Difference between MSX SD Mapper & Megaram 512Kb and the MegaFlashRom with 512k?

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By gdx

Prophet (2976)

gdx's picture

03-11-2018, 15:59

sd_snatcher wrote:

- 8bits4ever has black-painted screws to close the plastic shell. Fractal2000 uses screws with Zinc Yellow Bichromated finish to avoid rust in the long term

I do not think the black screw rust more than the other and it's more aesthetic.

sd_snatcher wrote:

- The Brazilian models have a much more careful design of the PCB, drawn by none other than MSXpro

This is not the impression it gives me. I used the conditional.

sd_snatcher wrote:

I would like to politely ask you to stop including misinformation in the MSX-Wiki. If you're not sure, please open a thread beforehand here in the forums, ask questions, and only then proceed to create a reliable Wiki article.

Do you really believe you know the truth about everything? The wiki is not done alone and information is sometimes hard to find. We have to start with something. I corrected many mistakes and even from you. Others corrected several mistakes I made. The wiki goes like this. It's not the (unkind) remarks you make now that will move the wiki forward.

By sd_snatcher

Prophet (3044)

sd_snatcher's picture

03-11-2018, 18:47

gdx wrote:
sd_snatcher wrote:

- 8bits4ever has black-painted screws to close the plastic shell. Fractal2000 uses screws with Zinc Yellow Bichromated finish to avoid rust in the long term

I do not think the black screw rust more than the other and it's more aesthetic.

I just explained the reason why Fractal2000 uses using Zinc Yellow Bichromated screws. The rest is just up to personal taste.

Quote:
sd_snatcher wrote:

- The Brazilian models have a much more careful design of the PCB, drawn by none other than MSXpro

This is not the impression it gives me. I used the conditional.

Well, I wasn't aware of your expertise in PCBs design. Other experts I know tend to praise this design.

If you share here what you think that could be improved on the design, they could take it into consideration.

Also, it's an open source design. Since you have the skills, you can also go to the github and contribute to improve the layout.

Quote:
sd_snatcher wrote:

I would like to politely ask you to stop including misinformation in the MSX-Wiki. If you're not sure, please open a thread beforehand here in the forums, ask questions, and only then proceed to create a reliable Wiki article.

Do you really believe you know the truth about everything? The wiki is not done alone and information is sometimes hard to find. We have to start with something. I corrected many mistakes and even from you. Others corrected several mistakes I made. The wiki goes like this. It's not the (unkind) remarks you make now that will move the wiki forward.

It wasn't my intention to be unkind, this is why I emphasised the politely part. If it sounded unkind, I apologise.

I never said I know the truth about everything. I'm just politely saying that what you've been writing on the wiki can cause damage to the image of others. You might certainly might have corrected my mistakes in the wiki, but I always take care to not write something that can cause problems to those in the community who are still active and trying to create things. If you ever corrected this kind of mistake from me there, I would be glad to know what, in order to avoid repeating it again.

You felt that my remarks were unkind, but have you thought before if your remarks were not being unkind or unfair to those involved in the SD-mapper project and building?

By gdx

Prophet (2976)

gdx's picture

04-11-2018, 08:53

The author of this thread asks for the differences between two interfaces. I give my opinion according to my knowledge. For example, I only found photos of PCBs with tin-plated contacts for the fractal2000 version (my impression was based on that). Indicate the defects allows to correct them. I think it is beneficial for all. I was wrong but the fault comes from the lack of information. I also created the wiki to note what comes out to clarify the subject. For me too, it was a bit obscure. Now, it is much less so and I thank you.

sd_snatcher wrote:

You wrote about the MegaRAM feature form a very negative point of view, when in fact it's meant as a bonus for when the user's machine already has an internal memory mapper, since two mappers on the same machine would be less useful than a mapper and an external MegaRAM.

I do not agree. Yes, the MegaRAM mode is an extra. I indicate the limits of it because if a guy has an MSX1 of less than 64K, he needs to know that this option is useless for him. And with an MSX1/2/2+ of 64kB, the MegaRAM mode will only be usable under MSX-DOS1. So the MegaflashRom + SD is better suited for them. I do not understand why you deleted this information that I think is important. When a user buys a product that is unsuitable for their needs, it does not help the community. Rather, it will hesitate to buy something else next time.

By sd_snatcher

Prophet (3044)

sd_snatcher's picture

04-11-2018, 16:29

gdx wrote:

The author of this thread asks for the differences between two interfaces. I give my opinion according to my knowledge.

Well, I didn't see you write about the MFRSCC+SD that doesn't have internal mapper with the same kind of negative adjectives.

And I'm not saying that you should. I personally like Manuel Pazos' work on that device.

