Mapper Megaram 512 issues

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By RatGod

Supporter (5)

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10-04-2022, 18:35

Pentarou wrote:

To boot to DOS2/Nextor in your machine, the switches need to be set to "ON" and "MP".

Thank you, that's what I was wondering. That clears a lot of confusion.

Pentarou wrote:

What does exactly mean "it doesn't boot off of it" ??
If you get the Nextor basic prompt, then type "files". If you get a list of files it means that your SD card isn't correctly formatted or is missing the Nextor boot files or you have less than 128KB of RAM.
If it's stuck at the blue screen and you are sure that the SD card is good and correctly formatted then you should contact the seller.

The first thing I did was partition the SD card with the CALL FDISK command it partitioned the SD card to less than 16 MB. It did this by default.

I've used your past posts to try to set this up. I put the command2 file and the Nextor.sys along with SR with the sofarun files.autoexec.bat as well. I never got the opportunity to enter any Nextor commands. Is there something I put into basic to be able to access Nextor? The only trace of it is it briefly showing slot info at the beggining after msx logo at startup. If I flip the switches, it will actually stay on this screen. I cannot put in any commands on this page.

I am at work on break trying to type this out on my phone as fast as I can. This is actually the second time I wrote this out, I somehow refreshed on accident!!

I apologize for the photos being so tiny. That's embarrassing. I have a lot to learn and I really appreciate the help.

By Pentarou

Champion (433)

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10-04-2022, 18:50

I was looking at the photo below and noticed that your Command2 file is missing the extension (COM)..

By Manuel

Ascended (18844)

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10-04-2022, 19:23

@Pentarou isn't that a Windows Explorer feature? It hides extensions of files that are known... (very stupid if you ask me, but hey... it's Windows...)

By Jip

Supporter (1)

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11-04-2022, 16:32

I think it does hide extensions in the screenprint that was provided, so there is indeed COMMAND2.COM on the SD Card, however as you can see also AUTOEXEC.BAT is shown but considering explorer is hiding file names the actual file name is AUTOEXEC.BAT.TXT so it will never autoexecute this way.

You have to to go to explorer then "view" and then check "filename extensions". After that rename everything to their right extensions.

By Pentarou

Champion (433)

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11-04-2022, 21:04

I thought about Windows hiding the extensions, so I did check on my W10 machine and .COM was showing Question (Note: I NEVER use explorer so I though that was the default settings).

Well, anyway if filenames are correct, then another possible point of failure could be the firmware interfering with the cartridge.

RatGod wrote:

The first thing I did was partition the SD card with the CALL FDISK command it partitioned the SD card to less than 16 MB. It did this by default.

But then you did partition it again, and this time with a larger size?
You didn't left it as FAT12, right?

By Manuel

Ascended (18844)

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13-04-2022, 12:08

https://youtu.be/VSEgiILdUWY to get an impression on what it should do.

By RatGod

Supporter (5)

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25-04-2022, 19:08

Jip wrote:

You have to to go to explorer then "view" and then check "filename extensions". After that rename everything to their right extensions.

Thank you very much, that's really good to know!

And thanks to everyone else as well. After rmuch frustration I decided to return this cartridge, and get another from a more reputable and responsive seller. Ill put the eBay Link up.

By zadokallen

Resident (45)

zadokallen さんの画像

26-04-2022, 16:01

115 USD for a 512k Mapper Megaram cart is quite a lot. At this price range you'd be better of looking at Carnivore 2 or MegaFlashRom.

EDIT: ok, I see you're probably in Brasil yourself, so the situation there might be different.

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