ROM Emulation

For hardware talk only (please avoid ROM dumper stuff)
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HardWareMan
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Post by HardWareMan » Thu Dec 18, 2008 3:38 am

Whoa... I did not think this will cause a this kind reaction ... I don't know, I have to think about it.
Nemesis, Snake where you are geographically?

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Nemesis
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Post by Nemesis » Thu Dec 18, 2008 6:22 am

I'm in Sydney, Australia.

masyanya
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Post by masyanya » Thu Dec 18, 2008 6:35 am

Hi there! :arrow:
I'm, masyanya, originally USB->GENESIS/MD card creator. :D

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HardWareMan
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Post by HardWareMan » Thu Dec 18, 2008 6:39 am

masyanya wrote:Hi there! :arrow:
I'm, masyanya, originally USB->GENESIS/MD card creator. :D
Hi, now you take care about this situation? I think we must help this great people on this great forum. ;)

Eke
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Post by Eke » Thu Dec 18, 2008 9:33 am

Tell us your price :)

If you are going to take some order, I definitely would place one, the design is really great

notaz
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Post by notaz » Thu Dec 18, 2008 10:18 am

True. I think there would be quite a lot people interested.

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TmEE co.(TM)
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Post by TmEE co.(TM) » Thu Dec 18, 2008 10:46 am

I didn't lie when I said there's a lot of people who are interested in USB flashcarts ;)
Mida sa loed ? Nagunii aru ei saa ;)
http://www.tmeeco.eu
Files of all broken links and images of mine are found here : http://www.tmeeco.eu/FileDen

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Jorge Nuno
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Post by Jorge Nuno » Thu Dec 18, 2008 10:47 am

Woot professional design in there HWMan and masyanya :D .

Some questions:

I can see a voltage regulator in there, but are the devices 5V tolerant on the IOs?

With that FRAM memory only a few games can save because otheres might save bytes in the other half word of the bus, yes? You could use a MRAM from freescale, because they have 16bit width.

Why did you use 2 pieces of flash memory?

Is the cart reprogamable with the MD on?

And on the computer side, did you made the programming interface?


I'm also designing a DRAM cart, but it's nothing awesome compared to this 8)

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Gerrie
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Post by Gerrie » Thu Dec 18, 2008 12:09 pm

I'm interested as well :) Is it 32X compatible ?

Location: Sas van Gent, The Netherlands

Snake
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Post by Snake » Thu Dec 18, 2008 4:53 pm

Currently I'm in Vancouver, Canada. And none of my PCs have a parallel port, so USB is a must...

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HardWareMan
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Post by HardWareMan » Thu Dec 18, 2008 4:57 pm

I start answer for questions, Masyanya will correct me, if needed.
Jorge Nuno wrote:I can see a voltage regulator in there, but are the devices 5V tolerant on the IOs?
I think yes. All of the in datasheet parameters.
Jorge Nuno wrote:With that FRAM memory only a few games can save because otheres might save bytes in the other half word of the bus, yes? You could use a MRAM from freescale, because they have 16bit width.
Show me game from GoodGen ROMset, that used 16 bit SRAM or hi byte (D8-D15).
Jorge Nuno wrote:Why did you use 2 pieces of flash memory?
Two 16Mbit FLASHes are more cheaper and available, than one 32Mbits for me. That's all.
Jorge Nuno wrote:Is the cart reprogamable with the MD on?
Yes. It can be programmed when inserted in MD. But I don't sure, how it will be work, when MD power is on. Strongly recommended pull out this FLASH cart when programming.
Jorge Nuno wrote:And on the computer side, did you made the programming interface?
Yes. There is software (including device driver). It allow you to read/write ROM and/or SRAM. It has programming counter and you may see how many times you was burn it's FLASH.
ImageImage
Jorge Nuno wrote:I'm also designing a DRAM cart, but it's nothing awesome compared to this 8)
Yeah, I want to use DRAM or SDRAM too. Want to RAM cartrige with 4 or even 8 MBytes. For development purpose. It will be used with SD/MMC card addon.
Gerrie wrote:I'm interested as well :) Is it 32X compatible ?
I don't have 32x mushroom. So I can't answer for this question. What difference between MD cart and 32x cart?
Snake wrote:Currently I'm in Vancouver, Canada. And none of my PCs have a parallel port, so USB is a must...
Whoa. You guys spreaded around the world...
I am from Kazakhstan and Masyanya from Russia.

Snake
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Post by Snake » Thu Dec 18, 2008 8:06 pm

HardWareMan wrote:I don't have 32x mushroom.
Hehe :) I'm glad everybody adopted my little nickname for the 32x.

It should be fine. The only problems are possible corruption (which, being read only, shouldn't matter) and that it needs to be a bit faster than a Genesis cart does (which I'm sure it will be anyway).

SmartOne
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Post by SmartOne » Thu Dec 18, 2008 9:36 pm

I spent $100 on my Tototek cart + programmer. Having to use a parallel port stinks, especially when you still need the USB cable attached for the 5V it provides. :P I'd better get some use out it! :o

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TmEE co.(TM)
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Post by TmEE co.(TM) » Thu Dec 18, 2008 10:42 pm

32X will not like ROMs that are too slow, my flashcart has 90ns flash chips and I've got no problems. 120ns or slower will probably have problems, but I've not seen that slow big flash chips.
Mida sa loed ? Nagunii aru ei saa ;)
http://www.tmeeco.eu
Files of all broken links and images of mine are found here : http://www.tmeeco.eu/FileDen

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ElBarto
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Post by ElBarto » Fri Dec 19, 2008 12:19 am

Seriously guys this is really impressive, the pcb and the software look more than professional.
As every one else, tell me where to send the money :)
PS : I'm from France.

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