Search found 3727 matches

by Memblers
Thu Dec 05, 2019 4:23 pm
Forum: Newbie Help Center
Topic: UNROM and NESASM
Replies: 3
Views: 130

Re: UNROM and NESASM

I don't see anything wrong there. How about where you write to the mapper register? UNROM has bus conflicts, so normally mapper writes would be done like this:

Code: Select all

banktable: .byte 0,1,2,3,4,5,6,7
bankswitch: ; bank # loaded in A
	tax
	sta banktable,x
	rts
by Memblers
Wed Dec 04, 2019 9:27 pm
Forum: NES Hardware and Flash Equipment
Topic: Bricked Two of my Attiny13a's
Replies: 4
Views: 164

Re: Bricked Two of my Attiny13a's

Yeah, it's the clock going away. Kinda dumb, I don't think this kind of thing is a problem with PICs (they get clocked by the programmer). Adding an oscillator like Hojo_Norem said will fix it, and that's exactly what I did. I program it through the cart edge, but not all the signals fit. I believe ...
by Memblers
Tue Dec 03, 2019 9:07 pm
Forum: NES Hardware and Flash Equipment
Topic: Encrypted NES roms?
Replies: 31
Views: 1000

Re: Encrypted NES roms?

A couple other tips, from a quick search. There is a fairly active Facebook group here: https://www.facebook.com/groups/1988269977898284/ maybe there is some info on the model you have. There's also the "nuke it from orbit" approach, I saw that some ported RetroArch to it, but it probably won't work...
by Memblers
Tue Dec 03, 2019 2:35 pm
Forum: NESdev
Topic: Simultaneous DPCM and IRQ
Replies: 11
Views: 251

Re: Simultaneous DPCM and IRQ

What's the size of your DPCM sample(s)? There is always some static code, pretty much has to be for NMI/reset vectors at the very least. I would just bump it up against those, put it at $F800 or whatever is the highest start address it fits in. If you must swap out that bank, it's not a crime to sim...
by Memblers
Sun Dec 01, 2019 4:17 am
Forum: NES Hardware and Flash Equipment
Topic: Hack A Day , Bringing The NES To The Age Of USB
Replies: 4
Views: 267

Re: Hack A Day , Bringing The NES To The Age Of USB

If I had heard about it, I would have been tempted to order one just for the cool factor of Brad Taylor being involved. That's a lot of tech on there for NROM, but it sounds like simplicity wasn't originally part of the plan. Yeah, GTROM was originally supposed to be for a low-end USB dev cart, that...
by Memblers
Sat Nov 30, 2019 11:08 pm
Forum: NES Hardware and Flash Equipment
Topic: Encrypted NES roms?
Replies: 31
Views: 1000

Re: Encrypted NES roms?

I looked at the supposed Pandora website (in Canada) and they insist that you're only buying the hardware and must add your own ROMs. They want to have it both ways, what a crock. Would it be worthwhile to approach the maintainer of the website asking how the publisher of an NES game can add a ROM?...
by Memblers
Sat Nov 30, 2019 3:05 pm
Forum: NES Hardware and Flash Equipment
Topic: Encrypted NES roms?
Replies: 31
Views: 1000

Re: Encrypted NES roms?

I looked at the supposed Pandora website (in Canada) and they insist that you're only buying the hardware and must add your own ROMs. They want to have it both ways, what a crock. :roll: Of course the thing is on AliExpress too for a fraction of their listed price, and almost surely it comes with th...
by Memblers
Tue Nov 26, 2019 7:34 pm
Forum: General Stuff
Topic: NESMaker reviews?
Replies: 50
Views: 10203

Re: NESMaker reviews?

I had not used NESMaker enough to write a fair review of it (and only the initial release version), maybe 3 hours at most, but almost all that time was me looking at the assembly source. I was surprised it didn't come with an example program, and with the documentation being videos, it seemed like i...
by Memblers
Sat Nov 23, 2019 12:22 am
Forum: NESdev
Topic: Works fine in the emulator, but on hardware it glitches.
Replies: 4
Views: 1311

Re: Works fine in the emulator, but on hardware it glitches.

Haha, I've done the exact same thing. Had one cart where the screen would get corrupt, thought I looked over the entire board, and put it away. I picked up a long time later and immediately noticed I never soldered the mirroring jumpers. :roll:
by Memblers
Tue Nov 19, 2019 5:43 pm
Forum: phpBB Issues
Topic: What is too politically toxic?
Replies: 52
Views: 1968

Re: What is too politically toxic?

I think with the pronoun discussion the only aspect of it that worries me, is that I don't want anyone to feel pressured to out themselves as a minority. I wish I could say "it can't happen here", but at some point there's certain to be an extra level of crap that comes along with it. It is unfortun...
by Memblers
Thu Nov 14, 2019 12:17 am
Forum: NES Hardware and Flash Equipment
Topic: Graphics issue on an NROM board. My first Reproduction.
Replies: 29
Views: 5141

Re: Graphics issue on an NROM board. My first Reproduction.

NROM (mapper 0): No modifications necessary The modification is a repair in this case, because it sounds like the plating came out of the hole for that pin. I don't have an NROM board handy, but I thought Nintendo usually connected 5V to even the NC pins (maybe I'm remembering wrong though). An unc...
by Memblers
Tue Nov 12, 2019 9:36 am
Forum: NESemdev
Topic: Can anyone help me figure out what game this is?
Replies: 8
Views: 1843

Re: Can anyone help me figure out what game this is?

zeroone wrote:What is the point of this type of spam? Is this some way to acquire user names or something?
They make the post, then come pack 2~10 days later and edit spam links into it.
by Memblers
Mon Nov 11, 2019 8:31 pm
Forum: NESemdev
Topic: Can anyone help me figure out what game this is?
Replies: 8
Views: 1843

Re: Can anyone help me figure out what game this is?

Yeah that same IP address just hit us with like 3 different accounts doing this crap. Ugh. While we're all gathered here, I'm gonna say that A Boy and his Blob is a kick-ass game though. My son liked it too, so I bought the Wii remake/redone sequel of it but neither of us got into it as much as the ...
by Memblers
Sun Nov 10, 2019 6:23 pm
Forum: Homebrew Projects
Topic: Someone for finish Universal PPU project (FPGA for real NES)
Replies: 18
Views: 14637

Re: Someone for finish Universal PPU project (FPGA for real

tepples wrote:Or are free or freeware Verilog simulators fast and accurate enough that one can usefully rely on simulation?
Verilator seems pretty darn good. https://8bitworkshop.com/ is a quick and easy way to try it out. On the platforms, select Hardware / Verilog. Includes audio and video output.
by Memblers
Sun Nov 10, 2019 5:47 am
Forum: NESdev
Topic: Works fine in the emulator, but on hardware it glitches.
Replies: 4
Views: 1311

Re: Works fine in the emulator, but on hardware it glitches.

- I've burned a ROM of Soccer downloaded from the Internet and used that on the donor Soccer PCB and this _also_ glitches. Yeah, that's not a good sign then. I've used an older Willem EPROM programmer (V3.5 I think?) in the past without any issues. The only catch was I had to set a jumper to set VC...