because tetris is not a very demanding game.Keep in mind you have to render on the CPC at 60hz background graphics in 4 colors (160x144) + up to 40  8x8 sprites

[40Crisis]

A minor thing to report - got to the ending on Type A - the rocket ship taking off is quite glitchy and flickery. Not complaining, just reporting things as I find.
I'm absolutely loving this of course

I'm perfectly aware of how imperfect it is in the bonuses parts. I spent many time trying to fix it and find the best compromise.
In this part of the game, 40 sprites 8x8 need to be renderered. That's why it"s very slow on the CPC (major framerate drop ).
Fortunately, ingame only up to 12 sprites 8x8 are needed.

[40Crisis]

Can we expect to have something like that? (very WIP theme)

I'll try if you can provide me with cpc palette data

[TotO]

I'll try if you can provide me with cpc palette data

OK, I will give you that and a new palette too if you like it.

[TotO]

@40Crisis : The idea is to use, if possible, a 256x224 screen area and a white border to fake the Game Boy bezel.

Theme 01 test:
- BORDER = 26
- INK 0 = 3
- INK 1 = 13
- INK 2 = 16
- INK 3 = 25

Theme 02 test:
- BORDER = 26
- INK 0 = 9
- INK 1 = 13
- INK 2 = 12
- INK 3 = 25

Theme 03 test:
- BORDER = 26
- INK 0 = 0
- INK 1 = 13
- INK 2 = 12
- INK 3 = 25

[zeropolis79]

In theory, if it was renamed to the same filename required for the program, could other early Gameboy games be run on this program?

[TotO]

In theory, if it was renamed to the same filename required for the program, could other early Gameboy games be run on this program?

The ROM is probably patched to get control over it. And no scrolling support, but Dr.Mario may be? 

[vasilisk]

Do we save "with header" or "without header" ?

[XeNoMoRPH]

https://youtu.be/LQfCg672t-U

[pelrun]

Do we save "with header" or "without header" ?

You absolutely need the header, otherwise AMSDOS can't load it as a binary file.

[40Crisis]

@40Crisis : The idea is to use, if possible, a 256x224 screen area and a white border to fake the Game Boy marquee.

Theme 01 test:
- BORDER = 26
- INK 0 = 3
- INK 1 = 13
- INK 2 = 16
- INK 3 = 25

Theme 02 test:
- BORDER = 26
- INK 0 = 9
- INK 1 = 13
- INK 2 = 12
- INK 3 = 25

Theme 03 test:
- BORDER = 26
- INK 0 = 0
- INK 1 = 13
- INK 2 = 12
- INK 3 = 25

Test version - resolution changed to 256x224 + 3 sets of palette - Personally, I only like the theme03 because the others give "messy" menus

[40Crisis]

In theory, if it was renamed to the same filename required for the program, could other early Gameboy games be run on this program?

Sorry, no way

[pelrun]

In theory, if it was renamed to the same filename required for the program, could other early Gameboy games be run on this program?

It's best not to think of this as emulation. It's more accurately a port, replacing the gameboy-specific code in the rom with CPC equivalents. It just happens to do it on the fly rather than being packaged as a pre-modified binary.

[TotO]

Test version - resolution changed to 256x224 + 3 sets of palette - Personally, I only like the theme03 because the others give "messy" menus

It seems less empty like that.
Thank you!

Sure, the palettes tests are probably not the best choice. Sorry I will rethink about that!!!
Can we add few design things on the screen to improve the bezel visual?
(palette update for the colour strips, texts and rounded corners)

[zeropolis79]

Thanks - I've not had the chance to try it yet but I'll be trying it on my Plus this evening..

[Skunkfish]

TotO, that marquee looks stunning! I hope 40Crisis has a chance to implement? 

[40Crisis]

It seems less empty like that.
Thank you!

Sure, the palettes tests are probably not the best choice. Sorry I will rethink about that!!!
Can we add few design things on the screen to improve the marquee visual?
(palette update for the colour strips, texts and rounded corners)

Toto, do you have the inlay in cpc format with palettes values ?

[TotO]

TotO, do you have the inlay in cpc format with palettes values ?

Sure, I can provide you what you want. (may be not today)

[40Crisis]

Sure, I can provide you what you want. (may be not today)

Thanks

[roudoudou]

Hi @40Crisis Can you tell us how the emulator works?
Thank you

[norecess]

Woaahh this reminds me the excitement I got when I discovered Syx/TotO's PacMan emulator few years ago..!

Splendid, I'm sincerely impressed.

Please, release a V2 with some (if not all..) of the improvements from TotO !