ivop

On one of my machines, I replaced the edge connecter by a pin header. I had a keyboard like yours with true metal wires inside, carefuly removed excessive plastic, and soldered another pin header (of opposite sex) to the flat cable. Now you can detach and attach forever

That's not what I meant. If you use super clean, generated snippetes of say 256 bytes, you do not need to filter it. Just ignore the replay rate and play at your own speed with fixed point math to create different musical frequencies. Filtering is only necessary if you have for example a 44.1kHz 1s sample of a bass, and you want to resample that to 800Hz. Some resampling techniques do this sort-of automatigally. SINC resampling IIRC. I'd say, start simple. Waveform buffer: #$1f (128 times), #$10 (128 times). Volume only, do not set any tonegenerator yet. Now play this buffer round-robin at 800Hz, increase pointer by fixed point math, loop at overflow. Depending the increment of the pointer, you get different sound frequencies. Mixing in the tone generator is for later.

ITYM hijacks Not that I don't make spelling errors, but hiking is something completely different This was at 15.6kHz. At the proposed low replay rate, you can go as low as 16 bytes per period. Perhaps even less, but it complicates the replay routine because of resetting the index register, or LSB with self-modifying code.

That phenomenon is also partly due to the four resistor DAC they used. 36k, 18k, 9k1, and 4k7 (with 5% tolerance), which does not match exact powers of two. Based on 4k7, that should be 37k6, 18k8, 9k4, and 4k7. This could be fixed with a proper R2R ladder of 1K and 2K resistors. Faster rise and fall times, too. Or do what UAV and Mytek's video out circuit do. Proper video DAC, with builtin R2R ladder.

I meant #$10 and #$a0 obviously Also, if you are still going on using true samples, be sure to filter them properly before downsampling. For example, if you are going to replay the samples at 800Hz, 400Hz is the maximum frequency it can capture. It's best too filter out every frequency above that, to avoid aliasing when downsampling to 800Hz. Set a low-pass filter to something like 380Hz with a very sharp knee, or run the filter a few times. After that, normalize to the volume you want.

Sort of. You can store your 4-bit samples with ora'd with $10, and then ora $a0 if you want to hear the tonegenerator, too. Both 256-bytes is enough for a repeating wave to get a pure tone. The 512 bytes I use in AtariSid contains the same 256 bytes twice! That way it is easier, and faster, to index without checking for overflow everytime, at the cost of usiing double the amount of memory.

You don't need to play every channel at 800Hz. Just play 4 times AUDF/AUDC, and AUDCTL, at 50Hz or 60Hz. And then have a certain RMT instrument trigger the volume-only waveform player with a certain wave. And optionaly ORA'd with a tone generator, what emkay means. This is more or less what HARDbass does. And AtariSid6 at a higher replay rate. Don't play full samples, but round-robin a 256 or 512 byte waveform, and jump around with fixed point math. And different waveforms for different volume levels, but I doubt that is necessary for bass lines.

Nice to see the author of the 6502 gcc backend answered, and even fixed a couple of bugs! Perhaps I should resurrect the Atari 8-bit port again, and have it merged as soon as possible, so it'll track the latest gcc sources.

Yes, in Germany, around 1500, they used B to denote what we would call B♭ nowadays. C D E F G A B, where B is flat. Now to unflatten the B, there's this symbol that people familiar with musical notation might recognize: ♮, the natural sign. The unflattened B was denoted as B♮. With a bit of imagination, you can see an H in there. BH, which became H.

H equals B. What do you mean by notes are missing? It's just Z.../ and Q...] with the "black" keys above it in between. For example, G#3 is the 6 key, if you have set the octaves right.

