Search found 18 matches

by mr-volk
Mon Jan 02, 2017 2:19 am
Forum: Reproduction
Topic: ETROM / 256k SRAM problems. Need advice
Replies: 18
Views: 10196

Re: ETROM / 256k SRAM problems. Need advice

Freezes between save selects becouse SRAM filled with FF (when it empty). I solder battery to sram, write 00 (and also sav file from emulator) - no freezes between selects. But when i power off and power on famicom - game dont boot. I read sram to save file. Save file in attach.
by mr-volk
Mon Nov 21, 2016 3:45 am
Forum: Reproduction
Topic: ETROM / 256k SRAM problems. Need advice
Replies: 18
Views: 10196

Re: ETROM / 256k SRAM problems. Need advice

I also made repro with 32KB and it have same problems with save-freezes.
Does anybody resolve it with real HW?
by mr-volk
Thu Jul 14, 2016 12:32 pm
Forum: General Stuff
Topic: NES Cart DB down again
Replies: 83
Views: 42749

Re: NES Cart DB down again

I can organize a mirror at my home server.
Do you need it?
by mr-volk
Mon Jul 27, 2015 2:01 pm
Forum: NES Hardware and Flash Equipment
Topic: Perfect FDS 2C33 audio when not using actual FDS disks?
Replies: 259
Views: 97698

Re: Perfect FDS 2C33 audio when not using actual FDS disks?

thx loopy.
just recieved ram adapter and test fdsstick.
all working fine.
Video test (Russian) https://youtu.be/6Zig-WYx9oI
by mr-volk
Wed Oct 15, 2014 12:30 am
Forum: Reproduction
Topic: [SOLVED] VRC2 to VRC4 conversion
Replies: 7
Views: 4611

Re: VRC2 to VRC4 conversion

thx to all.
problem solved by mixing vrc4 game and vrc2 game in one cart. vrc4 initialize vrc4 chip normaly and after reset vrc2 game working normaly.
this my repro:
Image
http://youtu.be/C4U6Q35A5sA
by mr-volk
Sat Oct 11, 2014 11:39 pm
Forum: Reproduction
Topic: [SOLVED] VRC2 to VRC4 conversion
Replies: 7
Views: 4611

Re: VRC2 to VRC4 conversion

seem's its prg mode or irq control of vrc4.
by mr-volk
Sat Oct 11, 2014 2:08 am
Forum: Reproduction
Topic: [SOLVED] VRC2 to VRC4 conversion
Replies: 7
Views: 4611

[SOLVED] VRC2 to VRC4 conversion

Hi, need some help. Im trying to run wai wai world 1 (mapper 023 vrc2b) with vrc4c pcb (mapper 21, Ganbare Goemon Gaiden 2 as a donor). VRC2b: A0, A1 $x000, $x001, $x002, $x003 023 VRC4c: A6, A7 $x000, $x040, $x080, $x0C0 021 I change mapper and swap STA opcodes. Emulators runs game normaly. But wit...
by mr-volk
Thu Sep 18, 2014 12:18 pm
Forum: NES Hardware and Flash Equipment
Topic: MMC3 on CPLD
Replies: 45
Views: 24419

Re: MMC3 on CPLD

Yes, I want to upload my verilog implementation to wiki, but I didn't make it because Ruslansh just take my sources and make a lot of carts for sale. Yes, I split implementation on 2 chips, because all CHR registers needs 64 macrocells and other 8 macro need for logic CHR banking. Ruslansh - pirate...
by mr-volk
Sat Aug 09, 2014 12:09 pm
Forum: Reproduction
Topic: [SOLVED] UNROM to UxROM 512 - gray screen
Replies: 11
Views: 18166

Re: UNROM to UxROM 512 - gray screen

ground 7 and 10 pins
all other is right
by mr-volk
Thu Jul 17, 2014 12:32 am
Forum: Reproduction
Topic: [SOLVED] UNROM to UxROM 512 - gray screen
Replies: 11
Views: 18166

Re: UNROM to UxROM 512 - gray screen

Seems solution
ground 7 and 10 pins. Thx for nikita600.
Try later.
by mr-volk
Wed Jul 16, 2014 10:43 pm
Forum: Reproduction
Topic: [SOLVED] UNROM to UxROM 512 - gray screen
Replies: 11
Views: 18166

[SOLVED] UNROM to UxROM 512 - gray screen

Trying to do uxrom 512 with 161 and 32 chips. But still - gray screen.
Is where error with schematic?

Image
Image
Image
by mr-volk
Tue May 13, 2014 6:23 am
Forum: NESdev
Topic: [Solved] Forbidden Four and Alter Ego
Replies: 2
Views: 1657

Re: Forbidden Four and Alter Ego

tepples wrote:There's a known bug in early games using Shiru's library. It can be fixed.
Big THX!
Just replaced A0 40 to A0 F0 in hex editor. Now all works good)
by mr-volk
Tue May 13, 2014 3:57 am
Forum: NESdev
Topic: [Solved] Forbidden Four and Alter Ego
Replies: 2
Views: 1657

[Solved] Forbidden Four and Alter Ego

Hi,
I try to build 4-game rom with "The Forbidden Four" - multicart engine based on The Legend of Zelda.
All NROM-256 games work fine. But Alter Ego without graphics. Seem to where is no CHR data in CHR Ram.
Can anyone help a little?
by mr-volk
Mon Jan 27, 2014 10:16 pm
Forum: Reproduction
Topic: [Solved] Help with TKROM -> TSROM conversion
Replies: 5
Views: 6575

Re: [Solved] Help with TKROM -> TSROM conversion

Senks, my mistake. I did not pay attention to this. Accidentally vertically flipped.
by mr-volk
Mon Jan 27, 2014 12:23 pm
Forum: Reproduction
Topic: [Solved] Help with TKROM -> TSROM conversion
Replies: 5
Views: 6575

Re: Help with TKROM -> TSROM conversion

Solved. Problem - mmc3 chip version. Seems IRQ counter problem.
First pic was with mmc3b "S" chip.
With mmc3a game working normal.
Image
At the end:
Image