The Big MegaFlashROM SCC+ SD Topic

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Van snout

Ascended (15187)

afbeelding van snout

05-12-2013, 15:21

During boot? I don't think the 8245 actually counts memory there.

Van Marq

Champion (387)

afbeelding van Marq

05-12-2013, 15:23

It does show the memory amount at boot with another mapper (R&J. Jansen Memory-Mapper 256/512). Tried both ports, too.

Van Marq

Champion (387)

afbeelding van Marq

05-12-2013, 15:25

Ok, there's something funky going on - maybe the the other cart updates the number itself or something. TESTRAM shows the correct amount and it works fine, too.

Van Guillian

Prophet (3516)

afbeelding van Guillian

05-12-2013, 15:50

Probably that only happens when you power on your computer, not after a reset, right?
Some MSXs boot faster than the FPGA is loaded, that's why you can't see the RAM on the boot screen but it is available on DOS2. Just type MEM on DOS 2 command and it will show the amount of RAM in each slot.
You can try to press RESET for 1sec (or less) just after powering on your computer to see the right amount of RAM in the boot screen.

Van Marq

Champion (387)

afbeelding van Marq

05-12-2013, 16:04

It's always 128/128, no matter how I boot or reset. But MEM does indeed show it right. Could be some bug of the 8245 ROM then.

Van mars2000you

Enlighted (6442)

afbeelding van mars2000you

05-12-2013, 16:19

This bug is on ALL MSX2 Bios roms, it has been fixed on MSX2+/turboR.

Van Guillian

Prophet (3516)

afbeelding van Guillian

05-12-2013, 16:41

Then I don't understand why your other memory mapper shows the right amount :/

Van Marq

Champion (387)

afbeelding van Marq

05-12-2013, 23:31

A positive observation here: my Panasonic FS-A1 that was pretty much a useless piece of junk (can't boot DOS2 with just 64k RAM, a separate mapper won't work) got a new life with the mapper. It's still not a fine machine, but at least good for something Smile

Van megatron-uk

Resident (50)

afbeelding van megatron-uk

08-12-2013, 13:11

I've just received my new MFR to go with my Sony F1XDJ - 768Kbytes of memory woohoo! :-)

Anyway, I've backed up the default a: romdisk to sd card, and now want to boot directly from the sd card itself, so that I can more easily edit autoexec.bat, add utils directories to the path, set screen colors etc.

What's the reccomended way to go about permanently disabling the default rom disk on boot so that I don't have to hold any key combinations down every time I power on?

Van Guillian

Prophet (3516)

afbeelding van Guillian

08-12-2013, 13:13

Just enter recovery mode (press cursor UP while booting) and select F3 to erase ROM disk.

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