EclaireXL

11/17/2019

FO 09:10 PM Feature #84: Add SID

Attaching some of the octave files from investigating this for reference + the wave files + other useful bits I found online. foft

FO 09:07 PM Feature #84: Add SID

Did some research over the weekend. Generating these isn't a terribly trivial problem!
I tried for some time to generate in matlab. I came up with a pretty good solution for wave 3: triangle + sawtooth. Actually its sawtooth + 2 sawto... foft

11/12/2019

FO 10:19 PM Feature #84: Add SID

It sounds good to me, but not sure what it is meant to sound like!! foft

FO 10:19 PM Feature #84: Add SID

Also wondering if the clk frequency is important (not enable), I see some state table increment on every clock, which is reset on enable foft

FO 10:18 PM Feature #84: Add SID

Wondering about some kind of bit map of unpopulated locations (reducing locations) or a 2nd lookup layer (reducing bits)
foft

FO 10:04 PM Feature #84: Add SID

I loaded the tables in to octave to take a look.
Observations...
* Not a simple curve
* Lots of zeros, >80% in some cases
* Quite a lot of dupes
dupes:
>> log2(numel(unique(ps)))
ans = 6.5699
> ...
ans = 4.7549
>> log2(n... foft

FO 10:02 PM Feature #84: Add SID

Actually the issue with fitting in v2 is block ram, not ALMs. Though its always good to save ALMs!
The sid tables take 14KB each. So for stereo sid its 28KB. Anyway I do not even have 14KB to spare on v2... foft

11/09/2019

FO 10:05 AM Feature #84: Add SID

Also got this potential USB sharing, that'd save 750 ALMS. Each request/reply is host initiated, so no reason can't share one. Keepalives would need to go to both ports. Not sure how complex that'd be! Perhaps I plumb the output to both,... foft

FO 10:03 AM Feature #84: Add SID

600 alms each, will use mono sid I guess. Or make it a generic and enable on the larger boards? foft

FO 10:00 AM Feature #84: Add SID

Logic utilization (in ALMs) 9,808 / 9,430 ( 104 % ) foft

FO 09:56 AM Feature #84: Add SID

Have a dual 8250 working, though it doesn't fit in the smaller boards. Investigating why, memory or logic... foft

FO 09:56 AM Feature #84 (New): Add SID

Agreed to try adding a SID to the pokeymax.
Eclaire is a good test bed for this, so starting out with that foft

FO 10:00 AM Bug #69: Some TVs confused by hdmi audio

Hias had some clever approaches, capturing the digital audio out from the tv etc foft

FO 09:59 AM Bug #69: Some TVs confused by hdmi audio

I dug into this a bit with Hias. It turned out the issue for him was noise from the dac, so distinct issue. Though I had changed the HDMI component somewhat to be I think closer to spec. Would be curious if it helped on these screens. foft

FO 09:58 AM Feature #32: option to connect the original ATARI XL keyboard to ExclairXL

Panos kindly sent me the boards he designed. I put together the bom on mouser and digikey. will order some parts and try to build later this year.
There might also be another secret project (shhhhh) foft

FO 09:55 AM Feature #51: Debug port

Now I have the saleae I figure I can stream this more reliably to the PC. Will have a go at this soon... Perhaps I write a protocol decoder plugin? foft

FO 09:54 AM Feature #82: Setting for mono pokey

With adding sid should probably allow that to be on/off too.
pokey 1/2
sid 0/1
2 bits? foft

FO 09:44 AM Bug #83: Many USB hubs do not work

Just did a bit more testing. Two hubs, two keyboards and a joystick. Fiddled with unplugging/re-plugging etc and all seeming good now. foft

11/08/2019

FO 10:58 PM Bug #83 (Closed): Many USB hubs do not work

foft

FO 10:57 PM Bug #83 (Resolved): Many USB hubs do not work

foft

FO 10:54 PM Bug #83: Many USB hubs do not work

Got it, I needed to set the line control earlier on. It was set to 'NORMAL' after the reset and this leads to the SET_ADDRESS being ignored. foft

11/07/2019

FO 10:53 PM Bug #83: Many USB hubs do not work

This setup is so much better for debugging than on the Eclaire. I have gdb on linux to debug the binary, I can printf to the terminal and I can see the packets with the saleae. If I can't fix it now then... Still sure it'll take me some ... foft

FO 10:49 PM Bug #83: Many USB hubs do not work

The hub is detected as connected, then it tries to set the address and fails.
So, the keyboards I'm using are low speed, while the hub I'm using is full speed.
On the low speed I see SE0, followed by JKJKJK (i.e. sync)
On the high s... foft

FO 10:07 PM Bug #83: Many USB hubs do not work

OK, circuit build and wired up. I can type on the sockit.
Now to get some debugging in place and try the hub. foft