...which doesn't mean you can't order a bunch of Cherry keycaps, and have your own decals printed Generated gerbers and drill files. Now I must overcome my hesitance to order. I'm always afraid I made one tiny mistake And this will be the most expensive PCB order I have ever done. Except for one (the VS1053 waveblaster), all my PCBs worked as expected. But still, you never know. One last look, and I'm going to order anyway. See what happens Edit: Now that was difficult Edit2: Fingers crossed 🤞

Yes, ThinLTO is a compromise for always-enabled LTO. "Normal" LTO does not scale well. ThinLTO does. You were saying Syllable OS took ages to compile, so hence my suggestion to look into this It especially helps if you make only a single change in a 10MLOC project. You still get most of LTO, and you can compile your final version with full LTO.

You might also want to look into ThinLTO, which can be enabled by -flto=thin with clang.

We'll see Note that it has not been tested yet. Also, I have no plans on designing new keycaps. This is meant to replace the wonky mylar with a proper PCB and reuse the original caps.

That was fixed with pre-compiled headers, and link time optimization. Both gcc and clang/llvm do that. Cc65 does not But really, how long does a cc65 compile last anyway, even with shell and make overhead? That won't get significantly shorter with forementioned optimizations, as it is already below a few seconds.

Final version, ready for PCB house. I decided to not pre-drill mounting holes, as there are different mounting frames. It's only 8-16 holes (depending on the frame), that one can drill manually, to get the best fit for your frame. I was surprised that a PCB this size (~120x350mm) is a lot cheaper than I expected. Not in the backplane computer ballpark, by far. Probably $30 for 5 boards, 1.6mm, 2 layers, 1oz, which should be good enough IMHO. And then there's shipping, taxes and custom duties. Sigh... But still, something like $80 for 5 boards to start with, is not that bad. As usual, all files are on github: https://github.com/ivop/project-helena

More progress. This might take precedence over the backplane computer. More or less the same cost as the bare backplane, but with a lot more functionality I already have the Cherry MX switches, and printed 100+ adapters in PETG. Edit: note that SHIFT_L is a 2.5U key, but somehow KiCad had no such footprint (the rest were standard). So a 1.5U is shown here instead, but properly aligned for the left shift key.

That's not dying cats, but dying dogs

Well, you can't know everything

I actually liked the song. Never heard it before, but it has a nice melody IMHO. And the modulation (to confuse emkay even more ) to a different key works pretty good. It sounds like a major fifth up. That would explain why it still worked pretty good with your diatonic tables. Taking request? This is my all time favorite SNES game, and all time favorite SNES soundtrack: https://www.youtube.com/watch?v=IM-A6XN6COQ Better rendition, but without game images: https://www.youtube.com/watch?v=2aNHnshzGG4&list=PL124DAE5BD1B8B7F8 Any tune would do

Yep, I just played a round. Found some chests, kicked some behinds, found a key, a door, but no exit But it looks nice, except for the flickering enemy sprites sometimes, because it seems to be using the same PM as your sword

Yes, this turned out really great! There's a note at circa 1:17 and one at circa 2:34 that sound a bit off. But the rest is SO freaking cool Especially the arpeggios, as I said before. They sound so nice in unison, also with the bass, and the melody.

Cents are confusing. What we were used to, the 12-TET tuning tables that were in the books and the magazines, is specifically compensated for with this alternate tuning, based on the Diatonic tuning. Having 0.0 cents difference, means it was compensated very well I hear what you mean. Especially the two or three portamentos that start at a wolf note do not sound very well

I like it a lot! Especially in the arpeggios you can hear how the relative distance between each note is so much better than 12-TET! You're welcome! I do not have the patience and energy to do this myself. It's nice to see how we all work together to better the pokey sounds This new revival of Pokey stuff, after analmux and raster's passing, started with Synthpopalooza IMHO. That sucks. There are very cheap USB "soundcards" with a headphone jack. Perhaps $3-$5 from China. But that won't help you in the short run Edit: oh, I just now see that emkay also suggested a USB sound adapter

Freezer I understand, but why would SysCheck do that? Can you explain?