Search found 22586 matches

by tepples
Sat Mar 23, 2024 3:25 pm
Forum: SNESdev
Topic: Vortex
Replies: 5
Views: 435

Re: Vortex

As far as I'm aware, the only known difference between GSU-1 and GSU-2 revisions is that the maximum memory size increased from 1 MiB to 2 MiB. The other silicon improvements had already landed between MARIO and GSU-1.

Were you envisioning speeding up the game through use of a lot more lookup tables?
by tepples
Fri Mar 22, 2024 9:40 pm
Forum: NES Graphics
Topic: Palette collection
Replies: 5
Views: 792

Re: Palette collection

2C03, 2C04, and 2C05 produce RGB signal. 2C03 is the "normal" one in the PlayChoice, the four variants of 2C04 have scrambled palettes to copy-protect Vs. System games, most 2C05 have swapped $2000 and $2001 and ID bits in $2002 (also for copy protection), and 2C05-99 is in Sharp's Famicom...
by tepples
Fri Mar 22, 2024 6:05 am
Forum: NESemdev
Topic: Mesen - Emulator
Replies: 423
Views: 253971

Re: Mesen - Emulator

It might have something to do with the fact that Sour uses this topic as Mesen 2's issue tracker instead of using the issue tracker provided by GitHub.
by tepples
Fri Mar 08, 2024 1:18 pm
Forum: General Stuff
Topic: New York Times issues takedowns over word guessing game
Replies: 4
Views: 308

New York Times issues takedowns over word guessing game

Charles Reid's 1973 BASIC game Word was first published in 101 BASIC Computer Games by Digital Equipment Corp. in 1973. AtariArchives.org has a scan of its listing and a sample output . It was adapted to a TV game show called Lingo in 1987 and a Game Boy game of the same name in 1994. This month (Ma...
by tepples
Tue Feb 27, 2024 12:58 pm
Forum: NES Hardware and Flash Equipment
Topic: NES Peritel cable in scart port doesn't show properly on my TV
Replies: 5
Views: 380

Re: NES Peritel cable in scart port doesn't show properly on my TV

A standard 15.625 kHz by 50 Hz video signal (PAL, SECAM, SCART) is interlaced. Even lines of the picture are drawn during one field, and the odd lines between them are drawn 20 milliseconds later in the next field, alternating between even and odd fields to fill all 576 lines. This is called 576-lin...
by tepples
Sat Feb 24, 2024 9:21 pm
Forum: NESdev
Topic: MMC5 and third pattern nametable
Replies: 30
Views: 2323

Re: MMC5 and third pattern nametable

"X=1" means horizontal position equals 1.

In other words, a third consecutive read from the same nametable address means the MMC5 knows that the PPU is performing the kind of memory read that the PPU typically performs during the first two pixels of a scanline.
by tepples
Wed Feb 21, 2024 4:07 pm
Forum: General Stuff
Topic: Public transit
Replies: 10
Views: 678

Re: Public transit

SMS is opening a program on an electronic device, tapping keys or a virtual keyboard to enter text in a box, and then hitting a send button. Email is opening a program on an electronic device, tapping keys or a virtual keyboard to enter text in a box, and then hitting a send button. Why the two liv...
by tepples
Mon Feb 19, 2024 4:39 pm
Forum: General Stuff
Topic: San Guo Zhi discussion
Replies: 5
Views: 358

San Guo Zhi discussion

Edit by Fiskbit: This is split off from this thread to avoid distracting from its intended topic. "San Guo Zhi" sounds like "Sangokushi" [三國志], and I'm pretty sure that's on purpose. To what extent do the events of this game overlap those of either Koei's or Namco's Romance of t...
by tepples
Sun Feb 18, 2024 1:47 pm
Forum: General Stuff
Topic: Public transit
Replies: 10
Views: 678

Public transit

Preemptive split from another topic to air grievances about public transit That said, public transit is a thing too Not in my city right now. The bus service here has 58 days of scheduled downtime per year: the 52 Sundays and six major holidays. Today is a Sunday. At least on those days when it is i...
by tepples
Fri Feb 16, 2024 9:05 am
Forum: NESdev
Topic: Linux on NES
Replies: 22
Views: 9835

Re:

Tying related topics together: Oh noes, teh police! HIDE TEH LUNIX!!!11 True, LUnix is not Linux, but could it or Contiki 1.x be made to run well on a RAM cart like the PowerPak? I guessed right. Nearly a decade and a half later, someone ported LUnix. The 9-minute video by decrazyo ( its transcript ...
by tepples
Thu Feb 08, 2024 8:57 am
Forum: NESdev
Topic: WideNES proposal for cross-releasing NES games on modern platforms
Replies: 15
Views: 1550

Re: WideNES proposal for cross-releasing NES games on modern platforms

One thing not detailed here is that some games will play differently with widescreen. Lidnariq did the obvious case, where 4:3 viewers will see less than the 16:9 viewers will. But the one not mentioned is things like spawning enemies. A good comparison case would be Rockman 11 vs. its earlier 4:3 ...
by tepples
Wed Feb 07, 2024 6:37 pm
Forum: SNESdev
Topic: Two separate moving objects out of one background?
Replies: 23
Views: 1828

Re: Two separate moving objects out of one background?

If anything, I'd suggest seeing if a program can use wai to synchronize to within a pixel or two after a horizontal interrupt.
by tepples
Sun Feb 04, 2024 7:30 pm
Forum: NESdev
Topic: WideNES proposal for cross-releasing NES games on modern platforms
Replies: 15
Views: 1550

Re: WideNES proposal for cross-releasing NES games on modern platforms

Now we're considering making it 352 pixels wide, which is 1. a bit wider (so less black border) and 2. a multiple of 32 pixels wide for a whole number of attribute bytes. And the case for moving high X to bit 4 is reasonable. Padding some existing games to 352×224 and putting them on a 720p screen m...
by tepples
Sat Feb 03, 2024 9:32 am
Forum: NESemdev
Topic: Best emulator approach for the long-run: ROM metadata database? Heuristics? Both?
Replies: 11
Views: 1181

Re: Best emulator approach for the long-run: ROM metadata database? Heuristics? Both?

[This may make slightly less sense in light of a post that was deleted.] In the case of NES 2.0, there is one correct header for each combination of cartridge board behavior and memory sizes, and one cartridge board for each set of PRG ROM and CHR ROM contents. Thus whether it's even possible to enf...
by tepples
Sat Feb 03, 2024 5:44 am
Forum: NESdev
Topic: is there a program that converts bmp's to 32 color attribute squares?
Replies: 6
Views: 611

Re: is there a program that converts bmp's to 32 color attribute squares?

I wrote a command-line tool in Python called savtool.py that converts a 256×240-pixel bitmap and a 32-digit palette string. It converts the image using all four subpalettes and then takes whichever produces the least error for each 16×16-pixel area. It does not handle sprite overlays.