Search found 1298 matches

by NewRisingSun
Sat May 08, 2021 6:50 am
Forum: NESemdev
Topic: Mapper 176 sub mapper # 2
Replies: 8
Views: 594

Re: Mapper 176 sub mapper # 2

When designing circuit boards with 8 KiB of CHR-RAM, the CHR-RAM's CHR A10-A12 can be connected straight to PPU A10-12 which means that MMC3 registers 0-5 are ignored ("unbanked 8 KiB CHR-RAM"), or CHR-RAM A10-A12 can be connnected to MMC3 CHR A10-A12 ("banked 8 KiB CHR-RAM"). Those writes set up MM...
by NewRisingSun
Sat May 08, 2021 1:18 am
Forum: NESemdev
Topic: Mapper 176 sub mapper # 2
Replies: 8
Views: 594

Re: Mapper 176 sub mapper # 2

The dumps of Shuang Yue Zhuan (双月传: 095D8678 and "Shen Feng Jian" 神风剑 D5F7AAEF) are nothing like that; they need 32 KiB PRG-RAM and 8 KiB CHR-RAM, although typically a 32 KiB CHR-RAM is mounted. Since they are the Chinese translation of the original Japanese game "Double Moon Densetsu", which is TNR...
by NewRisingSun
Wed May 05, 2021 4:14 am
Forum: NESemdev
Topic: Mapper 176 sub mapper # 2
Replies: 8
Views: 594

Re: Mapper 176 sub mapper # 2

In that case, yes, if $A001.5 is set, it can be assumed to be submapper 2 (Waixing FS00x). However, I have done more hardware tests, and found that the current submapper and other aspects of the specification are insufficient. You might want to delay finalizing your hardware implementation for a wee...
by NewRisingSun
Tue May 04, 2021 10:43 pm
Forum: NESemdev
Topic: Mapper 176 sub mapper # 2
Replies: 8
Views: 594

Re: Mapper 176 sub mapper # 2

but the PRG bank register swapping of # $46 and # $47 is different from other features and cannot be compatible with each other. This exclusivity requires the assignment of a mapper number. I don't understand --- the submapper was assigned because the variants are not fully compatible to each other...
by NewRisingSun
Tue May 04, 2021 10:19 am
Forum: NESdev
Topic: FDS header date fields
Replies: 36
Views: 13319

Re: FDS header date fields

What additional low-level functionality does this provide beyond what FDSStick offers in raw mode?
by NewRisingSun
Thu Apr 22, 2021 8:10 am
Forum: NES Hardware and Flash Equipment
Topic: EverDrive-N8 Bank Switching issue
Replies: 19
Views: 2742

Re: EverDrive-N8 Bank Switching issue

This is not supposed to happen. Many commercial UNROM games depend on the correct bank being loaded as well. Do you find games like Castlevania crashing after some time on your Everdrive N8? If so, then your Everdrive may just be faulty. Otherwise, check if your code writes to CPU $8000-$FFFF withou...
by NewRisingSun
Wed Apr 21, 2021 5:39 am
Forum: NESemdev
Topic: Gradius II Wii Virtual Console rom doesn't run in any NES emulator (I've tried).
Replies: 6
Views: 2050

Re: Gradius II Wii Virtual Console rom doesn't run in any NES emulator (I've tried).

"The mapper 9 with Vs. System designation" comes from byte 7 having the value $01 instead of the correct $10. Mapper 25 ($19) therefore becomes 9 ($09). Either the header was filled erroneously and the Virtual Console emulator does not care because it uses hard-coded settings, or the emulator itself...
by NewRisingSun
Thu Apr 15, 2021 4:40 am
Forum: NES Hardware and Flash Equipment
Topic: Battle Box - another save-state utility
Replies: 5
Views: 1426

Re: Battle Box - another save-state utility

Okay, so the difference to a conventional setup is that instead of writing the desired DAT value into a register then pulling the clock high, I read a register once or twice until it has the DAT value (or its opposite) I want and then pull the clock high?
by NewRisingSun
Thu Apr 15, 2021 4:10 am
Forum: NES Hardware and Flash Equipment
Topic: Battle Box - another save-state utility
Replies: 5
Views: 1426

Re: Battle Box - another save-state utility

I am afraid I understand nothing, neither this description, nor what is on the wiki . How can a read cause both an input and an output? Edit: A normal microwire serial EEPROM with two chips that I can understand works like this: I have a CLK bit that I write 0 or 1 to, I have two Chip Select bits, o...
by NewRisingSun
Sat Apr 10, 2021 1:03 am
Forum: NES Music
Topic: More NSF Requests
Replies: 3104
Views: 1343263

Re: More NSF Requests

Now complete with all songs and sound effects and the FDS sound channel.
Aspic Majaou no Noroi.nsf
(16.9 KiB) Downloaded 100 times
by NewRisingSun
Mon Apr 05, 2021 2:29 am
Forum: NES Hardware and Flash Equipment
Topic: Mapper227's multi-menu display
Replies: 12
Views: 6032

Re: Mapper227's multi-menu display

The wiki article says "Bit 11 of the address written activates the menu list selection.", but the bitfield shows the "m" bit, described as "Menu list (see below)", as bit 10 rather than 11.

With no public dump of a multi-menu mapper 227 cart available, none of this information can be verified.
by NewRisingSun
Sat Apr 03, 2021 12:03 am
Forum: NES Hardware and Flash Equipment
Topic: Mapper227's multi-menu display
Replies: 12
Views: 6032

Re: Mapper227's multi-menu display

Which Nanjing game use mapper 227? Mei Guo Fu Hao (Waixing) (Ch) [a1].nes That's not a Nanjing game though. It's a Henggedianzi version of a Waixing game. When used for single-game cartridges, it was mostly used by Waixing --- as mapper 242 for 512 KiB games, and mapper 227 for 1 MiB games. There i...
by NewRisingSun
Fri Apr 02, 2021 9:52 am
Forum: NES Hardware and Flash Equipment
Topic: Mapper227's multi-menu display
Replies: 12
Views: 6032

Re: Mapper227's multi-menu display

Which Nanjing games use mapper 227?
by NewRisingSun
Sat Mar 20, 2021 11:52 am
Forum: NESdev
Topic: FDS header date fields
Replies: 36
Views: 13319

Re: FDS header date fields

You mean the speed measuring is done on the Game Doctor itself?
No, but the program in general uses disk I/O routines from the Game Doctor BIOS, and uses the Game Doctor's additional memory to store the program code along with the full content of an entire disk.
by NewRisingSun
Thu Mar 04, 2021 2:36 pm
Forum: NES Graphics
Topic: Do colored borders bother you?
Replies: 17
Views: 3432

Re: Do colored borders bother you?

I like colored borders if the borders effectively make them a visual continuation of the graphics next to the border. In the SMB2 example, if the border were red, I would actually prefer the red to the black border. Borders in an entirely different color, as in the actual SMB2 title screen, are ugly...