"pituka" In Dev

[Reesy]

I've sent him my Z80 core, unfortunately I have not had chance to write some good intructions on how to implement the Z80 core in a emulation project. But hopefully he'll be able to get it working, If not I've offered to help.

P.S I've got my Z80 core working in my genesis emulator ( DrMD ), I just need a fast YM2612 emulator which hopefully I'll be able to get from Rob Brown ( he did the sound core in Fgen ), anyway the PSG sounds good Expect a release soon....

 

[kotd]

I've sent him my Z80 core,  unfortunately I have not had chance to write some good intructions on how to implement the Z80 core in a emulation project.  But hopefully he'll be able to get it working, If not I've offered to help.

P.S  I've got my Z80 core working in my genesis emulator ( DrMD ), I just need a fast YM2612 emulator which hopefully I'll be able to get from Rob Brown ( he did the sound core in Fgen ), anyway the PSG sounds good   Expect a release soon....

​

You've got an MD emulator Reesy???? WIth SOUND on gp32?? OMG!!!!!! Please let me know so I don't sell my remaining gp32_console

So is Loridan also working on a MD emu?

 

[D_Skywalk]

Im working on sound; GUI more later

ATM, bad news, when sound playing gp32 PUF! and Reboot

Tomorrow i still trying

Cu pp and thanks a lots to Reesy for our DrZ80 core, i see the code tomorrow too

 

[DaveC]

I've sent him my Z80 core,  unfortunately I have not had chance to write some good intructions on how to implement the Z80 core in a emulation project.  But hopefully he'll be able to get it working, If not I've offered to help.

P.S  I've got my Z80 core working in my genesis emulator ( DrMD ), I just need a fast YM2612 emulator which hopefully I'll be able to get from Rob Brown ( he did the sound core in Fgen ), anyway the PSG sounds good   Expect a release soon....

​

You've got an MD emulator Reesy???? WIth SOUND on gp32?? OMG!!!!!! Please let me know so I don't sell my remaining gp32_console

So is Loridan also working on a MD emu?

​

I was told about this DrMd in a post on the GBA board awhile back. Reesy told me not to say anything so I didn't. I guess now the cat is out of the bag so to speak. It sounds really impressive and the terms ASM and FAST were mentioned alot. If he gets it working and turns out good we need to get donations to him. I sent Rlyeh some money for his fGen emu and will do the same here if it turns out. It looks as if the emu has progressed and looks like it may happen or it wouldn't have been mentioned I would guess. A couple more emus may pop out soon it looks Things are looking up.

 

[kotd]

Yep I'll send a donation to Reesy

 

[Reesy]

Yes I'm working on a MD emulator. At the moment its not emulating sprites as I'm still designing the code. The emulator currently uses the loader from gigadrive until I get time to write my own. The emulator core is written in ASM, this simplifies the interaction between the two asm cpu cores (Cyclone and DrZ80). All graphics routines are in ASM as well. The sounds routines are in C, and are taken from PC emulators..which means there slow. So at some point these will need to be re-written in ASM, the PSG should be easy, the FM emulator will not be easy ( for me anyway ).

This is how the emulator currently runs
At 133Mhz
With autoframe skipskip and with PSG sound emulation the emulator runs at 30-50 frames a second ( ie frame skip of 1 )

At 166Mhz
With autoframe skipskip and with PSG sound emulation the emulator runs at 90-110 frames a second ( I'm assuming there's a problem with timers when you overclock to 166Mhz )

But at both speeds the emulator appears to run very smoothly ( well as far as I can tell without any sprites )

Any sorry for hijacking for your thread D_Skywalk

 

[kotd]

Ok thanks a million Reesy. I will be keeping my gp32 now. If you need a Beta tester I'm your man with the complete rom set. Previously did it for fdave who dissapeared....

 

[Wolfsclaw]

cool reesy, keep up the good work ;P

 

[BaDToaD]

Ok thanks a million Reesy. I will be keeping my gp32 now. If you need a Beta tester I'm your man with the complete rom set. Previously did it for fdave who dissapeared....

​

Hehe told ya to hang on a few days

 

[DaveC]

...
But at both speeds the emulator appears to run very smoothly ( well as far as I can tell without any sprites )

Any sorry for hijacking for your thread D_Skywalk

​

A new thread could be made about this as it is very worthy. I thought about doing it but I wasn't sure how much attention you wanted (or don't want) about this. I would hate to see you bombarded by a bunch of e-mails from ROM lamers asking you when it will be done and to hurry up.

