EclaireXL

06/19/2018

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

06/14/2018

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

06/11/2018

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

06/10/2018

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

06/07/2018

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

06/06/2018

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

06/05/2018

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

06/04/2018

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

06/03/2018

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

06/02/2018

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

06/01/2018

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

05/29/2018

10:07 PM Bug #64: Pokey pdm timing incorrect

Tried a 1 cycle and a half cycle delay on the input to the xor. Neither are seeming quite right, but 1 cycle delay is... foft

08:21 PM Bug #64: Pokey pdm timing incorrect

Phaeron got a scope on it:
http://atariage.com/forums/topic/244946-using-pulse-density-modulation-for-8-bit-pcm/page... foft

05/28/2018

09:52 PM Bug #66: Odd flash behaviour on new boards

Gathering ids on other boards in case I need to switch on that: [[Flash_chip_by_board]] foft

09:49 PM Bug #6: HDMI audio poor quality

# Is the time between this always the same? If so can dIs the sound quality poor because I removed the divide?
# If ... foft

05/26/2018

09:14 PM Warning: flash chip on new boards

I have not received my new board yet so have yet to test the new flash chip (S25FL127SABMFV000). So, unless you have ... foft

09:11 PM Bug #66 (Closed): Odd flash behaviour on new boards

Ensure that the new flash chip is stable with the existing firmware strategy. It has some hybrid 64k/4k sector option... foft

03:28 PM V21

Not so many features on this version, but I think it is a worthwhile one!
* RPD flashing support
So what is it... foft

05/25/2018

06:31 AM Feature #65: Implement ATA to SPI bridge

Above was info from flashjazzcat on the forum foft

06:30 AM Feature #65: Implement ATA to SPI bridge

I need to prepare a document outlining the minimum requirements of IDE emulation since I'm explaining the same thing ... foft

05/24/2018

08:52 PM Feature #65: Implement ATA to SPI bridge

foft wrote:
> There is plenty of software for the Atari which accesses ATA hard drives via a simple register interfa... sadosp

08:44 PM Feature #65 (New): Implement ATA to SPI bridge

There is plenty of software for the Atari which accesses ATA hard drives via a simple register interface. Find out wh... foft

05/22/2018

09:25 PM New boards

The new boards are ready and shipped. So I'm hoping to see more activity here when they start to arrive. Also now thi... foft