Search found 22065 matches

by tepples
Thu Dec 10, 2020 9:28 am
Forum: NESdev
Topic: .fds format: Can checksums be heuristically detected?
Replies: 51
Views: 17582

Re: .fds format: Can checksums be heuristically detected?

I imagine "Can I use an FDS transport to dump a DataDisk for my Smith-Corona Personal Word Processor?" isn't part of the scope of this. (Unless someone wants to make it so.)
by tepples
Thu Dec 10, 2020 8:34 am
Forum: NESdev
Topic: .fds format: Can checksums be heuristically detected?
Replies: 51
Views: 17582

Re: .fds format: Can checksums be heuristically detected?

anikom15 wrote:
Thu Dec 10, 2020 12:20 am
It’s not uncommon for extensions to mean fuckall anyway. The fact Windows uses extensions to decide what program to launch is [careless] in the first place.
I'd be interested to discuss a replacement for the file extension (or file name suffix) in this topic.
by tepples
Thu Dec 10, 2020 8:34 am
Forum: General Stuff
Topic: Determining a file's content type without extension
Replies: 14
Views: 2166

Determining a file's content type without extension

It’s not uncommon for extensions to mean fuckall anyway. The fact Windows uses extensions to decide what program to launch is [careless] in the first place. I'd be interested to discuss a replacement for the file extension (or file name suffix). Let me first define what problems there are so we kno...
by tepples
Wed Dec 09, 2020 8:38 pm
Forum: NESdev
Topic: Vs System Shared Memory
Replies: 48
Views: 6113

Re: Vs System Shared Memory

The volatile keyword is exactly what the GBA homebrew scene uses to write to registers from C code.
by tepples
Wed Dec 09, 2020 10:14 am
Forum: General Stuff
Topic: Super Mario Bros.: Why all the floating money?
Replies: 77
Views: 10048

Re: Super Mario Bros.: Why all the floating money?

Nikku4211 wrote:
Wed Dec 09, 2020 9:06 am
Lol, that's probably why they put mushrooms in Mario, though in none of the Mario games are they white.
At least not until Super Mario Galaxy (2007), where the white mushroom turns Mario into a spirit creature.
by tepples
Wed Dec 09, 2020 8:13 am
Forum: General Stuff
Topic: Super Mario Bros.: Why all the floating money?
Replies: 77
Views: 10048

Re: Super Mario Bros.: Why all the floating money?

Moreover - russian mycologist says it is safe to eat after two boilings: https://youtu.be/FppuDnKe5zc (video is in russian, so it's just for picture of him boiling these). Psychoactive properties and toxicity are reduced greatly after that. However he also admits (hints) that he used them in 'recre...
by tepples
Tue Dec 08, 2020 8:13 am
Forum: NESdev
Topic: Help on define MMC3 mapper with 8 PGR roms and CHR RAM with CC65.
Replies: 25
Views: 4440

Re: Help on define MMC3 mapper with 8 PGR roms and CHR RAM with CC65 (50 USD bounty).

In practice, you don't need to worry about an operating system on the NES. But for the sake of completeness: Occasionally there's an OS of sorts. A multicart has its menu, for instance, and Nintendo World Championships has its shell and countdown timer. I admit these are uncommon situations, and any...
by tepples
Tue Dec 08, 2020 7:00 am
Forum: Homebrew Projects
Topic: NESTUDIO - PCM Sample Based Drum Machine
Replies: 15
Views: 2562

Re: NESTUDIO - PCM Sample Based Drum Machine

One advantage of actually using a Zapper, though, is that this sort of "optical sync" electrically isolates the drum machine from any possible ground noise. (Incidentally, it's the same reason MIDI inputs use an optoisolator.)
by tepples
Mon Dec 07, 2020 11:02 pm
Forum: General Stuff
Topic: Super Mario Bros.: Why all the floating money?
Replies: 77
Views: 10048

Re: Super Mario Bros.: Why all the floating money?

The sense of time I got when playing SMB1 during the commercial era is that each world must take one-third of a day to run, as WORLD 3 and WORLD 6 have a black background above ground. Presumably after Mario undoes the fetters on the retainer's feet, he gets a chance to eat and rest for the next wor...
by tepples
Mon Dec 07, 2020 3:16 pm
Forum: Homebrew Projects
Topic: NESTUDIO - PCM Sample Based Drum Machine
Replies: 15
Views: 2562

Re: NESTUDIO - PCM Sample Based Drum Machine

One plausible sync interface could pretend to be the Zapper light sensor. Then you can read $4017 bit 3: $00 means light or disconnected, and $08 means dark.
by tepples
Mon Dec 07, 2020 3:09 pm
Forum: Other Retro Dev
Topic: How does the Genesis handle resets, compared to Nintendo consoles?
Replies: 25
Views: 3120

Re: How does the Genesis handle resets, compared to Nintendo consoles?

I forget: Does asserting /VRES during the TMSS screen cause the TMSS screen to be skipped? If so, a mapper could assert /MRES, wait maybe 50 ms, and assert /VRES.
by tepples
Sun Dec 06, 2020 10:40 pm
Forum: NESemdev
Topic: PPU memory read buffer is not the open bus?
Replies: 8
Views: 1263

Re: PPU memory read buffer is not the open bus?

There are three separate 8-bit registers CPU Open Bus - Returned when nothing is decoded for reading at a particular CPU address PPU I/O Data Bus - Returned whenever reading any PPU register PPU Memory Read Buffer - Used only for reading $2007 Reading a write-only PPU register, or reading unused bit...
by tepples
Sun Dec 06, 2020 5:55 pm
Forum: Homebrew Projects
Topic: Our new NES project (and a question)
Replies: 12
Views: 1818

Re: Our new NES project (and a question)

A U.S. patent on ornamental nonfunctional design of a product expires 15 years after issue. Apart from Morocco, no country on this list grants exclusive rights in industrial design that subsist more than 25 years.
by tepples
Sun Dec 06, 2020 1:01 pm
Forum: NESdev
Topic: Weird SMB3 pirate cart
Replies: 10
Views: 1747

Re: Weird SMB3 pirate cart

From world 1 you go to 2, 3, or 4.
From 2, 3, 4, 5, or 6 you go to 5, 6, or 7.
From 7, 8, or 9 (the warp zone itself) you go to 8.
by tepples
Sun Dec 06, 2020 12:34 am
Forum: General Stuff
Topic: Super Mario Bros.: Why all the floating money?
Replies: 77
Views: 10048

Super Mario Bros.: Why all the floating money?

The Super Mario Bros. manual explains that Koopa Troop turned most Toads into [?] blocks and imprisoned those who could work to reverse the damage (Princess Peach and her seven retainers). Its description of Goomba ("a mushroom who betrayed the Mushroom Kingdom") vaguely implies what brought in Koop...