Looking for MegaRAM

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Door pitpan

Prophet (3145)

afbeelding van pitpan

21-11-2005, 23:32

Hi!

I'm looking for a 4 Mbit (512 KB) or higher MegaRAM cartridge. Anyone interested in selling or trading? I've got some nice MSX stuff around... I have posted this message also in the Brazilian forum.

Kind regards,

Edu Robsy

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Van Yukio

Paragon (1540)

afbeelding van Yukio

30-11-2005, 10:34

With the MEGARAM it is possible to use the playback of sound, even in the early models of MSX computers.

Van Yukio

Paragon (1540)

afbeelding van Yukio

30-11-2005, 10:34

Maybe I could send one MEGARAM cartridge to you.

Van pitpan

Prophet (3145)

afbeelding van pitpan

30-11-2005, 12:20

That would be great, Yukio!

At the moment I have the 2 Mbit (256 KB) version and it works great. I have coded a special megaROM to WAV converter, and now I can load megaROM games into my MSX using the cassette port: no need for diskdrive!

Besides that, the loading routine is very efficient: loading Nemesis takes about 90 seconds. It is cool to play such games in an unmodified MSX1 computer without diskdrive.

Van djh1697

Paragon (1601)

afbeelding van djh1697

30-11-2005, 15:26

pitpan, are you in the UK at the moment? I have a 512k MegaRAM, if you wanted to loan it for testing purposes? I am pleased that you managed to write a loader, is it possible to download the loader? It would be very impressive with the tape drive on my MSX1!

Van Yukio

Paragon (1540)

afbeelding van Yukio

30-11-2005, 18:08

That would be great, Yukio!

At the moment I have the 2 Mbit (256 KB) version and it works great. I have coded a special megaROM to WAV converter, and now I can load megaROM games into my MSX using the cassette port: no need for diskdrive!.

This sounds familiar.
Ok.

One 4 Mbit (512 KB) cartridge for you.Smile
Sure that I would need one too!

Van Yukio

Paragon (1540)

afbeelding van Yukio

07-12-2005, 04:17

What is your address?
Send a e-mail to me.

Van pitpan

Prophet (3145)

afbeelding van pitpan

07-12-2005, 10:45

e-mail sent Smile

Van Alexandre_Taito

Champion (325)

afbeelding van Alexandre_Taito

09-12-2005, 04:27

90 seconds to load a megaram game?!? 90 seconds to load a 128K game???????

128/90 = 1.42K/sec
1.42 * 8 = 11.3kbits/sec (with no error correction)

I'm very interested in knowing how the hell you got that! :O

Van Yukio

Paragon (1540)

afbeelding van Yukio

10-12-2005, 06:59

MEGARAM checked with CHKMEM.
64 pages.
OK.

Will you check the other cartridge?
Maybe you could test how to load games too ...

Van pitpan

Prophet (3145)

afbeelding van pitpan

10-12-2005, 12:54

Indeed, I have checked it now, and it only takes 70 seconds to load Nemesis (128 KB). Therefore, it is now:

128 / 70 = 1,83 K/sec
1.83 x 8 = 14,63 kbits/sec

Please note that this is the total load time: there is MSX standard loader, recorded at 2400 bauds. So the data itself takes less than that. Aproximately 60 seconds Wink

It uses a custom loader (directly reading the cassette status bit from the ports) and applies also BitBuster compression. That's why it is so fast!

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