If it is ok with you we can make a thread about this but it is entirely up to you.

Thanks for your current efforts

 

[kotd]

Ok thanks a million Reesy. I will be keeping my gp32 now. If you need a Beta tester I'm your man with the complete rom set. Previously did it for fdave who dissapeared....

​

Hehe told ya to hang on a few days

​

Yep you were right thanks for saving my second Gp32 mate

 

[D_Skywalk]

PituKa begins talking :lol:

This afternoon PituKa sound has become to work!!

The first version of sound emulation its too buggy and need some testing and depuring. Im started to port drZ80 to Pituka too

Cu pp and NP Ressy for this post hijacking

 

[DaveC]

Ok thanks a million Reesy. I will be keeping my gp32 now. If you need a Beta tester I'm your man with the complete rom set. Previously did it for fdave who dissapeared....

​

Hehe told ya to hang on a few days

​

Yep you were right thanks for saving my second Gp32 mate

​

If I were you I would trade it for a BLU though. I have played fGen on it after I got it and the colors are so nice on the BLU. So are the ST emu colors. Many complained about the gamma on CaSTaway but with the BLU it is perfect.

 

[D_Skywalk]

Please, no more offtopics... thks

Keep this thread to PituKa WIP and any coments

cu

 

[DaveC]

PituKa begins talking  :lol:

This afternoon PituKa sound has become to work!!

The first version of sound emulation its too buggy and need some testing and depuring. Im started to port drZ80 to Pituka too

Cu pp and NP Ressy for this post hijacking

​

I don't really know alot about this system. What is the resolution of the screen ? It looks like it has more colors than the C64 too.

Anyway thanks for the good work, I can't wait to see it when it is released

 

[Octoate]

I don't really know alot about this system. What is the resolution of the screen ? It looks like it has more colors than the C64 too.

Anyway thanks for the good work, I can't wait to see it when it is released

​

The CPC has three different screen resolutions and a color palette of 27 colors (in the Plus series with 4096 colors):
Mode 0: 160x200 with 16 colors
Mode 1: 320x200 with 4 colors
Mode 2: 640x200 with 2 colors

The CPU is a Z80 clocked at 4 MHz, the soundchip is an AY-3-8912 (which is also used in the Atari ST) and the CRTC 6845 is used as graphics chip.

 

[D_Skywalk]

ATM still depuring CRTC code, some Gate-Array scan bugs and trying understood (and apply) drZ80 to Pituka code... its a hard time... h34r:

i've got good news too, Antiriad send me some artwork for PituKa: Icon & Menu

artwork (see the bottom page)

Cu

 

[rackbox]

The CPU is a Z80 clocked at 4 MHz, the soundchip is an AY-3-8912 (which is also used in the Atari ST) and the CRTC 6845 is used as graphics chip.

​

The CPU is actually a Z80a - not that the difference is huge, but some games/programs make use of the ekstra undocumented features in this "buggy" version of the CPU. Including my own creations ;-)

I hope that these features are maintained in the emu. But I am ecstatic about any CPC release, so I won't demand too much.

I'll see if I can find a good Z80a emu core somewhere, if that can help anyone. Though it might seem a bit improbable.

 

[DaveC]

I don't really know alot about this system. What is the resolution of the screen ?  It looks like it has more colors than the C64 too.

Anyway thanks for the good work, I can't wait to see it when it is released 

​

The CPC has three different screen resolutions and a color palette of 27 colors (in the Plus series with 4096 colors):
Mode 0: 160x200 with 16 colors
Mode 1: 320x200 with 4 colors
Mode 2: 640x200 with 2 colors

The CPU is a Z80 clocked at 4 MHz, the soundchip is an AY-3-8912 (which is also used in the Atari ST) and the CRTC 6845 is used as graphics chip.

​

What mode did the games use? I would guess 160 x 200.

Did any use the 4096 color mode?

That is weird, I wonder why the ST used such an old sound chip design, even the C64 had better sound.

 

[rackbox]

Most games used mode 0 but the later games made use of the clever ways the graphics chip could be tweaked to render different modes on different places on the screen. Even fast interrupt routines could cheat so that for every "rasterpoint" you could change colours thus having all 27 colors present on the same time. Clever, clever ;-)

Well - hope that we can "cheat" this emu too ;-)