Activity

From 07/01/2017 to 07/30/2017

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

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

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

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

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

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

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

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

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

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

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

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

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