I'm just complaining about dual standards here. And this was clear when the 8bits4ever hardware, which is based on exact same design was praised against the Fractal2000 model.

"8bit4ever version seems better than Fratal2000 and cheaper."

Quote:

For example, I only found photos of PCBs with tin-plated contacts for the fractal2000 version (my impression was based on that). Indicate the defects allows to correct them.

I think it is beneficial for all. I was wrong but the fault comes from the lack of information. I also created the wiki to note what comes out to clarify the subject. For me too, it was a bit obscure. Now, it is much less so and I thank you.

I understand your intentions, but sadly the misunderstanding about who was the hardware maker of some of the cartridges caused some of the criticism to be directed to the wrong person.

And the criticism about the Belavenuto's and MSXpro design was totally unfounded, as became clear after it was clarified that the then praised 8bit4ever hardware was based on exact the same design and features.

Quote:

I do not agree. Yes, the MegaRAM mode is an extra. I indicate the limits of it because if a guy has an MSX1 of less than 64K, he needs to know that this option is useless for him. And with an MSX1/2/2+ of 64kB, the MegaRAM mode will only be usable under MSX-DOS1. So the MegaflashRom + SD is better suited for them.

If that was the case, why wasn't it written under the same negative light (aka "useless") on the 8bit4ever SD-512 wiki article too? When someone emit strong opinions, they better be well informed and well prepared to explain why.

Quote:

I do not understand why you deleted this information that I think is important. When a user buys a product that is unsuitable for their needs, it does not help the community. Rather, it will hesitate to buy something else next time.

I didn't delete, I just rewrote it without strong opinions. And I thought you liked it, when you copied the text ipsis litteris to the SD-512 article. If that strong opinion wasn't so important, why didn't you add it to the SD-512 article when you edited it?

Anyway, personal points of view aside, I rewrote the text to make it more clear to novice users that more than 64KB of internal RAM is required to use the MegaRAM feature. It's written from a neutral point of view as recommended by any Wiki editing guidelines. Opinions about if this is a bonus, a "useless" or a "very limited" feature are left to the reader.

I also corrected the PCB photo and deleted this incorrect photo from the article, since it belongs to a different maker. I don't know how to remove that file from this Wiki (or rename it), so feel free to do the cleaning of the incorrect info there.

By hamlet

Scribe (2456)

hamlet's picture

04-11-2018, 16:56

Well, I am very glad that such a variety of hardware extensions exists. For me as a European it is very expensive to import hardware from overseas, the customs duties are considerable. I really appreciate the work these specialists do in their spare time. There is no reason to belittle this work of one or the other. Thank you sd_snatcher for your tireless work. many of us are just profiting from your projects. And thank you gdx for your effort to keep the WiKi of the MRC up to date. You put a lot of effort and work into this. The fact that sometimes mistakes happen here is quite natural. You both do it great! Respect the others! Thanks!

By sdsnatcher73

Hero (529)

sdsnatcher73's picture

04-11-2018, 20:00

What is very true about all this, and I think important to the original poster’s question:

1. What MSX you have makes certain features in certain cartridges unusable.
2. Your usecase influences what cart you should get.
3. Your budget does too Wink

So @engineer: what MSX do you have? How do you intend to use the cartridges? Depending on the answers we can suggest which carts work for that (this may include others that you have not looked at so far...)

By gdx

Prophet (2976)

gdx's picture

05-11-2018, 08:52

sd_snatcher wrote:

If that strong opinion wasn't so important, why didn't you add it to the SD-512 article when you edited it?

When I run out of time, I stop editing. Sometimes, I resume several days later. This is the case, the Bios of the main Rom.
It also happens that I put very incomplete information for lack of time or when I can not find or containing some potentially false parts. This is the case for the list of other different versions of the joystick Sanwa Pasoko-1000.

By japanretroCT

Expert (124)

japanretroCT's picture

29-07-2019, 12:26

Hi , I have one of this card in a 64kb msx2....When i put in megaram mode i cant load msxdos 2 and go in basic...
How i can use sofarun to load 512kb rom on megaram?

By Grauw

Ascended (8366)

Grauw's picture

29-07-2019, 14:21

You need a separate cart or an MSX with 128K to do that.

It is the downside of this cartridge I think, it can only be in the one or the other mode at a time.

Quoting the wiki page:

Quote:

When your machine has an internal memory mapper of its own, you can switch the cartridge memory expansion mode to the MegaRAM mode, to be able to easily load MegaROM games with software like ExecROM or SofaRun.

Other cartridges have separate ROM flash memory (e.g. MegaFlashROM, Carnivore2) or dynamically assign memory (GR8NET), which avoids this problem.

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