Indivision OCS/ECS under development - Page 2

alexh · 01 April 2009, 15:07

You can hack it so that DF0 is the external floppy drive connector.

Plus If you have 2MB Chip RAM (which you will have cos you need an A603) and a PCMCIA SRAM card you can run all your fave games from HD (or IDE->CF) with WHDload!

NovaCoder · 01 April 2009, 23:56

Quote:

Originally Posted by alexh

Latest thinking (posts by Jens, Toni Wilen, myself) is the Indivision ECS is not a standard scandoubler but might have its own re-implemented Denise inside the FPGA.

Easily do-able given the availability of MiniMig source code and the fact that Jens announced his own re-implementation of ECS in the form of Clone-A.

I wonder how good (compatible) it is?

That wil be very interesting if accurate and one up on the IndivisonAGA. I'd hoped that the IndivisonAGA would be a re-implementation of AGA but with the slow chipram, I guess it would be limited to the speed of the standard AGA chipset (eg no-point in doing it). A better idea is a re-implemenation of the entire 1200 MB (faster blitter, chip ram). This was one of the 'possible' out comes stated by Jens from good old Clone-A.

gklinger · 02 April 2009, 01:50

If you'll forgive a little Amiga dreaming, what I'd like to see done is for Jens to create a some kind of Indivision-like AGA video card with on-board RAM. A GB1000 with an AGA chipset would have me dancing like a fool (obscure Amiga reference). It would also be very cool to have AGA in a 3000. I'm not sure if this is technically feasible though. What do you think, Alex?

Photon · 02 April 2009, 02:22

Always cool with ppl still developing nice hardware

Search failed at googling and finding any pics of the Chameleon cartridge. I can help with SEO if Jens needs it.

SEO and dev+distributor working closely together is an unbeatable combination!

Amigakit, 601 any good? Not that I have found anyone selling 12"-ish "checkout terminal" type TFTs for my A600 laptop anyway...

Jope · 02 April 2009, 07:19

Quote:

Originally Posted by gklinger

It would also be very cool to have AGA in a 3000. I'm not sure if this is technically feasible though. What do you think, Alex?

Well, they did it at Commodore.

http://www.amiga-hardware.com/showha....cgi?HARDID=23

"Upgrading to AGA" always means a redesign of the motherboard in any case.

gklinger · 02 April 2009, 07:25

Quote:

Originally Posted by Jope

Well, they did it at Commodore.

Yeah, there is that but since it never made it to production...

I'm (mostly) fantasizing but who knows what kinds of magic could be cooked up.

Jakodemus · 02 April 2009, 07:39

Does anyone know if this new Indivision will also support CDTV?

alexh · 02 April 2009, 10:38

It will.

TheCorfiot · 02 April 2009, 11:25

Quote:

Originally Posted by NovaCoder

That wil be very interesting if accurate and one up on the IndivisonAGA. I'd hoped that the IndivisonAGA would be a re-implementation of AGA

It maybe an implementation of part of the AGA chipset.

Do any of us know exactly how the Indivisions work ??

TC

rave · 02 April 2009, 12:04

Hmmmz,

Rave is pondering all kinds of hackery!

alexh · 02 April 2009, 12:23

The FPGA & Registers within it must be write only (at least over most of the address map) so as not to cause bus contention.

They are not going to give you the I/O of the PCB so the chance of you making your own replacement FPGA contents is very slim to non.

Ratte · 02 April 2009, 12:40

Quote:

Originally Posted by alexh

Latest thinking (posts by Jens, Toni Wilen, myself) is the Indivision ECS is not a standard scandoubler but might have its own re-implemented Denise inside the FPGA.

Easily do-able given the availability of MiniMig source code and the fact that Jens announced his own re-implementation of ECS in the form of Clone-A.

I wonder how good (compatible) it is?

Any sources for your "thinking"?
(mousepointer delacing ...)

alexh · 02 April 2009, 12:53

Quote:

Originally Posted by Ratte

Any sources for your "thinking"?

The fact that the digital RGB signals are not present on the A600 trap-door connector and yet that is where the Indivision ECS (via the A603) will connect to the Amiga.
Toni mentioned a post from Jens
The Sync signals are not present on the Lisa (Indivision A1200)
Some reports of non characteristic gfx problems on early firmware versions (Indivision A1200)

Toni Wilen · 02 April 2009, 13:08

Quote:

Originally Posted by alexh

The fact that the digital RGB signals are not present on the A600 trap-door connector and yet that is where the Indivision ECS (via the A603) will connect to the Amiga.
Toni mentioned a post from Jens
The Sync signals are not present on the Lisa (Indivision A1200)
Some reports of non characteristic gfx problems on early firmware versions (Indivision A1200)

I found the post, it was in amiga.org news item.

