EclaireXL

07/22/2017

FO 09:06 PM Bug #56: Galaxian Cartridge crash

This works on the latest core I'm using (lets call it v15 - address decoder rework!) foft

07/20/2017

ND 10:06 PM Bug #56 (Closed): Galaxian Cartridge crash

i tried the physical 8k Galaxian cart on the Eclaire with Core v13 and the game crash 2sec into the demo screen
the same game in CAR format loaded form the eclaire menu works fine
its the physical cart that crash ndary

07/19/2017

FO 08:14 PM Feature #55 (New): Replace main CPU

I really find the stack based zpu annoying to debug. Also as its setup the rom is full.
Consider replacing with something newer, also with gcc support, such as https://github.com/SpinalHDL/VexRiscv. foft

07/15/2017

FO 09:47 PM Bug #25: F10 Hard Reset Ignore inserted cartridge (Core v7)

This is the last thing remaining for V15. In order to do it (simply) I decided to allow off PBI access from turbo mode and zpu. That seems to work now, except its failing timing. I think I need to plumb the internal freezer in differentl... foft

FO 09:44 PM Bug #25 (In Progress): F10 Hard Reset Ignore inserted cartridge (Core v7)

foft

07/09/2017

FO 01:25 PM Feature #24: A board with Atari SOUL!!!! (ROM in block ram support)

I'm using block ram in the FPGA for the OS ROM and BASIC. It can be read in 2 cycles and written to in 1 cycle. SDRAM takes about 5-6 iirc. So in turbo mode, with no cpu cache, this makes a huge difference in speed. foft

07/07/2017

SA 11:05 PM Feature #24: A board with Atari SOUL!!!! (ROM in block ram support)

??? What you mean here? sadosp

FO 09:26 PM Feature #24: A board with Atari SOUL!!!! (ROM in block ram support)

Also of course nice and fast vs uncached sdram...
sysinfo fp test from 6x->20x :-) I probably need a cache to get this closer to 30-40x, but that will take some work. foft

FO 09:13 PM Feature #2: PBI support

Added antic refresh cycles foft

07/06/2017

FO 09:28 PM Feature #51: Debug port

I have a first cut of this building. This will be part of the v15 core.
Next I need to build the capture software to stream this into the PC. Then some post-analysis software, probably a hacked up emulator. foft

07/05/2017

FO 09:41 PM Bug #49 (Closed): CORE13 - NTSC/PAL switching

foft

FO 09:40 PM Bug #49: CORE13 - NTSC/PAL switching

Fixed, will be in v15 when I release it. foft

07/04/2017

FO 09:31 PM Bug #49: CORE13 - NTSC/PAL switching

Trying to fix this one, but its nasty. I need more brain cycles to fix it... foft

FO 09:29 PM Feature #14: Svideo core for first prototype

Hmm, just reading that IRE is _relative_ so that might be why increasing voltage didn't make anything brighter!!
https://en.wikipedia.org/wiki/IRE_(unit)
So I wonder if I could have a 0V-0.5V signal that uses the correct relative s... foft

07/03/2017

SA 06:42 AM Feature #14: Svideo core for first prototype

Stephen wrote:
> Hate to be a dunce - where is the documentation for cabling s-video from this board?
You can use Green signal for composite video, or Green signal for Luma and Blue signal for Chroma for S-Video, from RGB connector.
sadosp

ST 12:31 AM Feature #14: Svideo core for first prototype

foft wrote:
> For anyone with composite/svideo setup. Please can you tell me what you think of svideo_gtia6.sof vs the previous version.
> ...
Hate to be a dunce - where is the documentation for cabling s-video from this board? I have... Stephen

07/02/2017

FO 10:50 PM Feature #14: Svideo core for first prototype

For anyone with composite/svideo setup. Please can you tell me what you think of svideo_gtia6.sof vs the previous version.
This is generated more the 'atari way' - i.e. off hue/brightness with phase shifts, rather than being based on ... foft

FO 11:42 AM Feature #14: Svideo core for first prototype

I mean svideo and composite, it's the same thing pretty much.
I've got the gtia style one running pretty well for ntsc now. Its interesting to implement if nothing else:) foft

