WIP Retro Virtual Machine v2.0.

[jcgamestoy]

Hello forum!


Some progress in my new emulator (for MacOs and Windows).


This time I show you the emulation of the CRTC/Monitor with the game Relentless and the Mario demo by Batman Group.


At the end of the video you can see also the low level (mfm) emulation of the disc system in Discology.





Enjoy, there are a lot of things to finish yet. But i make a great progress in the last Month

[Gryzor]

How can we beta-test this?

[ThomH]

Most minor observation ever: I think perhaps you don't quite have the correct output aspect ratio. Pixels in Mode 1 aren't quite square. Pixels run for 40/64ths of the line, which is close to 77% of the visible area. 320 pixels of height would be about 111% of the visible area. So I make each Mode 1 pixel only about 92% as wide as tall.

EDIT: proper workings:

Per PAL, 52us of each line is visible and 288 lines are visible, with the screen having an aspect ratio of 4/3. In Mode 1 there are 320 pixels across and they take 40us to output, with each line being unique.

So each pixel is 1/288th of the screen tall and (40/52) * (1/320) = 1/416th of the screen wide. Correcting for screen aspect ratio, each pixel has an aspect ratio of (288*4)/(416*3) = 12/13.

So, a touch thinner than tall.

[jcgamestoy]

How can we beta-test this?

Soon, but there are a lot of things to finish.

Most minor observation ever: I think perhaps you don't quite have the correct output aspect ratio. Pixels in Mode 1 aren't quite square. Pixels run for 40/64ths of the line, which is close to 77% of the visible area. 320 pixels of height would be about 111% of the visible area. So I make each Mode 1 pixel only about 92% as wide as tall.

EDIT: proper workings:

Per PAL, 52us of each line is visible and 288 lines are visible, with the screen having an aspect ratio of 4/3. In Mode 1 there are 320 pixels across and they take 40us to output, with each line being unique.

So each pixel is 1/288th of the screen tall and (40/52) * (1/320) = 1/416th of the screen wide. Correcting for screen aspect ratio, each pixel has an aspect ratio of (288*4)/(416*3) = 12/13.

So, a touch thinner than tall.

Thanks for the info, I know, the development versions use a 1-1 pixels but how i use OpenGL for the video i will correct this in the final version. The overscan is configurable also.


By the way, I'm working in a Linux version too 

[ThomH]

By the way, I'm working in a Linux version too 

That's pretty cool! Dull questions: which underlying library are you using for the Linux port? As in: SDL, Qt or something like that? And is your code ES 2.x compatible, for a potential Raspberry Pi build?

(I checked for source code to try to answer this question for myself, but found none; apologies if you are open source and I should have been able to find out without asking)

I'm a Mac user usually, so I've used the previous version of your emulator, but I have a Pi behind the TV. Also I'm partway through porting my efforts via SDL but finding window management to be a hassle. It's one call in Cocoa but there actually seems to be no functioning way to request that a resizeable window will maintain a certain content-size aspect ratio in X11 and quite a few of the window managers ignore programmatic window events while the mouse button is down so you can't intercede there either. I guess that's why VLC doesn't even try.

[jcgamestoy]

That's pretty cool! Dull questions: which underlying library are you using for the Linux port? As in: SDL, Qt or something like that? And is your code ES 2.x compatible, for a potential Raspberry Pi build?

(I checked for source code to try to answer this question for myself, but found none; apologies if you are open source and I should have been able to find out without asking)

I'm a Mac user usually, so I've used the previous version of your emulator, but I have a Pi behind the TV. Also I'm partway through porting my efforts via SDL but finding window management to be a hassle. It's one call in Cocoa but there actually seems to be no functioning way to request that a resizeable window will maintain a certain content-size aspect ratio in X11 and quite a few of the window managers ignore programmatic window events while the mouse button is down so you can't intercede there either. I guess that's why VLC doesn't even try.

I'm using SDL2 but i'm in the process of making my own library. The final version will not use SDL2 at all.


The OpenGL part is OpenGL v2.1, then yes is "almost" OpenGL ES 2.x compatible.

[Phi2x]

.

[jcgamestoy]

I made some progress now we have a new phosphor screen shader  :





And the CRTC implementation seems stable now.


Stay tunned 

[Gryzor]

I just love this. I really do! Say, after this, can you do a terminal program for Windows (ssh please!) with those kinds of filters? I'd pay for one

[jcgamestoy]

Another video this time, showing the first device implemented in the Amstrad CPC (Toto's X-Mem)


And a short view of the debugger.





Enjoy

[Gryzor]

So sexy! Please bring the Windows version forward

[alan.turner]

This is very nice - love it on the Mac!! When can I get it???


Sent from my iPhone using Tapatalk Pro

[tjohnson]

This looks cool, on you're first video you had an untuned tv effect i presume this doesn't represent ctm640 emulation which would fade up when switched on.   The green screen, the general screen wobble and  line slowly running down the screen, did they do that? I haven't got one but is be surprised if this represents a healthy screen.  great work keep it up.  Trevor

Sent from my E5823 using Tapatalk

[blackdalek]

I'm keen to try out the linux version. Looks great.

[remax]

Wow... it's amazing !

[arnoldemu]

This looks cool, on you're first video you had an untuned tv effect i presume this doesn't represent ctm640 emulation which would fade up when switched on.   The green screen, the general screen wobble and  line slowly running down the screen, did they do that? I haven't got one but is be surprised if this represents a healthy screen.  great work keep it up.  Trevor

Sent from my E5823 using Tapatalk

None of those effects happen on the CPC or Plus.


The CPC screen was always solid and clear.

[VincentGR]

I need this.

[Apollo]

Looks really good!!
Any news when a beta version is available? Seems like it is stable enough already to give some other hands the chance to find bugs 

[jcgamestoy]

New video.





Low pass filter in the audio working.
Tape recording (CDT, PZX, TZX, CSW) working.


The Beta 1 is more close now. Stay tunned

[robcfg]

Looking forward to try it! 

[Gryzor]

I want this

[VincentGR]

I want this

You will burn in hell if you want this sorcery 

[dXoXb]

This looks fantastic!  Please, please keep this up 

[jcgamestoy]

More work.


Now supporting the "CPC Dandanator" cartridge.





Enjoy

[dXoXb]

Very nice 

When do we get to play around with the Windows version?