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FM18W08 unit price: qty 1 28$, qty 1000 19$. Yikes, the only way those chinese can afford to put them in snes repros if they can pull them for free from some junked equipment. Mouser and Digikey sells them for $17 range... the 64k version is around $9....still too expensive. How fast does a sram ne...

snescentral wrote: ↑

Fri May 15, 2020 10:37 pm

For completeness, would you be able to also take a picture of the back?

I will hopefully do an update this weekend.

Well, where the heck did I put it??? Here is the 1L8B-01 bottom side. I'll try and find the other one.....

The other 1L8B pcb

here's the 1L8B-10

Note that I replaced the electrolytic cap with a SMT one...

Ice Man wrote: ↑

Mon May 04, 2020 10:03 am

SHVC-1A7M for Dezaemon is missing, too.
Sadly I don't own the carts missing otherwise I'd help out.

Here’s a pic of it.
http://dforce3000.de/index.php?p=fdsingle&uid=397

I never knew this even existed! Is the sram mapping linear?A0-A16 from the buss?

http://snescentral.com/pcbboards.php?chip=SHVC-1A8F-01 this one seems to have incorrect information. It lists SRAM and RTC. It just looks like it was form data and these fields weren't deleted? same goes for this one http://snescentral.com/pcbboards.php?chip=SHVC-1A9F-01 Also, the 1L8B SA1 pcbs aren...

hi to all the community, this is my first post so here i go!, so i triying to make a tales of phantasia repro cart (for my personal use of course!) using a shvc-bj3m-01 board and 3 27c160 eproms, i make the connections, lift the mad-1 pin 4 and all but my problem comes here, i tried to use a 74ls13...

hi to all the community, this is my first post so here i go!, so i triying to make a tales of phantasia repro cart (for my personal use of course!) using a shvc-bj3m-01 board and 3 27c160 eproms, i make the connections, lift the mad-1 pin 4 and all but my problem comes here, i tried to use a 74ls13...

But why would it work better (or always) in 50Hz PAL SNES? And Retrostage's SNES MegaROM PCB is similar. CIC to the left and the MUXes right next to it and it works. Actually retrostage had reset issues too, in some of his earlier designs. Maybe he has better ground flooding. I am not familiar with...

The TL866 II Plus programmer automatically does that. Otherwise it would happen in the original SHVC-1A0N board as well and with any region, which it does not. Found another 12F629 (this time in SO8) laying around + an adapter I made to suit the original CIC to replace 1-1. Those have worked perfec...

BTW since flash works as ROM here data will be directed only one way, which means no need to convert data lines, isnt it ? The ROM data buss is the same buss as the SRAM and internal RAM also. This means it's all connected. Addresses are inputs... needing down translating. Data lines are outputs (a...

Does that mean Benn Venn here is wrong ? https://www.youtube.com/watch?v=vv4TeyLcSSw Well.... it's hard to say...... His video is assuming the flash chips can still be safely powered by 4.6v, which in most data sheets for the available flash roms, is beyond normal safe operating conditions.... MOST...

I was recently asked about a little known Sufami Turbo game (Car Rangers) and I was intrigued on how this system worked. The Wiki on this system is here: https://en.wikipedia.org/wiki/Sufami_Turbo So I acquired a base and a few sub cartridges to research. Although I have Zero interest in making a re...

Update on this: The MAX4674's were a winner. The game works perfectly with these multiplexers. I don't think most people use the 74HC T 257s, there might be a reason there why it didn't work right. The HCTs are slightly slower per the spec sheet but not by much. I connected /RD to the MAX4674 /EN i...

Thanks for mentioning that. It's not my database and I'm not sure if jensma is actually still working on it but I can let him know. I just glanced at the first page and noticed that. I revisited the page and saw several more instances, not just 32kB/256kb but also 2kB/16kb mixtures. It would be eas...