Search found 16 matches

by illuminerdi
Thu May 02, 2019 4:11 pm
Forum: Reproduction
Topic: Tengai Makyou Zero / Far East of Eden Zero English Repro
Replies: 23
Views: 11877

Re: Tengai Makyou Zero / Far East of Eden Zero English Repro

No, I don't think so. I saw only the following chips: 1 16 megabit (2 Megabyte, 2 Mi x 8b) 5V flash 3 voltage translation ICs, part number unknown, all in 20-pin TSSOPs 1 3V regulator in SOT-23 1 64 megabit (8 Megabyte, 4 Mi x 16b) 3V flash 1 74'32 1 74'00 I didn't realize there was such a thing as...
by illuminerdi
Thu May 02, 2019 12:43 pm
Forum: Reproduction
Topic: Tengai Makyou Zero / Far East of Eden Zero English Repro
Replies: 23
Views: 11877

Re: Tengai Makyou Zero / Far East of Eden Zero English Repro

That's not what what I was trying to say... If A23 is low and A22 is high and A21 is low and A20 is low, then the output should be low. I see what you mean - I'll need to run wires off of A23+A22+A21+A20 so that when all 4 line up to the scenario you listed, THEN set the output to low for that chip...
by illuminerdi
Thu May 02, 2019 8:52 am
Forum: Reproduction
Topic: Tengai Makyou Zero / Far East of Eden Zero English Repro
Replies: 23
Views: 11877

Re: Tengai Makyou Zero / Far East of Eden Zero English Repro

No demultiplexers. For whatever reason, the equivalent logic is built out of a 74'00 and 74'32. As we mentioned in the other thread about demultiplexers / selectors, a demux emits a signal that is "true" (low, in the case of 74'138 and 74'139) when the inputs are correct. The ROMs also want a signa...
by illuminerdi
Wed May 01, 2019 8:14 am
Forum: Reproduction
Topic: Tengai Makyou Zero / Far East of Eden Zero English Repro
Replies: 23
Views: 11877

Re: Tengai Makyou Zero / Far East of Eden Zero English Repro

Yeah the other downside of that pic is that I can't see the underside of their add-on PCB which has a bunch of circuit traces on it showing which pins are routed where. But you don't need to. All ROMs used originally on the SNES used standard footprints, and there's no connections between the OEM P...
by illuminerdi
Tue Apr 30, 2019 12:42 pm
Forum: Reproduction
Topic: Tengai Makyou Zero / Far East of Eden Zero English Repro
Replies: 23
Views: 11877

Re: Tengai Makyou Zero / Far East of Eden Zero English Repro

If your goal is to research and document how to reproduce the cartridge with all new parts I'm all for it. But I thought the SPC7110 was a custom chip? BTW it's actually spelled Momotarou Dentetsu which is a boardgame spin-off of Hudson's Momotarou Densetsu series (densetsu = legend, dentetsu = ele...
by illuminerdi
Tue Apr 30, 2019 7:54 am
Forum: Reproduction
Topic: Tengai Makyou Zero / Far East of Eden Zero English Repro
Replies: 23
Views: 11877

Re: Tengai Makyou Zero / Far East of Eden Zero English Repro

To me, all of this indicates the romhack most likely uses a complete custom memory map layout of some sort. If they're requiring a unique/custom manifest XML (for higan/bsnes), and state that "it won't work on flash carts" (without any explanation) but that "it will work on real hardware" (also wit...
by illuminerdi
Tue Apr 30, 2019 7:42 am
Forum: Reproduction
Topic: Tengai Makyou Zero / Far East of Eden Zero English Repro
Replies: 23
Views: 11877

Re: Tengai Makyou Zero / Far East of Eden Zero English Repro

The differences indicate: you'll need to divide the resulting patched result into the first 1M ("Program"), middle 5M ("Data"), and last 1M ("Expansion"). The bundled "HiganFileSplitter" does this. you'll need to find where SPC7110 A22 exists. It assuredly does, because they say it works on actual ...
by illuminerdi
Tue Apr 30, 2019 7:31 am
Forum: Reproduction
Topic: Tengai Makyou Zero / Far East of Eden Zero English Repro
Replies: 23
Views: 11877

