Activity

From 06/03/2018 to 07/02/2018

FO 09:44 PM EclaireXL Bug #67: Pokey two tone timing problem: I found if I pokey 53775,11+128 on the Atari then it matches the Eclaire output. Unfortunately forcing the serious output on eclaire to 1 or 0 does not change anything. Still its something to go on! foft

FO 10:03 PM EclaireXL Bug #67: Pokey two tone timing problem: So, errr identical then! Going to have to think about this one...
B is Atari, A is EclaireXL.
!http://www.64kib.com/redmine/attachments/download/82/Screenshot%20from%202018-06-20%2023-02-19.png!
foft
FO 09:57 PM EclaireXL Bug #67: Pokey two tone timing problem: Nope, seems to be some interaction with the noise filtering. I wonder if the delay also needs applying to the pulse from the timer, that then hits the noise filter. foft
FO 09:27 PM EclaireXL Bug #67: Pokey two tone timing problem: A 2 cycle delay on the reset fixes both the 4 cycle and the 9 cycle case.
Now to check this specific example! foft

FO 09:55 PM EclaireXL Bug #67: Pokey two tone timing problem: I was concerned that my clocks were off at first since I was running in VGA mode, but that changes vsync slightly (50Hz vs 4.86Hz) which of course also impacts audio frequency:-) Debugging in RGB mode gives a perfect match. foft
FO 09:54 PM EclaireXL Bug #67: Pokey two tone timing problem: Been measuring cases on the scope...
Confirmed the extra cycle delays described in that forum post on my 600XL. Confirmed missing on the EclaireXL implementation. foft

FO 08:35 PM EclaireXL Bug #67: Pokey two tone timing problem: Related post: http://atariage.com/forums/topic/118448-implementation-of-pokey-2-tone-filter-in-emulation/page-3#entry1449990 foft

FO 09:09 PM EclaireXL Feature #65: Implement ATA to SPI bridge: What is used in set features?
0xef set features, then set feature 1 + lba mode?
Think this can probably be ignored. foft
FO 09:04 PM EclaireXL Feature #65: Implement ATA to SPI bridge: Identify:0xec
0->SCNT,SNUM,CYLL,CYLH
0xa0->HEAD
0xec >STAT
read stat -> if 0 then does not exist! Then wait for BSY to clear and RDQ to set.
read data -> 512 bytes
See above for the interesting bytes from this. foft
FO 08:53 PM EclaireXL Feature #65: Implement ATA to SPI bridge: https://wiki.osdev.org/ATA_PIO_Mode
Probably want at least DRQ(3/ 1=ready), RDY(6 /1=good) and BSY(7/ 0=not busy) in the status reg foft
FO 08:40 PM EclaireXL Feature #65: Implement ATA to SPI bridge: Some links..
https://www.pjrc.com/tech/8051/ide/wesley.html#idereg
http://atariage.com/forums/topic/279232-fujiconvert-01/page-3
Simple read seems to be:
sector address-> 4 lba regs with $e0 in high part
scnt-> 1
stat-> cmd
data... foft
SA 08:32 PM EclaireXL Feature #71: Add support for user firmware updates: foft wrote:
> Add support to load new firmware from sd card. Then it can be applied immediately for testing or flashed.
> ...
:-) sadosp
FO 08:24 PM EclaireXL Feature #71 (New): Add support for user firmware updates: Add support to load new firmware from sd card. Then it can be applied immediately for testing or flashed.
I'd like this to make it easier to build/test new firmware. foft