FO 01:10 PM Bug #54: GTIA issue when Turbo > 4X

Yeah, this kind of test program is very helpful. Thanks. foft

SA 05:54 AM Bug #54: GTIA issue when Turbo > 4X

Thanks Stephen!
sadosp

ST 03:46 AM Bug #54 (Closed): GTIA issue when Turbo > 4X

I'm attaching a BASIC listing of a PMG test program I wrote to assist in diagnosing an issue with the 1088XEL. For fun, I tried running it with the various Turbo speeds. 1, 2, 4 work perfectly. 8, 16, 32 display issues as shown in the... Stephen

07/01/2017

ST 06:43 PM Feature #14: Svideo core for first prototype

sadosp wrote:
> Maybe is time to think about implementing one external RGB -> composite/s-video converter, fit directly to VGA output connector.
> ...
My thoughts (coming from NTSC land). We haven't had TVs or monitors with S-Video co... Stephen

SA 05:31 PM Feature #14: Svideo core for first prototype

Maybe is time to think about implementing one external RGB -> composite/s-video converter, fit directly to VGA output connector.
But the question still remain for me if people really need it.
sadosp

FO 05:05 PM Feature #14: Svideo core for first prototype

That works, kind of! Basic screen and star wars shields look the correct colours, but I have no red. Also very grainy and svideo is a single colour?! foft

FO 12:59 PM Feature #14: Svideo core for first prototype

Writing an 'atari-style' implementation instead of going via RGB. Fixed saturation, simple phase shift for colour. foft

FO 07:10 AM Feature #14: Svideo core for first prototype

Interesting...
http://atariage.com/forums/topic/29621-atari-video-circuits-experiment/
So fixed saturation (except gray), just phase shifted for the cols. Then add luma. Might try that rather than generic rgb component. foft

FO 03:59 PM Feature #53 (Closed): Add version number to settings

Add version number to settings foft

06/30/2017

ST 11:30 PM Bug #52: Atari Control Picture

foft wrote:
> I checked an older core in case I introduced it with the antic timing changes for pbi. Was bad then, so unrelated.
> ...
Excellent - glad it will be of help. I only recently discovered this cool program. Stephen

FO 10:15 PM Bug #52: Atari Control Picture

I checked an older core in case I introduced it with the antic timing changes for pbi. Was bad then, so unrelated.
This is a nice static picture to debug in sim or signaltap. I like this kind of test case:-) foft

FO 10:10 PM Feature #14: Svideo core for first prototype

Added a poke 712,15 for comparison of max values. Interesting how the amplitude for basic 'blue' is so much higher yet the peak amplitude is comparable...
Atari:
!composite_atari_max.png!
Eclaire:
!composite_eclaire_max.png! foft

FO 09:54 PM Feature #14: Svideo core for first prototype

I mean see how the 'white' on ready already takes most of the range, without trying to increase it. foft

FO 09:54 PM Feature #14: Svideo core for first prototype

Atari
!composite_atari_basic.png!
Eclaire
!composite_eclaire_basic.png!
We have a range of 0-1v on the DAC. 0-0.3V sync and 0.3V-1.0V is set by changing the dac level. So trouble is its not really enough. Might still need to chan... foft

FO 09:50 PM Feature #14: Svideo core for first prototype

Added traces of Atari basic from the scope, to see the voltage level differences.
Eclaire is driving my monitor, Atari is through a 66ohm resistor (little low, so voltage is suppressed a little).
Still, a stark difference! foft

06/29/2017

ST 11:30 PM Bug #52 (Closed): Atari Control Picture

CORE14, PAL & NTSC exhibit the same behaviour. When displaying the attached Atari Control Picture, the colour blocks in column 0 are only displaying the rightmost 4 pixels, not the entire 8.
Altirra (and real hardware) : ACP.png
Ecl... Stephen

FO 08:59 PM Bug #49: CORE13 - NTSC/PAL switching

I think I've identified the problem. If the zpu happens to exit the menu at the end of an 'original' cycle the pbi logic can block the response from a memory access. Now to think about how to implement this in a better way... foft