Activity

From 05/31/2018 to 06/29/2018

09:44 PM 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 ou... foft

10:03 PM 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... foft
09:57 PM 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 f... foft
09:27 PM 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

09:55 PM 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 (50... foft
09:54 PM 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. Co... foft

08:35 PM 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#entry... foft

09:09 PM 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 igno... foft
09:04 PM 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 B... foft
08:53 PM 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) ... foft
08:40 PM 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-fujiconv... foft
08:32 PM 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 flash... sadosp
08:24 PM 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... foft

09:00 PM 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... sadosp
08:52 PM Feature #70: Add hotkeys for video mode selection: I think its on the right windows key, checking... foft
08:35 PM 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 a... sadosp
08:19 PM Feature #70: Add hotkeys for video mode selection: + Added 1,2,3,4 for profile switch + load foft
08:12 PM Feature #70 (Closed): Add hotkeys for video mode selection: Will release in v24 foft
08:12 PM 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... foft
08:10 PM Feature #70 (Closed): Add hotkeys for video mode selection: Been meaning to add a simple way to switch mode from keyboard. foft
08:14 PM Core v24: Very small change since I've realized how annoying the video mode selection is (i.e. find sd card, copy on settings..... foft

06:48 AM Bug #64: Pokey pdm timing incorrect: Anyway v23 sounds nice for pdm, reliably. foft
06:47 AM 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 suppor... foft
06:45 AM 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 pa... foft
06:43 AM Bug #69 (New): Some TVs confused by hdmi audio: foft
06:42 AM Bug #6 (Closed): HDMI audio poor quality: foft

06:28 PM Core v23: A small update, mostly for farb to test HDMI audio
* Add low pass audio filter, massively reduces HDMI audio high ... foft

10:07 PM Bug #64: Pokey pdm timing incorrect: Aha, got it... foft
09:58 PM Bug #64: Pokey pdm timing incorrect: Problem with stimer?? foft
09:09 PM Bug #64 (In Progress): Pokey pdm timing incorrect: Reopening, inconsistent timing in calibrate foft
09:07 PM Bug #31 (Closed): HDMI Audio generate high pitch noise (Core 8): foft
09:07 PM 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
09:07 PM Bug #6: HDMI audio poor quality: Wired this up and sounding much better.
Unfortunately @farb seems to have completely different symptoms! https://p... foft

10:00 PM 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 an... foft
09:58 PM Bug #6: HDMI audio poor quality: Trying out various options in Octave.
sample = current method (just take the current value), flat line at top!
me... foft
09:15 PM 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... foft

08:35 PM 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... foft
11:21 AM 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 o... Farb

10:15 PM Bug #31: HDMI Audio generate high pitch noise (Core 8): HDMI audio is sounding better now in general (signed/unsigned). This high pitched noise is still heard in some cases ... foft
10:06 PM Core v22: Received my board today.
I tried to understand the flash chip problems. All I found so far is that it has a 64KB s... foft
08:27 PM Bug #66: Odd flash behaviour on new boards: Flashing a new PDM is very clear that the board is erasing in 64KB blocks. That does not explain the core corruption ... foft
08:01 PM Bug #6: HDMI audio poor quality: The biggest issue with this appears to be that I need to send signed samples. Changed that and its sounding much better. foft

10:46 AM Bug #64 (Closed): Pokey pdm timing incorrect: Seems to run fine, Acid now passes again as far as I can tell. admin
08:24 AM Bug #64: Pokey pdm timing incorrect: Been checking on the scope. The one cycle delay looks correct.
Some jitter issues due to when I activate pokey. I wa... foft
10:42 AM Bug #67 (Resolved): Pokey two tone timing problem: An old bug.. See http://atariage.com/forums/topic/228527-pokey-emulation/page-3#entry3060595
10 P=53760
20 POKE P... admin

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