Hardware RTG board emulation

[Toni Wilen]

Thanks. PicassoII/II+ passthrough switch should work correctly now.

[Mad-Matt]

An extension to previous post regarding chipram. I have reduced aga workbench to pal hires 4 colours for maximum chipmem availability and now the screenmode test screen appears on a few screen resolutions, and can now open 1600x1200 (although resulting in a grey screen). The testcard in CGXMode doesn't show in anymode either, just a black screen before returning back to workbench.

[Toni Wilen]

CGX4 installed and problems found.. CGX4 uses CPU to VRAM blit operations that wasn't fully hooked up to Cirrus Logic emulation.

Now it really does work, at least 640x480x8. There is graphics corruption too (background isn't always erased), something to do with blitter emulation.

Picasso II/Picasso II+/Piccolo/Spectrum (both ZII and ZIII) now works in CGX4 mode. Piccolo isn't detected, probably something wrong in autoconfig data.

JIT seems to cause crashes, do not enable it.

EDIT: graphics corruption fixed. Yet another buggy "is blit valid" test..

EDIT2: Piccolo SD64 now works partially. Some modes only work.

[mark_k]

Originally Posted by Toni Wilen

Piccolo isn't detected, probably something wrong in autoconfig data.

I have a Piccolo (not SD64) in my A2000, what info might you need from that?

[Toni Wilen]

Originally Posted by mark_k

I have a Piccolo (not SD64) in my A2000, what info might you need from that?

It is already working. (I meant to say Piccolo and Piccolo SD64 works, not just SD64)

Only remaining issue is Piccolo SD64 having corrupted graphics in some modes, possibly related to being the only one with 4M of VRAM.

EDIT: Piccolo SD64 corruption fixed, it used unimplemented feature.

[Kitchen2010]

MAME have TMS34010 emulator thus A2410 emulation should be quite simple.

Unfortunately, MAME'S license is incompatible, so we cannot use this code.

Recently, MAME has changed its license to BSD-3/LGPL/GPL license (http://www.mamedev.org/?p=405), so it's now possible to use MAME's TMS34010 emulator (https://github.com/mamedev/mame/tree...u/cpu/tms34010) to create an emulation for the Commodore A2410 TIGA graphic board, when Tony has finished implementing all Turboboards and SCSI/AT/XT-Harddiskboards and wants to implement all graphic boards.

After the A2090(A)/A2091/590 SCSI/XT-HD-Board and the A2630 Turboboard that would be a nice addition a Commodore board and almost all hardware of the original A3000UX would be emulated.

[Toni Wilen]

I noticed but it has not been happened yet.

Another interesting option is Voodoo 3. Supported by MAME, at least up to 16M VRAM support, RTG driver exists. AFAIK it is the only existing emulated chip that is RTG compatible and has more than 4M VRAM.

A2410 is nice to have but also mostly useless

[Locutus]

Voodoo3 would also get you OS4 support, and the joy of masses complaining about how to get it to work (-:

[Michael Sykes]

Voodoo3 in WinUAE! I thought that is impossible.
That means all the fancy ppc 3d demo stuff and WipeOut2097 will work?
Or will stuff like that run too slow because the card is emulated by the cpu?
I know how some MAME games crawl even on modern hardware.

[gulliver]

@Toni Wilen

Have you thought about supporting both the Retina ZII and Retina ZIII?

[Toni Wilen]

Originally Posted by Michael Sykes

Voodoo3 in WinUAE! I thought that is impossible.
That means all the fancy ppc 3d demo stuff and WipeOut2097 will work?
Or will stuff like that run too slow because the card is emulated by the cpu?
I know how some MAME games crawl even on modern hardware.

Getting native RTG mode with higher resolutions (=has more than 4M VRAM) is all I care about. Nothing else matters for me.

Originally Posted by gulliver

@Toni Wilen

Have you thought about supporting both the Retina ZII and Retina ZIII?

No, standard answer: That weird NCR display chip is not emulated anywhere.

[Michael Sykes]

[QUOTE=Toni Wilen;1032581]Getting native RTG mode with higher resolutions (=has more than 4M VRAM) is all I care about. Nothing else matters for me.

This alone will be enough to make a lot of people, including me, very happy.

The best I could get from the P IV was 1080p in 8bit.That left me with unusable 0 Mb gfx-ram. Nuts I know. But it can be done....

[gulliver]

Originally Posted by Toni Wilen

No, standard answer: That weird NCR display chip is not emulated anywhere.

The Retina ZII has it own custom RTG system called RetinaEMU and it is supported by both NetBSD without X server and OpenBSD (chip is NCR 77C22E+).

The Retina ZIII is supported on Linux, NetBSD and OpenBSD, and has both CGX and P96 drivers available (chip is NCR 77C32BLT).

https://github.com/achernya/iap-6.82...vgadoc/NCR.TXT

I hope you change your mind

[Toni Wilen]

Originally Posted by gulliver

The Retina ZII has it own custom RTG system called RetinaEMU and it is supported by both NetBSD without X server and OpenBSD (chip is NCR 77C22E+).

The Retina ZIII is supported on Linux, NetBSD and OpenBSD, and has both CGX and P96 drivers available (chip is NCR 77C32BLT).

https://github.com/achernya/iap-6.82...vgadoc/NCR.TXT

I hope you change your mind

Only (stupid) reason enough to implement it is to enable (future) emulation of Draco...

[gulliver]

Originally Posted by Toni Wilen

Only (stupid) reason enough to implement it is to enable (future) emulation of Draco...

Well, that was my hidden agenda.

BTW: Remember I have a VlabMotion as a gift for you whenever/if you feel you want to tackle its emulation. And I can also offer for loan a DraCo if you wish to emulate it (I will just need to figure out how to send it cheaply).