Looking for MegaRAM

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By pitpan

Prophet (3145)

pitpan's picture

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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By Yukio

Paragon (1540)

Yukio's picture

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.

By Yukio

Paragon (1540)

Yukio's picture

30-11-2005, 10:34

Maybe I could send one MEGARAM cartridge to you.

By pitpan

Prophet (3145)

pitpan's picture

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.

By djh1697

Paragon (1601)

djh1697's picture

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!

By Yukio

Paragon (1540)

Yukio's picture

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!

By Yukio

Paragon (1540)

Yukio's picture

07-12-2005, 04:17

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

By pitpan

Prophet (3145)

pitpan's picture

07-12-2005, 10:45

e-mail sent Smile

By Alexandre_Taito

Champion (325)

Alexandre_Taito's picture

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

By Yukio

Paragon (1540)

Yukio's picture

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 ...

By pitpan

Prophet (3145)

pitpan's picture

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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