Search found 6 matches

by FavoritoHJS
Wed Dec 06, 2023 11:34 pm
Forum: CX16 General Chat
Topic: Ideas from similar projects.
Replies: 6
Views: 16903

Re: Ideas from similar projects.

fair enough, just thought that these would be interesting to look at since I didn't know y'all had it all figured out already - especially the FM synth replacement, as a mere outsider I would have thought there was no progress, especially since the thread about it hadn't been updated in a while. Guy...
by FavoritoHJS
Wed Dec 06, 2023 7:42 pm
Forum: CX16 General Chat
Topic: Ideas from similar projects.
Replies: 6
Views: 16903

Ideas from similar projects.

note for admins: can you tell me if this breaks rule 3.C? I hope not, not the least because the former is meant to be DIY-only and the latter is very likely to remain on the drawing board. So, while idling around on the mastodons, I found 2 interesting projects that seem to be in effect forks of the...
by FavoritoHJS
Mon Dec 04, 2023 3:23 pm
Forum: X16 Feature Requests
Topic: Tile Mode Opacity Toggle and Fine Bitmap Address Start
Replies: 0
Views: 31522

Tile Mode Opacity Toggle and Fine Bitmap Address Start

Here are 2 ideas I had, lumped together because they are both related to rendering. Tile Mode Opacity Toggle: Uses bit 7 of the layers HSCROLL_H (or some other unused per-layer bit), if set, color 0 is not special-cased for palette index shifting, so if Palette offset is not 0, the first color will ...
by FavoritoHJS
Fri Nov 17, 2023 3:35 pm
Forum: X16 Feature Requests
Topic: Will YMF825 (SD-1) be the ultimate answer to YM2151 (and maybe ymf262)shortage?
Replies: 31
Views: 50010

Re: SD-1 [...] More thinking about what would be required.

After some thinking... yea no. To keep up with a single OPL3 will require calculating an operator in 8 cycles or less - good luck doing that with a DSP that isn't more expensive than an FPGA solution... unless you can get the DSP running at 6x input clock speed? After all, most DSPs, even cheap ones...
by FavoritoHJS
Fri Nov 10, 2023 9:24 pm
Forum: X16 Feature Requests
Topic: Extra PSG waveforms
Replies: 0
Views: 10266

Extra PSG waveforms

Now, I know this probably won't fit in the small amount of FPGA left in the VERA, just throwing out ideas that might be viable with sufficient effort for a future revision that might have more space for logic. 1) XORed triangle, basically what tildearrow's [em]tildearrow sound unit[/em] does for wav...
by FavoritoHJS
Fri Oct 27, 2023 8:53 pm
Forum: X16 Feature Requests
Topic: Will YMF825 (SD-1) be the ultimate answer to YM2151 (and maybe ymf262)shortage?
Replies: 31
Views: 50010

The SD-1 is dead... but DSP chips are not dead yet?

Sorry for committing thread necromancy, but i have a question, would a dedicated DSP chip (because those still exist for some reason) be cheaper than an FPGA large enough to hold an OPM emulation? If so, I wonder if you could program a DSP chip so it can do "frequency" (read: phase) modula...