Re: Tengai Makyou Zero / Far East of Eden Zero English Repro

RetroCircuits makes the conversion and this is what their board looks like. The rom does have proper down level-shifting so that's good. Yeah the other downside of that pic is that I can't see the underside of their add-on PCB which has a bunch of circuit traces on it showing which pins are routed ...
by illuminerdi
Tue Apr 30, 2019 7:20 am
Forum: Reproduction
Topic: Tengai Makyou Zero / Far East of Eden Zero English Repro
Replies: 23
Views: 11877

Re: Tengai Makyou Zero / Far East of Eden Zero English Repro

The PCB used in the official cartridge is an SHVC-LDH3C-01, which was used by one -- and only one -- title: the one mentioned here. The SPC7110F appears to be a custom graphicsdecompression chip of some sort, tied to a "data ROM" of some kind, and has an additional chip that offers a battery-backed...
by illuminerdi
Tue Apr 30, 2019 7:16 am
Forum: Reproduction
Topic: Tengai Makyou Zero / Far East of Eden Zero English Repro
Replies: 23
Views: 11877

Re: Tengai Makyou Zero / Far East of Eden Zero English Repro

The PCB used in the official cartridge is an SHVC-LDH3C-01 , which was used by one -- and only one -- title: the one mentioned here. The SPC7110F appears to be a custom graphicsdecompression chip of some sort, tied to a "data ROM" of some kind, and has an additional chip that offers a battery-backe...
by illuminerdi
Mon Apr 29, 2019 3:34 pm
Forum: Reproduction
Topic: Tengai Makyou Zero / Far East of Eden Zero English Repro
Replies: 23
Views: 11877

Tengai Makyou Zero / Far East of Eden Zero English Repro

Does anyone here have any idea how to convert a copy of Tengai Makyou Zero (Far East of Eden Zero) cart to use the translated English rom? I have an original TMZ donor cart, and the necessary tools to desolder the original mask rom, but apparently the translation patch expands the ROM size, so it's ...
by illuminerdi
Mon Apr 29, 2019 1:10 pm
Forum: SNESdev
Topic: Purpose of MAD-1 and 74139 logic for single ROM boards?
Replies: 23
Views: 23909

Re: Purpose of MAD-1 and 74139 logic for single ROM boards?

Ok so I was way off - I thought the MAD-1 and/or 74'139 chips were required to address portions of memory within a game's ROM even in scenarios when the game uses a single ROM with no SRAM on the PCB. Apparently that is not the case and they are only required when a cart either uses multiple ROM chi...
by illuminerdi
Mon Apr 29, 2019 12:11 pm
Forum: SNESdev
Topic: Purpose of MAD-1 and 74139 logic for single ROM boards?
Replies: 23
Views: 23909

Re: Purpose of MAD-1 and 74139 logic for single ROM boards?

I think my real problem is that I don't understand SNES memory addressing well enough. I'm reading through https://en.wikibooks.org/wiki/Super_NES_Programming/SNES_memory_map and it doesn't quite make sense. If banks are notated as $00-$FF, that's still only an 8-bit bitmask, so selecting any of th...
by illuminerdi
Mon Apr 29, 2019 10:29 am
Forum: SNESdev
Topic: Purpose of MAD-1 and 74139 logic for single ROM boards?
Replies: 23
Views: 23909

Re: Purpose of MAD-1 and 74139 logic for single ROM boards?

A "demultiplexer" is kind of the opposite. Instead of getting one thing out, you instead put one thing in, and it puts it in the right place. Think of one of those robots that sorts candy by color. Because there are entirely independent demultiplexers inside. Thank you for the explanation - I'm act...
by illuminerdi
Mon Apr 29, 2019 7:28 am
Forum: SNESdev
Topic: Purpose of MAD-1 and 74139 logic for single ROM boards?
Replies: 23
Views: 23909

Re: Purpose of MAD-1 and 74139 logic for single ROM boards?

nocash wrote:It's easier to understand if you are aware that posts about 74139 are unrelated to those about 74157.
Well they're two sides of the same coin in the sense that one is a multiplexer and the other is a demultiplexer.