Accessing SD data on Megaflashrom SCC+ SD on 64kb MSX2+

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Par wyrdwad

Paladin (846)

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05-01-2020, 16:12

That's because it's an SD 512. Mine is not, so that doesn't work for me, unfortunately.

-Tom

Par Pencioner

Scribe (1183)

Portrait de Pencioner

05-01-2020, 16:39

wyrdwad wrote:

Drive A *is* my floppy disk, though? Or does that change based on the state of the system during bootup?

How can I tell which drive letter is which?

And also, what good would copying the MSX-DOS files do? I have MSXDOS.SYS and COMMAND.COM on the microSD card in my MFR, but that doesn't seem to matter -- my system still boots to MSX BASIC, and refuses to boot into anything *but* MSX BASIC even when using CALL SYSTEM. I need a way to make it realize MSX-DOS is on the MFR and boot into it, but again, so far all my attempts at that have been thwarted...

-Tom

All SD/CF solutions will take A: etc letters first because they are located in lower slot number than floppy BIOS (which is usually in subslot of slot #3). So your floppies will have last letters.
If you try to copy DOS1 or DOS2 files and have FAT16 partition this if course wouldn't work. Either you have to make first partition of FAT12 and have DOS1 on it, then add other partitions and set up to mount them to drive letter in autoexec.bat, or you have to use Nextor...

UPDATE: You can use "MiniTool Partition Wizard Free 9.1" - because standard Windows tools doesn't recognize flash media with partitions (only seeing the first). Just create first 32Mb partition FAT12 formatted, then next partition FAT16 formatted. But i'm not sure how would it help to access second partition if you boot into DOS1 - no idea...

Par jltursan

Prophet (2317)

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05-01-2020, 16:49

...and upgrade the WX RAM to 256KB?, it's one of the easiest upgrades out there and this will turn the machine into one of the nicest MSX models.

Par wyrdwad

Paladin (846)

Portrait de wyrdwad

05-01-2020, 16:53

Well, Nextor seems to be out, so I'll have to try the partitioning solution. The problem is, I have NEVER done anything like that before. I assume the Partition Wizard program you recommended would walk me through much of what you just stated, but I have no clue whatsoever how to mount drives in autoexec.bat (not even sure where to begin looking that up), nor do I have any idea how to access the second partition in MSX-DOS 1, as you said. So I still feel like there's a lot of work left to get this functioning on my system...

Thanks for your help, though. To all of you who've replied -- sorry if I've been kind of one-track focused on getting the situation resolved, but it's been frustrating me for hours now. I have an older Megaflashrom with no SD card slots, which requires loading roms via OPFX from floppy disks, and that's been working like a charm for me since I got it. I assumed this one would be much the same, but once you add those SD card slots, everything becomes exponentially more complicated...

-Tom

Par wyrdwad

Paladin (846)

Portrait de wyrdwad

05-01-2020, 17:00

jltursan wrote:

...and upgrade the WX RAM to 256KB?, it's one of the easiest upgrades out there and this will turn the machine into one of the nicest MSX models.

I'd love to! But that's a whole other issue -- I have no idea what RAM chips would work for my system, nor where to find them, and I have NEVER soldered a single thing in my entire life. I'm scared just to open up my MSX for fear of breaking something, as I have literally ZERO experience with hardware. And while I do live in Japan -- and near Akihabara, no less -- it's surprisingly difficult to find the information, parts, or services I'd need to accomplish this upgrade, even here. (I've tried!)

...At least, it is for me, given that I have ZERO CLUE what I'm doing. Wink

That's really my problem in general: I love my MSX due to how easy it is to use and how reliable it is. But the second something stops working, or something even remotely technical lies before me, I basically curl up into the fetal position and wait for it to be over. I'm absolutely hopeless when it comes to anything technical... beyond a certain point, anyway. (I can program fairly well, and dissect/debug code with reasonable efficiency and success, but that seems to be my limit.)

-Tom

Par Meits

Scribe (6015)

Portrait de Meits

05-01-2020, 17:35

The way I see it, it's a matter of softwareconfiguration on the µsd card. The hardware seems to be ok.
Maybe someone can make a fat12 µsd image for you.
Other option would be to try your luck at Manuel Pazos. Maybe you can swap (and pay a little extra) your MFR for a 512K upgraded version and be rid of the issue.
Installing a ram upgrade in your msx is just a matter of courage. When following the right tutorial correctly you can't go wrong. I recently did my first ram upgrade in a vg8235 and that one's quite a bit harder than the wx. Though, you might need to buy quite a bit of gear which might make it more logical to get yourself a turbo R. They're not that rare in Japan Wink

Edit:
My spanish is below freezing point, but with google translate this is quite doable.

Par wyrdwad

Paladin (846)

Portrait de wyrdwad

05-01-2020, 17:32

Yeah, I've seen the turboRs around, but they're expensive. I'd really, really like one, though! It's a dream of mine to one day pick up an ST (I know the GT is the better-specced model, but I just love the gold trim on the ST -- it's a truly sexy-looking system! And it being marginally cheaper than the GT makes it even easier to go with the ST when given the choice. Heheh). Wink

-Tom

Par Meits

Scribe (6015)

Portrait de Meits

05-01-2020, 17:40

There's really no advantage in the GT unless you want to play Illusion City with an MT32.
256K brings you almost the same options as 512K. There are very few pieces of software which require 512K. Knowing you're a gamer, you will most certainly not run into that barrier.

Par Manuel

Ascended (16980)

Portrait de Manuel

05-01-2020, 17:51

Drive A is only your floppy disk if your MFR SD didn't have any partitions.
The point is that MSX-DOS is searched on the first partition.

You can try "FILES" in basic and see what it shows.

Note that DOS1 can't handle FAT16 partitions and such, so without DOS2/Nextor you can't use them and whatever will be on your microSD card will probably be ignored.

Par Grauw

Ascended (9343)

Portrait de Grauw

05-01-2020, 20:14

MegaFlashROM SCC+ SD should come with a ROM disk pre-flashed with all the necessary files and a preconfigured Multi Mente. It makes it very easy to get started. Yours doesn’t? Did you get it directly from Manuel Pazos / MSX Cartridge Shop?

Also, as mentioned you should have the model with 512K memory. Everyone should tbh, I don’t know why Manuel still sells the option without it, there’s too many MSX models which don’t have sufficient internal memory and it’s just forum threads, bad customer review and extra email back-and-forth waiting to happen. If yours doesn’t have it then you can send it back to get the memory upgraded.

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