Search found 41 matches

by pakosup
Sat Sep 19, 2020 6:50 am
Forum: NES Hardware and Flash Equipment
Topic: SP-80 Nes-On-Chip based famiclone
Replies: 5
Views: 4661

Re: SP-80 Nes-On-Chip based famiclone

I'm pretty sure that it has the same pinout.
I've checked several pins an they are match.
by pakosup
Sat Sep 19, 2020 6:31 am
Forum: NES Hardware and Flash Equipment
Topic: Dahua Sanguo (Yancheng YC-03-09 PCB, mapper 558)
Replies: 11
Views: 2993

Re: Dahua Sanguo (Yancheng YC-03-09 PCB, mapper 558)

I've never seen these games. Actually nj-1b and nj-1c for Final Fantasy VII. I made Diablo II from one of them.
Nj-1 for Pokemon Yellow.
by pakosup
Fri Sep 18, 2020 10:55 pm
Forum: NES Hardware and Flash Equipment
Topic: Dahua Sanguo (Yancheng YC-03-09 PCB, mapper 558)
Replies: 11
Views: 2993

Re: Dahua Sanguo (Yancheng YC-03-09 PCB, mapper 558)

When I tried to make Pokemon Yellow from FF VII board then it has freezed when screen is scrolled outside a home. So I have to bought original Pokemon Yellow cart.
By the way, I have several design of pcb with mapper 163.
NJ-1, NJ-1B, NJ-1C
20180421_143142~01.jpg
by pakosup
Fri Sep 18, 2020 1:21 pm
Forum: NES Hardware and Flash Equipment
Topic: 1818P based Famiclone - fix jailbars/distorted PCM?
Replies: 4
Views: 1464

Re: 1818P based Famiclone - fix jailbars/distorted PCM?

Clone on 1818p is quite common in Russia because first models of "Dendy" have this chip. You wont rid off jailbars completely, even if you build external video amplifier. You can try this scheme to fix sound: uGuFedOhVEg.jpg * Remove components marked with grey. "мкф" is uF https://youtu.be/VUQ7KATQ...
by pakosup
Fri Sep 18, 2020 12:23 pm
Forum: NES Hardware and Flash Equipment
Topic: Famicom 15 pin joypad - how it is wired?
Replies: 3
Views: 2192

Re: Famicom 15 pin joypad - how it is wired?

I thought that scheme for 3th and 4th controller is popular https://forums.nesdev.com/viewtopic.php?t=18066#p229366 In all japanese games where only 1 or 2 players available 3th and 4th will work like 1st and 2nd. More interesting how japanese 4-player adapter works. It uses a way from NES four scor...
by pakosup
Tue Aug 11, 2020 6:00 am
Forum: NES Hardware and Flash Equipment
Topic: Consequences of trying to disable CIRAM in clones that don't allow it?
Replies: 22
Views: 5725

Re: Consequences of trying to disable CIRAM in clones that don't allow it?

What happens when cartridges try to disable the internal CIRAM in clones where it's permanently enabled? I hear people saying that "games don't work", but what exactly is the visual result of trying to use these cartridges? In most cases pin for disabling ciram is used for detecting cartridge prese...
by pakosup
Mon Jun 01, 2020 1:05 pm
Forum: NES Hardware and Flash Equipment
Topic: Recommendation for dev cart?
Replies: 10
Views: 2075

Re: Recommendation for dev cart?

So dev cartridge is needed for testing purposes from time to time. I know that invitenes has some integration with assembler studio to debug in realtime on hardware. But i'm not sure that everdrive has something similar. So for debugging you don't have good alternatives to emulators. Topic starter h...
by pakosup
Mon Jun 01, 2020 7:45 am
Forum: NES Hardware and Flash Equipment
Topic: Recommendation for dev cart?
Replies: 10
Views: 2075

Re: Recommendation for dev cart?

Nowadays for retro gamedev you can use emulator. The only reason of using dev cartridge is unique hardware.
Also everdrive clone doesn't have much difference from original, so it can be used in the same way.
by pakosup
Fri May 29, 2020 5:31 am
Forum: NES Hardware and Flash Equipment
Topic: Famicom Grey Screen (no games running)
Replies: 13
Views: 4194

Re: Famicom Grey Screen (no games running)

Dwedit wrote:
Tue May 26, 2020 5:00 pm
Two bad CPUs sounds unlikely
It is quite real situation. I have repaired famicom where both cpu are gone due to short circuit in cartridge.

But it is better to buy replacement famicom board on ebay than buy chinese cpu. It is really high chance to get faulty cpu from aliexpess.
by pakosup
Sun May 24, 2020 2:03 pm
Forum: NES Hardware and Flash Equipment
Topic: CoolBaby X7 Pocket Famicom teardown
Replies: 6
Views: 15931

Re: CoolBaby X7 Pocket Famicom teardown

Good job!
Seems I know one more console with the same schematics
Coolbaby RS 40
https://aliexpress.ru/item/33005168169.html

It also has problems with some cartridges and fails on chr ram test.
by pakosup
Sat May 09, 2020 10:48 am
Forum: NES Hardware and Flash Equipment
Topic: 4-screen mirroring in Gauntlet
Replies: 6
Views: 2156

Re: 4-screen mirroring in Gauntlet

lidnariq wrote:
Mon May 04, 2020 11:11 am
There's pedantically no "CHR RAM" on Gauntlet – it's only used for nametables.
Thank you. I also forgot about TQROM.

I've done my copies of Gauntlet and Rad Racer II for famicom. First run shown garbled graphics because I forgot that A10 and A11 of RAM should be tied to cartridge pins directly.
by pakosup
Mon May 04, 2020 7:17 am
Forum: NES Hardware and Flash Equipment
Topic: Forever DUO 852 Games of NES (405+447)
Replies: 14
Views: 3951

Re: Forever DUO 852 Games of NES (405+447)

What does that mean? Is Forever DUO 852 Games of NES a Coolgirl cartridge, then? Because the bank register writes do not look like it. No, but it can be modified (new wiring and updating FPGA program) to use ROMs that created in Coolgirl ROM builder. FPGA is cheaper so only few mappers are availabl...
by pakosup
Mon May 04, 2020 7:05 am
Forum: NES Hardware and Flash Equipment
Topic: 4-screen mirroring in Gauntlet
Replies: 6
Views: 2156

4-screen mirroring in Gauntlet

I want to understand how 4-screen mirroring implemented in DRROM board. Seemsq Gauntlet the only game that uses this approach (combine CHR RAM and ROM).
Is it correct wiring?

CIRAM /CE is tied to VCC
PA13 is tied to CHR ROM /CE
/PA13 is tied to CHR RAM /CE
by pakosup
Mon Apr 06, 2020 9:56 pm
Forum: NES Hardware and Flash Equipment
Topic: Forever DUO 852 Games of NES (405+447)
Replies: 14
Views: 3951

Re: Forever DUO 852 Games of NES (405+447)

This board was discussed some time ago on emu-land http://www.emu-land.net/forum/index.php ... msg1428464
Scheme was changed to work with Cluster's dumper and ROM builder. Also some mapper kits are available.