There are sync signals present on the Lisa, not as separate signals but in RGA bus (those strobe registers, don't remember the names), they are basically equivalent to hsync and vsync. AFAIK, AGA version does "sample" digital RGB outputs.

Conspiracy theory: they are testing Clone-A Denise emulation in this version, this way they get feedback and fixes without possibly damaging clone-a's reputation if some things don't work 100% correctly (demos can make really weird things..)

rave · 02 April 2009, 16:11

Oooh I love a good conspiracy

Ratte · 02 April 2009, 22:41

If its true, it could be verified by the Lisa/Denise ID ...

NovaCoder · 03 April 2009, 05:02

Quote:

Originally Posted by Toni Wilen

I found the post, it was in amiga.org news item.

There are sync signals present on the Lisa, not as separate signals but in RGA bus (those strobe registers, don't remember the names), they are basically equivalent to hsync and vsync. AFAIK, AGA version does "sample" digital RGB outputs.

Conspiracy theory: they are testing Clone-A Denise emulation in this version, this way they get feedback and fixes without possibly damaging clone-a's reputation if some things don't work 100% correctly (demos can make really weird things..)

I assumed they used some of Clone-A knowledge to design the Indivision but to also be testing Clone-A with the Indivision would be pretty cool

alexh · 03 April 2009, 09:24

Quote:

Originally Posted by Ratte

If its true, it could be verified by the Lisa/Denise ID ...

Heh

If it did work like this, to avoid bus contention with the REAL Lisa/Denise chip (which is not removed) the registers in the FPGA would have to be WRITE only, no?

Paul_s · 03 April 2009, 19:44

I read about the OCS/ECS indy, I'm only starting to think about one for the CD32 at the moment, I'm going to be skint

Quote:

Originally Posted by gklinger

Yeah, there is that but since it never made it to production...

I'm (mostly) fantasizing but who knows what kinds of magic could be cooked up.

Now, that should've been the final A4000... all we got is a severely cut down version

NovaCoder · 08 April 2009, 03:05

Quote:

Originally Posted by Jope

"Upgrading to AGA" always means a redesign of the motherboard in any case.

This is why I'm hoping that Clone-A will eventually make it out as a drop-in replacement to the original 1200 MB

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01 April 2009, 15:07	#21
alexh Thalion Webshrine Join Date: Jan 2004 Location: Oxford Posts: 14,354	You can hack it so that DF0 is the external floppy drive connector. Plus If you have 2MB Chip RAM (which you will have cos you need an A603) and a PCMCIA SRAM card you can run all your fave games from HD (or IDE->CF) with WHDload!

02 April 2009, 01:50	#23
gklinger Vegetable Lasagna Join Date: Mar 2007 Location: Toronto, CANADA Age: 54 Posts: 711	If you'll forgive a little Amiga dreaming, what I'd like to see done is for Jens to create a some kind of Indivision-like AGA video card with on-board RAM. A GB1000 with an AGA chipset would have me dancing like a fool (obscure Amiga reference). It would also be very cool to have AGA in a 3000. I'm not sure if this is technically feasible though. What do you think, Alex?

02 April 2009, 02:22	#24
Photon Moderator Join Date: Nov 2004 Location: Eksjö / Sweden Posts: 5,604	Always cool with ppl still developing nice hardware Search failed at googling and finding any pics of the Chameleon cartridge. I can help with SEO if Jens needs it. SEO and dev+distributor working closely together is an unbeatable combination! Amigakit, 601 any good? Not that I have found anyone selling 12"-ish "checkout terminal" type TFTs for my A600 laptop anyway...

02 April 2009, 07:39	#27
Jakodemus Registered User Join Date: Aug 2006 Location: Finland Posts: 62	Does anyone know if this new Indivision will also support CDTV?

02 April 2009, 10:38	#28
alexh Thalion Webshrine Join Date: Jan 2004 Location: Oxford Posts: 14,354	It will.

02 April 2009, 12:04	#30
rave Amiga's made me who I am. Join Date: Feb 2007 Location: Nottingham UK Age: 44 Posts: 178	Hmmmz, Rave is pondering all kinds of hackery!

02 April 2009, 12:23	#31
alexh Thalion Webshrine Join Date: Jan 2004 Location: Oxford Posts: 14,354	The FPGA & Registers within it must be write only (at least over most of the address map) so as not to cause bus contention. They are not going to give you the I/O of the PCB so the chance of you making your own replacement FPGA contents is very slim to non.

02 April 2009, 16:11	#35
rave Amiga's made me who I am. Join Date: Feb 2007 Location: Nottingham UK Age: 44 Posts: 178	Oooh I love a good conspiracy

02 April 2009, 22:41	#36
Ratte Registered User Join Date: Sep 2008 Location: Germany Posts: 331	If its true, it could be verified by the Lisa/Denise ID ...

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