Search found 951 matches

by qbradq
Mon Nov 25, 2013 8:13 am
Forum: Newbie Help Center
Topic: an NROM to a cart with WRAM
Replies: 27
Views: 5196

Re: an NROM to a cart with WRAM

Yogi, do you want to run this particular homebrew with SRAM support on hardware, or are you looking for an easy-to-use development platform for the NES? If the former, you can look into modifying the ROM to work with MMC1. In a nutshell, you would alter the reset routine to initialize the MMC1 and s...
by qbradq
Mon Nov 25, 2013 7:04 am
Forum: NES Hardware and Flash Equipment
Topic: NES inside Gameboy DMG Shell (ideas? Not Raspberry PI)
Replies: 21
Views: 7207

Re: NES inside Gameboy DMG Shell (ideas? Not Raspberry PI)

You could probably do it with an FPGA board, although it might need to be multi-layer to get the kind of densities you need. The big problem with FPGA's is that you need big logic density to implement an NES system, and even more if you want to interface with an SD card or similar, and as you increa...
by qbradq
Fri Nov 22, 2013 1:50 pm
Forum: NES Hardware and Flash Equipment
Topic: Punch Out Cartridge have only TTLs instead of MMC2!
Replies: 40
Views: 20427

Re: Punch Out Cartridge have only TTLs instead of MMC2!

A DDP cart that used MMC5? I thought DDP was written for MMC3. I'd still like to see a discrete version of MMC3 :D
by qbradq
Fri Nov 22, 2013 12:42 pm
Forum: 2014 NESdev Competition
Topic: RHDE
Replies: 59
Views: 71473

Re: RHDE

Wow, that looks freakin' great Tepples! The two of you are really setting a high bar for next year's competition!
by qbradq
Fri Nov 22, 2013 12:38 pm
Forum: Reproduction
Topic: MMC1,2,3,4/Sunsoft-5B reproduction circuit boards. INL-ROM
Replies: 199
Views: 68872

Re: MMC1,2,3,4/Sunsoft-5B reproduction circuit boards. INL-R

Unagi is the legacy software that supports a number of older parallel port programmers in addition to the Kazzo. Anago is a stripped-down version of Unagi that only supports Kazzo, but left out the SRAM function. The Kazzo firmware supports this, however.
by qbradq
Thu Nov 21, 2013 4:54 pm
Forum: General Stuff
Topic: NESDev Compo Poll
Replies: 33
Views: 11492

Re: NESDev Compo Poll

The only feature I was thinking of was software-select-able name table mirroring. And I'll clarify that I'm not terribly interested in using these features for the competition, I am just trying to have the conversation for clarity's sake.
by qbradq
Thu Nov 21, 2013 4:41 pm
Forum: Reproduction
Topic: MMC1,2,3,4/Sunsoft-5B reproduction circuit boards. INL-ROM
Replies: 199
Views: 68872

Re: MMC1,2,3,4/Sunsoft-5B reproduction circuit boards. INL-R

Right, so the Anago software that I ported does not have SRAM read function, and the Unagi software that does have that option is not finding the board. Not sure what's going on there, and I can't test it on Windows.
by qbradq
Thu Nov 21, 2013 1:39 pm
Forum: General Stuff
Topic: NESDev Compo Poll
Replies: 33
Views: 11492

Re: NESDev Compo Poll

Is the choice of 48KB informed by the mapper in some way? It seems oddly not round to me. Why not make it an even 64KB? That would allow many standard board configurations for the mappers that 28 supports. Also, can we clarify whether entries may be submitted that are aware of and leverage the featu...
by qbradq
Thu Nov 21, 2013 1:16 pm
Forum: NES Hardware and Flash Equipment
Topic: NROM larger than 32K?
Replies: 190
Views: 56064

Re: NROM larger than 32K?

Yogi,

This community loves to necro-bump. This thread was last posted to like two weeks ago :) Interestingly enough, this technique is coming back in the FPGA world for complex address decoding thanks to having LUTs everywhere.
by qbradq
Thu Nov 21, 2013 12:59 pm
Forum: Reproduction
Topic: MMC1,2,3,4/Sunsoft-5B reproduction circuit boards. INL-ROM
Replies: 199
Views: 68872

Re: MMC1,2,3,4/Sunsoft-5B reproduction circuit boards. INL-R

Yogi, Using the original Kazzo board with the original firmware and client software, you could read and write SRAM on unmodified NES carts. Based on those reports, and the assumption that INL's programmer is 100% backwards-compatible with the Kazzo, you should be able to buy one of his programmers a...
by qbradq
Thu Nov 21, 2013 12:52 pm
Forum: NES Hardware and Flash Equipment
Topic: Is there a debug version of Nestopia?
Replies: 9
Views: 6467

Re: Is there a debug version of Nestopia?

Woops, got my address wrong :) Yea, your init code needs to be between $E000 and $FFF9. Why don't you look at $FFF0 and see if you can put your trampoline there. A lot of games have that semi-standard header information there you could overwrite. If it really is used to the last byte with DCPM data,...
by qbradq
Wed Nov 20, 2013 9:18 am
Forum: NES Hardware and Flash Equipment
Topic: Is there a debug version of Nestopia?
Replies: 9
Views: 6467

Re: Is there a debug version of Nestopia?

You should probably try the Nintendulator debugger and single-step the code from power-on. My first guess without seeing your code is that you've got your reset vector in the next-to-last bank instead of the last bank, and the emulators that properly emulate the unknown power-on state are freaking y...
by qbradq
Wed Nov 20, 2013 9:14 am
Forum: General Stuff
Topic: NESDev Compo Poll
Replies: 33
Views: 11492

Re: NESDev Compo Poll

I really don't understand the value in splitting the field between discrete mappers and NROM. It seems to me with such a relatively small community of developers we'd want to not split things up. Can you help me understand your reasons behind this? Apart from not understanding the motivations it doe...
by qbradq
Wed Nov 20, 2013 7:21 am
Forum: General Stuff
Topic: NESDev Compo Poll
Replies: 33
Views: 11492

Re: NESDev Compo Poll

I think Tepple's suggestion is a good idea. It's basically "anything that will work on the Mapper 28 multicart" and "everything else". I think this aligns with the goals and expectations of the competition without artificially limiting projects.