ROM Emulation
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- Very interested
- Posts: 745
- Joined: Sat Dec 15, 2007 7:49 am
- Location: Kazakhstan, Pavlodar
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- Very interested
- Posts: 745
- Joined: Sat Dec 15, 2007 7:49 am
- Location: Kazakhstan, Pavlodar
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- Very interested
- Posts: 2440
- Joined: Tue Dec 05, 2006 1:37 pm
- Location: Estonia, Rapla City
- Contact:
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
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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- Very interested
- Posts: 374
- Joined: Mon Jun 11, 2007 3:09 am
- Location: Azeitão, PT
Woot professional design in there HWMan and masyanya .
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
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
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- Very interested
- Posts: 745
- Joined: Sat Dec 15, 2007 7:49 am
- Location: Kazakhstan, Pavlodar
I start answer for questions, Masyanya will correct me, if needed.
I am from Kazakhstan and Masyanya from Russia.
I think yes. All of the in datasheet parameters.Jorge Nuno wrote:I can see a voltage regulator in there, but are the devices 5V tolerant on the IOs?
Show me game from GoodGen ROMset, that used 16 bit SRAM or hi byte (D8-D15).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.
Two 16Mbit FLASHes are more cheaper and available, than one 32Mbits for me. That's all.Jorge Nuno wrote:Why did you use 2 pieces of flash memory?
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:Is the cart reprogamable with the MD on?
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.Jorge Nuno wrote:And on the computer side, did you made the programming interface?
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.Jorge Nuno wrote:I'm also designing a DRAM cart, but it's nothing awesome compared to this
I don't have 32x mushroom. So I can't answer for this question. What difference between MD cart and 32x cart?Gerrie wrote:I'm interested as well Is it 32X compatible ?
Whoa. You guys spreaded around the world...Snake wrote:Currently I'm in Vancouver, Canada. And none of my PCs have a parallel port, so USB is a must...
I am from Kazakhstan and Masyanya from Russia.
Hehe I'm glad everybody adopted my little nickname for the 32x.HardWareMan wrote:I don't have 32x mushroom.
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).
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- Very interested
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- Joined: Tue Dec 05, 2006 1:37 pm
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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
http://www.tmeeco.eu
Files of all broken links and images of mine are found here : http://www.tmeeco.eu/FileDen