Search found 454 matches

by Revenant
Thu Apr 29, 2021 1:14 pm
Forum: SNESdev
Topic: WAI instruction
Replies: 18
Views: 1259

Re: WAI instruction

An ABORT always calls the interrupt handler, but does not end a WAI instruction But that is the thing, the datasheet states the ABORTB does end a WAI instruction, when I is set. So the I does modify behavior other than IRQB. The ABORT does technically end the WAI instruction, but after the interrup...
by Revenant
Wed Apr 28, 2021 2:13 pm
Forum: SNESdev
Topic: WAI instruction
Replies: 18
Views: 1259

Re: WAI instruction

To try and put it simply: An NMI or RESET always ends a WAI instruction, and always calls the interrupt handler An IRQ always ends a WAI instruction, but only calls the interrupt handler if I=0 An ABORT always calls the interrupt handler, but does not end a WAI instruction The ABORT behavior is diff...
by Revenant
Mon Apr 26, 2021 1:03 pm
Forum: SNESdev
Topic: 65C816 native to emulation mode switch
Replies: 2
Views: 496

Re: 65C816 native to emulation mode switch

D remains untouched in emulation mode, but behaves a little differently in emulation mode: indexed addresses will wrap-around within a single page if D is page-aligned (i.e. the lower byte of the register is zero), otherwise it behaves the same as in native mode. Here is the implementation in bsnes,...
by Revenant
Mon Apr 12, 2021 12:10 pm
Forum: NESdev
Topic: NFT/Blockchain ROMS
Replies: 27
Views: 6116

Re: NFT/Blockchain ROMS

What actual tangible benefit is this supposed to provide to anybody in the nesdev community? You mention three things behind the idea: "digital collectibles", which people are somehow supposed to believe are "collectible" even though digital goods are all trivially duplicatable (not to mention that ...
by Revenant
Tue Apr 06, 2021 1:03 pm
Forum: SNESdev
Topic: SNES Music Pack 1 by Resistance
Replies: 17
Views: 3559

Re: SNES Music Pack 1 by Resistance

Nikku4211 wrote:
Tue Apr 06, 2021 7:14 am
Well, I was talking about the quality of the samples after conversion, as I am interested in how the quality turned out on the SNES itself.
I assume snesmod didn't touch any of the ones that were below 32kHz, but I'm not sure if it automatically downsamples anything above that or not.
by Revenant
Mon Apr 05, 2021 8:10 pm
Forum: SNESdev
Topic: SNES Music Pack 1 by Resistance
Replies: 17
Views: 3559

Re: SNES Music Pack 1 by Resistance

It does look a bit wide now that you mention it, though; I guess I just got accustomed to my USB captures looking that way. I'll have to fiddle around with it next time I'm recording something. Anyway, not to get on too much of a tangent: Also those samples are really high quality. Are they all 22-3...
by Revenant
Mon Apr 05, 2021 12:04 pm
Forum: SNESdev
Topic: SNES Music Pack 1 by Resistance
Replies: 17
Views: 3559

Re: SNES Music Pack 1 by Resistance

I'm not really sure why PAL aspect ratios are relevant, considering I recorded that video off of an NTSC console via S-Video.

(as for why the video has the aspect ratio it does: beats me. I just record what my capture device gives me.)
by Revenant
Mon Apr 05, 2021 10:26 am
Forum: SNESdev
Topic: BS-X Satellaview Broadcast Frequency?
Replies: 5
Views: 2065

Re: BS-X Satellaview Broadcast Frequency?

Yeah, it should boot up fine without a memory pack inserted, you'll just get an error screen if you actually attempt to load up a game.
by Revenant
Sun Apr 04, 2021 9:28 pm
Forum: SNESdev
Topic: BS-X Satellaview Broadcast Frequency?
Replies: 5
Views: 2065

Re: BS-X Satellaview Broadcast Frequency?

The Satellaview doesn't listen on satellite broadcast frequencies at all. It only reads the bitstream output from an external satellite receiver, which you had to purchase separately. Theoretically, that bitstream can be generated by anything, which there has been some experimentation with somewhat ...
by Revenant
Sun Apr 04, 2021 5:29 pm
Forum: SNESdev
Topic: SNES Music Pack 1 by Resistance
Replies: 17
Views: 3559

SNES Music Pack 1 by Resistance

I helped put together a new collection of SNES music for the wild compo at Revision 2021. ( Two SNES releases at one party?!) Download: http://resistance.no/releases/snes/RSE-SNESMusicPack1.zip Info: http://demozoo.org/productions/292453/ https://www.pouet.net/prod.php?which=88630 Video: https://rev...
by Revenant
Sun Apr 04, 2021 5:23 pm
Forum: SNESdev
Topic: Revision 2021 SNES Demo
Replies: 6
Views: 2532

Re: Revision 2021 SNES Demo

This was naturally one of my favorites at the party. Nice work!

I agree with lidnariq, very nice demonstration of what you can do with a good mode 7 packed-pixel setup.
by Revenant
Sun Mar 14, 2021 3:23 pm
Forum: SNESdev
Topic: Need guidance with nes to snes.
Replies: 286
Views: 47657

Re: Need guidance with nes to snes.

TSB/TRB (and others) are what are called "read-modify-write" instructions.

You can think of TRB as basically being a quicker way to do this:

Code: Select all

lda $xxxx
and #$nn
sta $xxxx
by Revenant
Sun Mar 14, 2021 2:13 pm
Forum: SNESdev
Topic: Need guidance with nes to snes.
Replies: 286
Views: 47657

Re: Need guidance with nes to snes.

TSB and TRB cannot be used to modify write-only registers. (It looks like this has been mentioned at least twice in this thread already...)
by Revenant
Fri Aug 07, 2020 11:34 am
Forum: NESemdev
Topic: Disch has passed away
Replies: 30
Views: 18803

Re: Disch has passed away

Very unfortunate news. I don't remember if I ever really talked with Disch personally, but it was always apparent that he was one of the foundational people in the scene even back when I was first dipping my toes into the world of ROM hacking and homebrew back in the early 2000s. My condolences to h...
by Revenant
Sun May 03, 2020 4:37 pm
Forum: SNESdev
Topic: bsnes-plus and xkas-plus (new debugger and assembler)
Replies: 210
Views: 189960

Re: bsnes-plus and xkas-plus (new debugger and assembler)

Here's the issue in question, if anybody's curious: https://github.com/devinacker/bsnes-plus/issues/252 Turns out it's not an emulation bug, but rather a fairly obscure caveat. It's pretty well known that you can't use $211b for multiplication during mode 7, but as it turns out, multiplications can ...