Sanyo Wavy 23 and The MegaFlashRom

By Odba1149

Supporter (5)

Odba1149's picture

12-12-2019, 03:16

Sanyo Wavy 23 and The MegaFlashRom
I have this specific combination of MSX2 and Flashcart and was curious if anybody else used this setup? I am new to the whole MSX thing and eager to dig into a bunch of stuff, but for whatever reason I have not been able to get back to the Multimente after using Disk Emulation mode. "0" doesn't work, ESC doesnt work, DEL doesnt work. No idea?

Any ideas? Any other intricacies with this particular model? It seems rather uncommon.

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By Guillian

Prophet (3258)

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12-12-2019, 08:25

I have tested on openMSX and works fine.
Be sure you hold "0" (zero) in the main keyboard until Nextor/Multimente boots. If that does not work, perhaps "0" key does not work. Do not use the numeric pad.

Also, try to erase NEXT_DSK.DAT file in the microSD card.

By Odba1149

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12-12-2019, 16:41

My hope was to be able to boot into Multimente in order to erase that NEXT_DSK.DAT file without having to take the sd card out each time and use my PC to do so. Unfortunately, in trying to figure out a way to boot back into Multimente, I tried to clear the flash ROM by booting into recovery mode and selecting item 3 "Clear Rom", but that apparently isn't the flash Rom, but the entire Multimente Rom! So I tried to reinstall the kernnal (option 4) hoping that would include the Multimente Rom... but no. And now I am afraid I have lost control of my cartridge.

By Guillian

Prophet (3258)

Guillian's picture

13-12-2019, 09:26

Holding 0 (zero) key must disable the DSK loading. If that does not work, probably your "0" key is not working.

F3 option is "Erase ROM disk". In the user's manual it is described like "Erase the disk image installed as ROM disk ( A: )"

Reinstalling the ROM disk is not too complex:
- Download: https://msxcartridgeshop.com/bin/files.zip
- Unpack it and copy the files on the root of your SD card
- Put the card in the cartridge and switch on your computer
- Nextor (operative system) should boot and you will get a "A>" prompt
- Type in the command line:
OPFXSD ROMDISK.DSK /id
and press RETURN

Also, the recovery process can be donme in a few steps:
Just to confirm. The steps to restore the software are:
- Copy to an *EMPTY* SD card the file KERNEL.DAT
https://www.msxcartridgeshop.com/bin/kernel.zip

- Enter recovery mode (holding cursor up while booting)
- Select F4 option
The recovery process should take a few seconds
If the recovery process can’t find the kernel, then try again holding SELECT key when pressing "Y" after selecting F4 option.

Then, in the next boot MultiMente should boot.

By Odba1149

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15-12-2019, 02:21

Ok, swear I did all of that before. But i followed this guide step by step and it worked! Thanks! Now off to try and figure out how to get back to multimente after running disk emulation.

By sdsnatcher73

Paladin (726)

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15-12-2019, 08:02

MFR is setup to use Nextor’s disk emulation from MultiMente by default. This means Nextor will continue to boot the disk you started UNLESS you press 0 (zero) in the alphanumeric part of the keyboard (don’t use the numberpad above the cursor keys). Nextor will then disregard the NEXT_DSK.DAT file. If you want you can then delete that file (so you won’t have to press 0 every boot).

To make your gaming life easier I recommend you setup SofaRun on your SD card. It’s rom and disk emulation is on par with Nextor and opfxsd but on reset you will always boot into Nextor.

Also if you want to boot from your SD card by default (and skip the ROM disk) you can put a file NEXTOR.DAT on the SD root. Make sure you have NEXTOR.SYS and COMMAND2.COM on the SD (and all tools you want to use).

By Odba1149

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16-12-2019, 07:31

Thanks! That is super helpful information. I think the 0 was purely not working to get me back into Multimente on reboot because I also still had a ROM image loaded in drive b? Does that make sense? I used the Recovery Mode to delete that Rom (F1) and then rebooted using 0 and i was able to get back to Multimente.

By sdsnatcher73

Paladin (726)

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16-12-2019, 17:53

Well ROM images are not in a drive as such but they do take precedence over anything else. You can bypass a ROM flashed with OPFXSD by using the ESC key (and remove it with OPFXSD /C once you are in Nextor).

With SofaRun you can play all ROM images as well on the MFR but they will not persist after a reset (so again a strong argument for getting that up and running).

By Pencioner

Paragon (1035)

Pencioner's picture

16-12-2019, 18:44

sdsnatcher73 wrote:

You can bypass a ROM flashed with OPFXSD by using the ESC key (and remove it with OPFXSD /C once you are in Nextor).

So in case of having both ROM and disk you have to press ESC + 0 at the same time (just pointing original poster to that fact)

By Odba1149

Supporter (5)

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19-12-2019, 03:14

I never tried pressing both. That makes some sense. Thanks again!