Search found 137 matches

by olddb
Sat Jan 16, 2021 5:19 pm
Forum: SNESdev
Topic: Why don't we have a SNES Game Jam?
Replies: 15
Views: 670

Re: Why don't we have a SNES Game Jam?

So far we got:
drludos
Nikku4211
olddb

Let's get more participants and make this happen.
I still think we should limit the room space, so the end product fits under 4MB.

Anyone else wants to sign up?
by olddb
Sat Jan 16, 2021 12:12 pm
Forum: SNESdev
Topic: Using high bank lines as address decoder?
Replies: 6
Views: 287

Re: Using high bank lines as address decoder?

Thanks for the replies.
by olddb
Thu Jan 14, 2021 9:56 pm
Forum: SNESdev
Topic: Using high bank lines as address decoder?
Replies: 6
Views: 287

Re: Using high bank lines as address decoder?

For your example of using BA6=A22, you can't only use the copy of RAM that you've mapped in the region where A23 is high: it'll still conflict with SNES-internal RAM because A23 isn't being used at all. Sorry, can you be more specific. As I understand, internal RAM is at banks $7e and $7f, but not ...
by olddb
Tue Jan 12, 2021 6:05 pm
Forum: SNESdev
Topic: Why don't we have a SNES Game Jam?
Replies: 15
Views: 670

Re: Why don't we have a SNES Game Jam?

Your right. I was assuming Mode1. I think Olddb meant nametable data (SC data), not the actual pattern data. Each SC entry is 16-bit in most (all? I forgot) modes, and this could affect level map data in ROM I guess. This is what I meant. A different thing we could do is instead of multiple mini ga...
by olddb
Tue Jan 12, 2021 3:54 pm
Forum: SNESdev
Topic: Why don't we have a SNES Game Jam?
Replies: 15
Views: 670

Re: Why don't we have a SNES Game Jam?

HiROM and LoROM can both do 4MB. We will have to decide which to use, though. Keep in mind SNES games tile data is 16bits and there are 3 possible planes to fill. Also, graphics take more rom space, etc. I was thinking more along the lines of 16 or 8 games in a cartridge. I don't think we will get t...
by olddb
Tue Jan 12, 2021 12:08 pm
Forum: SNESdev
Topic: Why don't we have a SNES Game Jam?
Replies: 15
Views: 670

Re: Why don't we have a SNES Game Jam?

We could do something like the nes dev comp but for the SNES.
Make a collection of mini-games.
Each entry could have a size restriction, let's say 256k or 512k.
by olddb
Tue Jan 12, 2021 12:02 pm
Forum: SNESdev
Topic: Using high bank lines as address decoder?
Replies: 6
Views: 287

Using high bank lines as address decoder?

Let's say a 512k lorom rom game, could the high bank lines be used as an address decoder for cart RAM? BA6 -> CS2 on 6264 /BA6 -> /CS on ROM So cart RAM will reside at $40:8000 and mirrors. I see this will have bus conflicts with internal wram, but how about at $c0:8000? Does the address lines need ...
by olddb
Mon Dec 21, 2020 9:47 pm
Forum: NES Hardware and Flash Equipment
Topic: Paprium cartridge PCB and hardware
Replies: 5
Views: 1010

Re: Paprium cartridge PCB and hardware

ALTERA 10m02scu169c8g FPGA
STM32f446zej6 Microcontroller
ISSI IC42S16100 DRAM
LCX245 Buffers
LCX257 Multiplexers
by olddb
Sun Dec 20, 2020 4:58 pm
Forum: NES Hardware and Flash Equipment
Topic: Paprium cartridge PCB and hardware
Replies: 5
Views: 1010

Paprium cartridge PCB and hardware

As you may know, the Mega Drive game Paprium was finally released.
https://www.youtube.com/watch?v=stWXSdD ... e=emb_logo

Here's a look at the PCB. I'm curious what nesdev has to say about it.
1608223436325.jpg
1608301309633.jpg

Edit: Can a mod fix the title?
Title fixed - MOD
by olddb
Tue Dec 08, 2020 10:35 am
Forum: Homebrew Projects
Topic: Kosmity Atakujo
Replies: 27
Views: 10090

Re: Kosmity Atakujo

sdm2 wrote:
Mon Dec 07, 2020 9:25 am
I test everything on real hardware and I've never had such bugs.
This is odd.

BTW: Are you Japanese?
by olddb
Mon Nov 30, 2020 9:00 pm
Forum: NES Graphics
Topic: Unreleased NES games from Alp (Gallery NES hack)
Replies: 18
Views: 3634

Re: Unreleased NES games from Alp (Gallery NES hack)

That art is sweet though.
I would love for him to team up with a programmer and release something.
Dude got talent.
by olddb
Sun Nov 22, 2020 2:43 pm
Forum: Newbie Help Center
Topic: MMC3 bankswitching - need to switch back to 0x8000 after the bankswitch.
Replies: 9
Views: 2572

Re: MMC3 bankswitching - need to switch back to 0x8000 after the bankswitch.

Haven't tested this, but try: .inesprg 2 ; 2x 16KB PRG code .ineschr 0 ; 0x 8KB CHR data .inesmap 4 ; mapper 0 = NROM, no bank swapping .inesmir 0 ; background mirroring ;;;;;;;;;;;;;;; .bank 0 .org $8000 start0: Forever: JMP Forever ;jump back to Forever, infinite loop ;;;;;;;;;;;;;; .bank 1 .org $...
by olddb
Sat Nov 21, 2020 11:19 pm
Forum: Newbie Help Center
Topic: MMC3 bankswitching - need to switch back to 0x8000 after the bankswitch.
Replies: 9
Views: 2572

Re: MMC3 bankswitching - need to switch back to 0x8000 after the bankswitch.

You need your bank switching code somewhere in the $c000 fixed bank. Once the bank is switched you can jump to the 8000-$9FFF area. Also, does MMC3 guarantee bank0 at $8000 on startup? EDIT: Maybe this will help. LDA #%00000110 STA $8000 LDA #$01 STA $8001 ;you are no longer on this bank, "JMP f1" c...