Search found 405 matches

by Gilbert
Thu Oct 22, 2020 2:17 am
Forum: SNESdev
Topic: [demo] SNES Sonic
Replies: 179
Views: 49614

Re: [demo] SNES Sonic

True. But there are only a couple of ways someone knowledgeable could seriously claim the Mega Drive has "blast processing". The most common is the reference to "blasting" colours into CRAM, which is what Fantom Bitmap is based on. I think that colour thing is a more recent interpretation though, c...
by Gilbert
Wed Oct 21, 2020 10:21 pm
Forum: SNESdev
Topic: [demo] SNES Sonic
Replies: 179
Views: 49614

Re: [demo] SNES Sonic

I think by mentioning Blast Processing people are just being sarcastic and are not really serious about it, as that term can mean anything (or... nothing at all other than advertising jargon), so by saying Sonic MD didn't use Blast Processing is just something like "Sonic on MD is great achievement!...
by Gilbert
Wed Oct 21, 2020 6:05 pm
Forum: SNESdev
Topic: How does Tales of Phantasia and Star Ocean scale sprites on stock hardware?
Replies: 26
Views: 1476

Re: How does Tales of Phantasia and Star Ocean scale sprites on stock hardware?

It's been like a decade, but last I remember the vram chips are static ram at 100ns. Mid-res mode is 140ns access. I wouldn't say that close to overclocking it. I never read the specs so I couldn't confirm it, but I think Elmer once mentioned it was written in the specs that the VRAM chips were 120...
by Gilbert
Tue Oct 20, 2020 6:29 pm
Forum: SNESdev
Topic: How does Tales of Phantasia and Star Ocean scale sprites on stock hardware?
Replies: 26
Views: 1476

Re: How does Tales of Phantasia and Star Ocean scale sprites on stock hardware?

There are two VDPs in the SGX. Each has its own 64k of vram. Ah, that explained it. I always wondered since it was already close to overclocking the VRAM to display 16 sprites per line(especially under mid-res) how could this limit be doubled just by adding an extra VDP (as you'll need to read twic...
by Gilbert
Mon Oct 19, 2020 11:22 pm
Forum: SNESdev
Topic: How does Tales of Phantasia and Star Ocean scale sprites on stock hardware?
Replies: 26
Views: 1476

Re: How does Tales of Phantasia and Star Ocean scale sprites on stock hardware?

Anyway, for these consoles, maybe after a few years of their release, it was not practical to enhance them by doubling the amount of video RAM anymore (even after memory price had dropped), as a couple of the already released games could break (those that relied on the mirroring of the video RAM, am...
by Gilbert
Mon Oct 19, 2020 10:46 pm
Forum: SNESdev
Topic: How does Tales of Phantasia and Star Ocean scale sprites on stock hardware?
Replies: 26
Views: 1476

Re: How does Tales of Phantasia and Star Ocean scale sprites on stock hardware?

Yeah, AFAIK the SFC/SNES only has 64kb of video RAM, so it's not much better than the PCE or the MD in this department. I think the misunderstanding came from the fact that the SFC hardware could support 128kb ( I'm not sure, correct me if I was wrong yes, see edit below*) but somehow it never came ...
by Gilbert
Sun Oct 04, 2020 10:25 pm
Forum: SNESdev
Topic: Image to SNES conversion
Replies: 4
Views: 747

Re: Image to SNES conversion

Png seems to offer TOO MUCH detail where it is not called for. But there is no such thing as this. Unless there are other change in settings (different resolutions, colour depths, etc.) PNG images should be identical to the original. If you see anti-alias in a PNG image it could be just because the...
by Gilbert
Tue Sep 29, 2020 10:43 pm
Forum: NESdev
Topic: Should I hack more nes games besides mario?????
Replies: 10
Views: 1616

Re: Should I hack more nes games besides mario?????

Note that however simple they seem to be, Mario 1 - 3 are NOT simple games (assuming you meant the Super Mario Games, not the original Mario Bros), so unless you have some past experience or are just doing minor changes such as swapping the graphics, these games are not recommended for beginners. Si...
by Gilbert
Wed Sep 23, 2020 10:19 pm
Forum: General Stuff
Topic: Help to identify unknown game gun
Replies: 11
Views: 1767

Re: Help to identify unknown game gun

But I was not talking about the "common" PC game ports. I was talking about custom ports on those graphics accelerators (though admittedly I'm not familiar with what actual ports these things used), though some of these cards may just support genuine Saturn gamepads, etc. Edit: I was talking about c...
by Gilbert
Wed Sep 23, 2020 6:36 pm
Forum: General Stuff
Topic: Help to identify unknown game gun
Replies: 11
Views: 1767

Re: Help to identify unknown game gun

It could also be for PC computers.
Around mid to late 90s, there were graphic accelerators specifically for games with may include their own jacks for controllers.
In particular, there were cards that ran Virtua Fighter, maybe Virtua Cop too, so this gun could be for one of those cards.
by Gilbert
Tue Sep 22, 2020 10:28 pm
Forum: NESdev
Topic: 8-Way Scrolling Screen Compression Method?
Replies: 19
Views: 2834

Re: 8-Way Scrolling Screen Compression Method?

Personally, i decided against using compression. But (depending on your definition) using metatiles is already a form of compression. The basic concept of a lot of (if not most) compression schemes is to reuse the same structure as much as possible. Also, depending on the data, even RLE can be an e...
by Gilbert
Tue Sep 22, 2020 6:50 pm
Forum: NES Hardware and Flash Equipment
Topic: Twin Famicom - Only discs shows messed up graphics
Replies: 7
Views: 1046

Re: Twin Famicom - Only discs shows messed up graphics

This is odd if colours work for cart games and not FDS ones though. One difference between carts and FDS I can think of is that the FDS uses CHR RAM while carts (usually) use CHR ROM. Maybe there are some defects(connection problems maybe?) in the FDS CHR RAM that somehow only certain bitplanes of t...
by Gilbert
Thu Sep 17, 2020 7:13 pm
Forum: General Stuff
Topic: Sharp Nintendo Television
Replies: 3
Views: 1219

Re: Sharp Nintendo Television

Sharp was in a very good relationship with Nintendo (I've heard they manufactured a lot of the lcd panels for Nintendo handheld systems, possibly including Game & Watch and the Gameboys, not sure about the modern ones) so there were number of Nintendo console "spin-offs" sold by Sharp. Besides the S...
by Gilbert
Mon Sep 14, 2020 10:36 pm
Forum: NESdev
Topic: Sprites will not show up
Replies: 12
Views: 1833

Re: Sprites will not show up

Are you sure the NMI codes are executed?
(Are there codes other than sprite DMA they you have confirmed to work there?)
Maybe there is a typo with labels, or whatever, such that during NMI it runs codes from somewhere else, just a suggestion.
by Gilbert
Sun Sep 06, 2020 9:15 pm
Forum: NESdev
Topic: Questions about NES programming and architecture
Replies: 143
Views: 20486

Re: Questions about NES programming and architecture

This was what I thought too. Also, they might have considered upgrading the CPU to be based on 65C02, so most licensed games didn't use any illegal/nonstandard/unofficial/whatever OP codes of the original 6502 (another possibility was just that these unofficial OP codes were... errr... poorly docume...