Search found 3245 matches

by Zepper
Mon May 10, 2021 5:52 pm
Forum: NESemdev
Topic: Dragon Warrior 3 and 4?
Replies: 1
Views: 177

Dragon Warrior 3 and 4?

Dragon Warrior 3 gives a green screen (infinite loop), and DW4 crashes, bad opcode $32 trapped at PC $B911.
It's strange, because it has been reported before here in this topic, but in my emulator, there's no CPU bug on BRK - got a PASS in every CPU test ROM.
by Zepper
Thu May 06, 2021 2:52 pm
Forum: General Stuff
Topic: C optimizations?
Replies: 2
Views: 452

C optimizations?

This is used to upscale a bitmap image to 4x. Is possible to optimize it? //surface_00 is a (unsigned int) pointer to the bitmap. //surface_08 is a pointer to the next line of the bitmap. //surface_16 and 24 are pointers to the next lines. //value is the color (24bit format RRGGBB). *surface_00 = *s...
by Zepper
Wed May 05, 2021 5:10 am
Forum: NESemdev
Topic: RockNES 5.70C -May 5th 2021-
Replies: 5
Views: 1115

Re: RockNES 5.70B -May 3rd 2021-

(...) I just remember Richard being so rude and obtuse... Really making it a point to show how much smarter he is than a 9th grader... I don't know how anyone could ever get along with someone like that. In later years I used OTX to get rid of his shareware nag screens. (..) Well, yes. Unfortunatel...
by Zepper
Mon May 03, 2021 3:52 pm
Forum: NESemdev
Topic: RockNES 5.70C -May 5th 2021-
Replies: 5
Views: 1115

Re: RockNES 5.70B -May 3rd 2021-

Ben Boldt wrote:
Mon May 03, 2021 3:04 pm
What ever happened to the Macintosh version? Did you get fed up working with Richard Bannister or was he the one that stopped porting it for some reason? I have always been curious about that.
it's been a long time. I don't remember details. We broke up.
by Zepper
Mon May 03, 2021 11:55 am
Forum: NESemdev
Topic: RockNES 5.70C -May 5th 2021-
Replies: 5
Views: 1115

Re: RockNES 5.70B -Mayl 3rd 2021-

Bug fix version 5.70B released.
Please, send me feedback.
by Zepper
Fri Apr 30, 2021 8:01 am
Forum: NESemdev
Topic: RockNES 5.70C -May 5th 2021-
Replies: 5
Views: 1115

RockNES 5.70C -May 5th 2021-

DOWNLOAD: https://www.dropbox.com/s/q6ympgtrscwsbjv/rnes570c.zip?dl=1 What's new for version 5.70C (05/05/2021) ----------------------------------------- - Fixed sound volume level with unsigned samples. What's new for version 5.70B (05/03/2021) ----------------------------------------- - Fixed dis...
by Zepper
Thu Apr 29, 2021 2:09 pm
Forum: NESemdev
Topic: APU mixer output?
Replies: 2
Views: 818

Re: APU mixer output?

I still use Allegro, and yes, it requires unsigned samples.
Thank you.
by Zepper
Thu Apr 29, 2021 7:10 am
Forum: NESemdev
Topic: APU mixer output?
Replies: 2
Views: 818

APU mixer output?

Example: the 16-bit output of the square wave (with volume $0F) would be $0F00 (unsigned).
Now, using the formula from the wiki, what's the 16-bit output value? If both square waves produces volume $0F, the mixer returns a value of 0.25.
by Zepper
Sun Apr 18, 2021 7:45 am
Forum: NESemdev
Topic: Debugging 6502, JMP indirect mode confusion about results
Replies: 4
Views: 2273

Re: Debugging 6502, JMP indirect mode confusion about results

As I mentioned in your other thread , the version of nestest.log you retrieved from that repository is outdated and contains an error, and you literally just encountered that error - the section you quoted is supposed to begin with " DBB5 6C FF 02 JMP ($02FF) = 0300 ". So... it didn't make any sens...
by Zepper
Sat Apr 17, 2021 5:54 am
Forum: NESemdev
Topic: Open bus test results?
Replies: 5
Views: 2158

Re: Open bus test results?

Literally quoting the first link I included, "APU open bus" is the result of reading $4006 and $4007. The first two should be $40. The third [rides] the open bus from $3F06 to $4006 The result should be $40 $40 $3F. I don't get $3F but $40, since the last address was $4006 (returns high byte of the...
by Zepper
Fri Apr 16, 2021 2:07 pm
Forum: NESemdev
Topic: Open bus test results?
Replies: 5
Views: 2158

Re: Open bus test results?

OK.
I don't get the APU open bus $40 $40 $3f, but $40 $40 $40.
What is the pulse 2 read ?
by Zepper
Wed Apr 14, 2021 2:53 pm
Forum: NESemdev
Topic: Open bus test results?
Replies: 5
Views: 2158

Open bus test results?

Here's the output result of 3 emulators (latest version).
I'm targetting the joypads (Controllers 1 and 2).
Which one is correct?
joy_test.png
by Zepper
Fri Apr 09, 2021 6:11 pm
Forum: NESemdev
Topic: RockNES 5.66 -April 9th 2021-
Replies: 16
Views: 10893

Re: RockNES 5.66 -April 9th 2021-

The Vs. System is not the same hardware as the NES, and you shouldn't have $4016 and $4017 behaves the same for both. It is absolutely correct that if you put Vs. SMB on a NES cart it would perceive the coin drop as continuously activated. The best words would be... "Improve your mapper 99 emulatio...
by Zepper
Fri Apr 09, 2021 2:13 pm
Forum: NESemdev
Topic: RockNES 5.66 -April 9th 2021-
Replies: 16
Views: 10893

Re: RockNES 5.66 -April 9th 2021-

What's new for version 5.66 (04/09/2021) ... [general] - Removed value $40 ORed at every joypad read. ... I hope this means it's being handled by general Open Bus emulation (i.e. setting the upper 3 bits according to the last value that the CPU successfully read) rather than a hardcoded special cas...
by Zepper
Fri Apr 09, 2021 10:44 am
Forum: NESemdev
Topic: RockNES 5.66 -April 9th 2021-
Replies: 16
Views: 10893

Re: RockNES 5.66 -April 9th 2021-

New version today.