SA 09:00 PM EclaireXL Feature #70: Add hotkeys for video mode selection: foft wrote:
> I think its on the right windows key, checking...
I have to see keyboard with two windows keys many years now. Please could you add also this to the standard left window key??? sadosp
FO 08:52 PM EclaireXL Feature #70: Add hotkeys for video mode selection: I think its on the right windows key, checking... foft
SA 08:35 PM EclaireXL Feature #70: Add hotkeys for video mode selection: foft wrote:
> + Added 1,2,3,4 for profile switch + load
Marvelous!
So many keys, but still wait for the day to add the fire key on keyboard!
sadosp
FO 08:19 PM EclaireXL Feature #70: Add hotkeys for video mode selection: + Added 1,2,3,4 for profile switch + load foft
FO 08:12 PM EclaireXL Feature #70 (Closed): Add hotkeys for video mode selection: Will release in v24 foft
FO 08:12 PM EclaireXL Feature #70: Add hotkeys for video mode selection: Added something simple...
Press F11 to go to menu.
Then press:
P: PAL
N: NTSC
R: RGB
A: SCANDOUBLE
D: DVI
H: HDMI
V: VGA
S: SVIDEO
C: COMPOSITE
Z: Toggle composite sync
X: Toggle scanlines
foft
FO 08:10 PM EclaireXL Feature #70 (Closed): Add hotkeys for video mode selection: Been meaning to add a simple way to switch mode from keyboard. foft

FO 06:48 AM EclaireXL Bug #64: Pokey pdm timing incorrect: Anyway v23 sounds nice for pdm, reliably. foft
FO 06:47 AM EclaireXL Bug #64: Pokey pdm timing incorrect: The issue was that the write to stimer was now exactly on the enable cycle. I modified the latch delay line to support this. Fundamentally though, this isn’t meant to happen, so perhaps an issue with the pbi implementation is causing the... foft
FO 06:45 AM EclaireXL Bug #69: Some TVs confused by hdmi audio: See video for example
https://photos.app.goo.gl/c3VMPp0XY7nIaJBG3
Not much to go on. Perhaps the clock regen packets are slightly out of spec or perhaps it does not like the sample rate. foft
FO 06:43 AM EclaireXL Bug #69 (New): Some TVs confused by hdmi audio: foft
FO 06:42 AM EclaireXL Bug #6 (Closed): HDMI audio poor quality: foft

FO 10:07 PM EclaireXL Bug #64: Pokey pdm timing incorrect: Aha, got it... foft
FO 09:58 PM EclaireXL Bug #64: Pokey pdm timing incorrect: Problem with stimer?? foft
FO 09:09 PM EclaireXL Bug #64 (In Progress): Pokey pdm timing incorrect: Reopening, inconsistent timing in calibrate foft
FO 09:07 PM EclaireXL Bug #31 (Closed): HDMI Audio generate high pitch noise (Core 8): foft
FO 09:07 PM EclaireXL Bug #31: HDMI Audio generate high pitch noise (Core 8): Added a low pass filter and this is gone, to be released in v23. foft
FO 09:07 PM EclaireXL Bug #6: HDMI audio poor quality: Wired this up and sounding much better.
Unfortunately @farb seems to have completely different symptoms! https://photos.app.goo.gl/c3VMPp0XY7nIaJBG3. Here jumpman is sounding good, even before the filter.
foft

FO 10:00 PM EclaireXL Bug #6: HDMI audio poor quality: Could look into FIR and IIR filters, but to be honest this seems very lightweight and to work well. Will implement and see what it sounds like! foft
FO 09:58 PM EclaireXL Bug #6: HDMI audio poor quality: Trying out various options in Octave.
sample = current method (just take the current value), flat line at top!
mean = mean of last n samples (which did not meet timing due to expensive division)
meanfpga = mean of last 32 samples (e... foft
FO 09:15 PM EclaireXL Feature #68: Implement stock Atari 800 mode: I agree, not to mention that 4th joystick port's poor fire button. I actually built most of this for the mist a while back. foft

FO 08:35 PM EclaireXL Bug #6: HDMI audio poor quality: Investigating resampling high frequencies to 48KHz with some plots in Octave. The average that I removed wasn't a bad simple low pass filter (though didn't meet timing...). The way I did it (just sample) sucks, quite frankly. Any high fr... foft
FA 11:21 AM EclaireXL Feature #68 (Closed): Implement stock Atari 800 mode: It would be great to have the option of using NTSC, OS-B and 48K to reflect an unmodified Atari 800. There are also older Electronic Arts titles (Archon, M.U.L.E., One on One) that do protection checks for custom O.S. code and those fail... Farb

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