The Big MegaFlashROM SCC+ SD Topic

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By sdsnatcher73

Paragon (1149)

sdsnatcher73's picture

03-08-2020, 22:11

Guillian wrote:

I have released a new version of recovery menu: RECOVERY V1.14
This version will automatically skip the firmware of some MSX models:

Support for the NMS8220 would be appreciated if possible. Out of curiosity how do you manage to bypass those firmwares?

By Manuel

Ascended (16980)

Manuel's picture

03-08-2020, 22:59

Guillian wrote:
Manuel wrote:

Note that the firmware skip didn't seem to work on the fs-a1 for "pintz and Amiga".

I tested the new feature on openMSX and it worked fine.

I have tested it on my FS-A1 (black) and it works fine. So not sure by it does not work for "pintz and Amiga"

Note that this feature is enabled only in MFR SD 512KB RAM.

You can see it happening here: https://youtu.be/LIHA4BtupdA

They have the one with 512kB RAM. I somehow can't find the exact point where we discuss it, but you can see it happening several times during this live stream.

By Guillian

Prophet (3361)

Guillian's picture

04-08-2020, 09:25

sdsnatcher73 wrote:

Support for the NMS8220 would be appreciated if possible. Out of curiosity how do you manage to bypass those firmwares?

Added NMS8220 RECOVERY V1.14b

To bypass the firmware I just take control of the BIOS cartridge search routine, and skip the slot where the firmware is.

Manuel wrote:
Guillian wrote:
Manuel wrote:

Note that the firmware skip didn't seem to work on the fs-a1 for "pintz and Amiga".

I tested the new feature on openMSX and it worked fine.

I have tested it on my FS-A1 (black) and it works fine. So not sure by it does not work for "pintz and Amiga"

Note that this feature is enabled only in MFR SD 512KB RAM.

You can see it happening here: https://youtu.be/LIHA4BtupdA

They have the one with 512kB RAM. I somehow can't find the exact point where we discuss it, but you can see it happening several times during this live stream.

I do not know why it does not work for them. Perhaps the ROM is different to the one in openMSX or my FS-A1.
If you manage to reproduce it on openMSX, I could try to investigate it.

By Guillian

Prophet (3361)

Guillian's picture

06-08-2020, 12:06

Guillian wrote:
sdsnatcher73 wrote:

Support for the NMS8220 would be appreciated if possible.

Added NMS8220 RECOVERY V1.14b

@sdsnatcher73 Could you test if it works fine?

By SkalTura

Master (228)

SkalTura's picture

07-10-2020, 16:36

Anyone any experience using the MegaRom SCC+ SD in combination with an FPGA MSX ?

I received my SX-1+ Mini MSX from 8Bits4Ever yesterday, but it sometimes won't start the MegaRom...
In some cases it bypassed the MegaRom and starts into basic as if the MegaRom was not even inserted, and sometimes the MSX doesn't even startup at all. It just shows the blue startup screen before the boot logo and just hangs.
Tried swapping it to the other slot, same result. Dipswitches are set to both slots enabled.

And I also found that when it does start, not all my games work (Dix for example).
When I use the MegaRom in my Sony HB-F700P (modified to MSX2+) all games work normally.

By Guillian

Prophet (3361)

Guillian's picture

07-10-2020, 19:21

SkalTura wrote:

Anyone any experience using the MegaRom SCC+ SD in combination with an FPGA MSX ?

AFAIK, it works fine on 1chip MSX.

By Tominator

Supporter (1)

Tominator's picture

08-10-2020, 04:47

I've owned the MegaRom SCC+ 2 slot card for a couple of years now and just got a working Panasonic MSX 2+

I added .rom and .dsk to a SD card and everything worked great. I then ran a dsk and then deleted the .dat for that dsk, but now the cart always boots to Basic. It shows Microsoft and then Nextor Basic and almost everything I type shows Syntax Error?

I tried reinstalling the kernel.dat, but same results. How do I get back to the menu?

Thanks in advance.

By Guillian

Prophet (3361)

Guillian's picture

08-10-2020, 08:45

Holding 0 (zero) key while booting and/or deleteing NEXT_DSK.DAT file on your card, should skip the loaded DSK.
If the computer boots into Nextor BASIC, then probably the ROM Disk have been erased (i.e.: from recovery menu)

In order to reinstall the ROM Disk you can do:
- 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

That will reinstall ROM Disk (drive A: )

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