Zig's SNES Repros

[electrochip]

Right, MAD pin 13 going to cart pin 48 on the ToP cart, that's A22 on normal Hirom 36 pin carts. You can see the pinout here. It won't work without MAD pin 13 going cart pin 48/A22

[jeffro11]

I made a Bahamut Lagoon cart differently then others do it.. Pics:

[Ziggy]

Right, MAD pin 13 going to cart pin 48 on the ToP cart, that's A22 on normal Hirom 36 pin carts. You can see the pinout here. It won't work without MAD pin 13 going cart pin 48/A22

Ah, I gotcha. I guess I was having a brain fart. Because that pin on the adapters is not connected, so you're just using it because it traces back to cart connector.

I made a Bahamut Lagoon cart differently then others do it.. Pics:

Completely awesome.

[electrochip]

Ah, I gotcha. I guess I was having a brain fart. Because that pin on the adapters is not connected, so you're just using it because it traces back to cart connector.

Correct, it traces back to that point. For me it's easier and cleaner to lift that pin and solder to it, rather than to solder to the cart connector directly.

[Ziggy]

Right, it's definitely a cleaner way to do it. I didn't have a choice in my case, though, since it was 32-pin sockets.

[electrochip]

Right, it's definitely a cleaner way to do it. I didn't have a choice in my case, though, since it was 32-pin sockets.

I was merely referring to the other post where it kinda sounded like you were asking me why I didn't solder to the cart connector. I understand why you had to solder to the connector since the 32 pin snes cart was missing address lines. It's good to see people adapting the concept in different ways.

[Ziggy]

No, I understand completely. I was just having a brain fart when I asked you about the A22 connection. I forgot that the adapter leaves that pin unconnected.

[Ziggy]

Don't know if this is old news, but I figured I'd post the info in case it can help any one out. I've never seen anyone use an AM27C040 (or equivalent M27C4001) on a SNES board before, but I got it working.

I hate having to use a memory larger than the image, I just feel like it's a waste. So in this case, using an 8Mb EPROM for a 4Mb game. Or for example, the rare occasion you have a 12Mbit or 20Mbit game. Yes, I realize you can pad the ROM to fit the next biggest memory.

Moving along... The 040 has the same pinout as an 801 but with one exception. The 801's OE pin is also its Vpp pin (they're one and the same). The 040 is missing A19, it instead has Vpp where 801's A19 is. See a comparison of the pinouts to see what I mean...

http://i59.photobucket.com/albums/g295/ ... 0vs801.jpg

I was pretty sure it would work without the A19, but I never seen anyone use a 040 before so I was thinking, "Maybe there's a reason why?" Long story short, I put a 4Mb game on an 040 and got it working...



At first I left the Vpp on the 040 unconnected and tried it out. When I turned the game on I got the first logo splash screen, but the next screen froze up with garbled graphics. Weird. So, I just jumped OE to Vpp and now it works perfectly.

[bartre]

that's pretty interesting, do you think it would work for a game with a save, such as Terranigma?

[electrochip]

that's pretty interesting, do you think it would work for a game with a save, such as Terranigma?

You could use it to make a game that saves, but you do know that

M27C801= 1 MegaByte
M27C4001 = 512 KiloByte ( .5 MegaByte)

It would take 8 of those and an 74ls138 to make a Terranigma.