Search found 355 matches

by hap
Tue Feb 12, 2008 6:16 am
Forum: NESemdev
Topic: Grades of accuracy
Replies: 11
Views: 11333

Hmm, try to categorize: 1) novelty emulator made in mIRC script, outputs graphics on a channel with multiple users to prevent flooding, still very slow 2) emulator that uses several hardware components for some chips (like HardSID support in VICE) 3) emulator designed to reproduce hardware bug-for-b...
by hap
Mon Feb 11, 2008 1:29 pm
Forum: General Stuff
Topic: Anyone owns the NES game Ys III?
Replies: 0
Views: 2130

Anyone owns the NES game Ys III?

Could you try it and pay attention to the statusbar to see if it occasionally shakes? (1 pixel downward and up again). If it does, you'd make an emu-author/perfectionist happy :P
by hap
Sun Feb 10, 2008 5:25 am
Forum: NESemdev
Topic: SMB status bar Flicker
Replies: 1
Views: 2403

Welcome.
yes, I've seen it happen on my NES.
by hap
Wed Feb 06, 2008 9:19 am
Forum: NESemdev
Topic: NMI & IRQ
Replies: 27
Views: 11899

Thanks for the test roms blargg.
(small typo by Disch 3 posts above me, nmi_during_brk 1st line "27 30 00" should of course be "27 36 00")
by hap
Wed Jan 30, 2008 3:06 pm
Forum: NESemdev
Topic: New CPU test ROM
Replies: 34
Views: 48568

I like it, I got errors with cpu.nes on AB ATX, 9C SYA, 9E SXA. I was able to fix ATX by ORing A with $FF, according to documents it's ORed with $EE, $EF, $FE, or $FF depending on CPU internal state like the program counter. Maybe on the NES it's always ORed with $FF, at least it makes your test pro...
by hap
Sat Oct 06, 2007 6:59 am
Forum: NES Hardware and Flash Equipment
Topic: Questions regarding the Yobo FC
Replies: 75
Views: 22933

also, whats the deal with the Paperboy glitch where the game boots fine but the controller won't work?
Paperboy expects bit 6 to be set when reading the controller state, this is due to open-bus behaviour, effectively ORing the value with $40.
by hap
Sat Oct 06, 2007 6:50 am
Forum: NESemdev
Topic: Working out the kinks, where to go first.
Replies: 4
Views: 3453

no
by hap
Sun Sep 23, 2007 2:42 am
Forum: NESemdev
Topic: What is WRONG with my PPU???
Replies: 33
Views: 14443

NerveGas wrote:nope something else is hosey.
Does Gauntlet (1) work then? If it doesn't, you've probably got a bug in your 4-screen-mirroring handling.
mmc3 doesn't serve out of video ram right? that's just map 119?
some games, like Megaman 4.
by hap
Sun Sep 23, 2007 2:28 am
Forum: NESemdev
Topic: Why do some mapper IRQs mess up in Nestopia?
Replies: 9
Views: 4562

MMC3 IRQs should still work after a reset, so it's probably just an emulator bug, you can notify the author on the Nestopia forum.
by hap
Mon Sep 10, 2007 5:17 am
Forum: NESemdev
Topic: Advice
Replies: 8
Views: 3123

Welcome Vegenad. Programming a NES emulator in Java can be done, your deadline is fine, and your general knowledge (even if it's not much) of hardware is a plus. Not knowing how the NES works on a low level doesn't matter, that's where you'll start: researching and lots of reading. What I was wonder...
by hap
Mon Aug 06, 2007 11:45 am
Forum: General Stuff
Topic: High Hopes by Aspeckt (NES demo)
Replies: 7
Views: 4060

Nice demo :) I like the synthetic voice.

It's a pity though that knowing the NES inside out takes away most of the impressiveness for us.
*edit* peppers: run it on PAL mode.
by hap
Mon Jun 04, 2007 12:59 am
Forum: NESemdev
Topic: NTSC emulation test?
Replies: 60
Views: 55885

Maybe Nestopia calculates the aspect ratio based on NTSC_OUT_WIDTH from blargg's NTSC library, which width is about 3% too wide in favour of optimisations. (it's what Sega Li does, with a bit too wide square as result) *edit* Anyway, nice test tepples, and I agree with: Nestopia is probably within t...
by hap
Sun Jun 03, 2007 8:55 am
Forum: General Stuff
Topic: Allegro timer bug?
Replies: 8
Views: 3781

Maybe its timer runs at cycles of 1ms?
What does BPS_TO_TIMER(x) do?
by hap
Sat Jun 02, 2007 10:03 am
Forum: NESemdev
Topic: NTSC emulation test?
Replies: 60
Views: 55885

Can you make an image that is visible with RGB, invisible with NTSC?
To output "failed" if that test is ran with RGB? If it's not possible, it could just output "tv test failed", and add a "not" for NTSC.
by hap
Mon May 28, 2007 7:49 am
Forum: NES Hardware and Flash Equipment
Topic: Namco 106 questions
Replies: 1
Views: 2065

2) I have a number of these carts that have batteries but don't appear to have any WRAM at all!? Is it possible they are saving game data to this internal VRAM instead of using it for video purposes? FWIW, I know that at least 1 game (Kaijuu Monogatari) uses the on-chip sound (wavetable) RAM for it...