Registered on 2022-10-19 09:15:20 UTC
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17 comments total, 10 shown | Page 1 2
Response to a comment by prochazkaml (Administrator) on Moving domains – goodbye prochazka.ml | Posted on 2023-03-30 12:15:27 UTC
yeah, I feel ya
Comment on Moving domains – goodbye prochazka.ml | Posted on 2023-03-30 12:14:55 UTC
aaaaaaaaaaaaaaaaa pain
Response to a comment by Mik on The Journey To MODPlay | Posted on 2022-10-10 13:44:05 UTC
Hi Mik, thank you!
The issues you are experiencing are probably caused by your browser, as the MODPlay web app is just the C source code compiled to run in a browser. The web app should output identical audio compared to the "native" MODPlay library. I have personally experienced no issues with the web app (using Brave, which is based on Chromium).
I even managed to get a copy of the mod file you mentioned (file size matches), and after the long loading period, it plays exactly the same as with libopenmpt.
Response to a comment by MottZilla (Archived from PSXDEV.net) on DIYing a plug that fits the PlayStation's parallel port to boot from a ROM - part 14 | Posted on 2022-03-15 13:31:33 UTC
Yeah, you're right. I just needed to vent a bit, I realize now that it would be quite a shame to throw all of this work away. Sorry about that.
And I agree with the choice of the connector pins, old component legs were quite a terrible idea indeed.
I've looked a bit into real connector designs, and the pins for this sort of connector are usually made of brass. It's way more flexible than the component legs, which were quite stiff, in the worst case bending the pins inside the console. But for my defense, I really don't have anything better lying around at home, so this was the first thing that jumped to mind.
However, sourcing such brass pins is a whole other problem. How would someone even search for such a thing? "Brass connector pins" yielded me with expensive 2.54 mm pitch pogo pins, and "thin brass wire" (in case I would have to make them myself) got me results with 1 mm thickness or higher, which is way too thick for our purpose.
Response to a comment by MottZilla (Archived from PSXDEV.net) on DIYing a plug that fits the PlayStation's parallel port to boot from a ROM - part 14 | Posted on 2022-03-14 05:21:59 UTC
I know, but I do not have anything more appropriate lying around (at least I don't think I do).
Response to a comment by masterg0r0 (Archived from PSXDEV.net) on DIYing a plug that fits the PlayStation's parallel port to boot from a ROM - part 13 | Posted on 2022-03-13 16:28:53 UTC
Thanks.
Response to a comment by MottZilla (Archived from PSXDEV.net) on DIYing a plug that fits the PlayStation's parallel port to boot from a ROM - part 12 | Posted on 2022-03-10 18:25:49 UTC
Or I can just use a 3.5 V-compatible EEPROM (or rather Flash) to begin with. The SST39VFXXX series looks like a good candidate, since it's quite cheap, it appears to have less latency than the SST29 series and most importantly, it's currently in stock available to buy immediately from all major distributors (Mouser, DigiKey, Farnell – they offer really low shipping rates to the Czech Republic (around 7 €), so it has been the most convenient one for me in the past). Just look around the internet for "SST39VF" (the "VF" is quite important here, as it means that the chip is rated to run at up to 3.6 V), you can find them very easily.
The highest capacity one from the series (512 kB) goes for just 2 € including VAT. So if I get my EEPROM working, I'll definitely buy a few of these and I'll redesign the PCB to fit a PLCC socket for these chips instead, removing the need for the on-board voltage regulator.
Response to a comment by MottZilla (Archived from PSXDEV.net) on DIYing a plug that fits the PlayStation's parallel port to boot from a ROM - part 12 | Posted on 2022-03-07 06:04:02 UTC
Eh, fair enough. Still a crappy practice though.
I know that a level shifter IC would be ideal, but for the time being (before I get one), the resistors should work fine.
Response to a comment by MottZilla (Archived from PSXDEV.net) on DIYing a plug that fits the PlayStation's parallel port to boot from a ROM - part 12 | Posted on 2022-03-06 20:39:50 UTC
Thank you for the feedback!
The premature failure worries me as well, and I am shocked that ROM carts back in the day did this.
I had a quick thought, and wouldn't a simple voltage divider get the 5 V coming out of the EEPROM down to ~3.5 V quite easily? E.g. 10k going to the output pin, 22k to GND and the middle to the PlayStation? That would yield ~3.4 V, which should work, right?
And you bet there's a case coming, but that's not high priority at the moment, as I am still trying to figure the actual circuit out. 😀
Response to a comment by MottZilla (Archived from PSXDEV.net) on DIYing a plug that fits the PlayStation's parallel port to boot from a ROM - part 11 | Posted on 2022-03-06 19:20:20 UTC
Thanks! 😁
It might be possible to do this with the PSIO as well. Can't verify it, though.
And yeah, I should definitely get a real EEPROM programmer for future projects.
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