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| Looking for MegaRAM
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pitpan
msx master
Berichten: 1367 |  Geplaatst: 21 November 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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Yukio
msx professional
Berichten: 762 | Geplaatst: 30 November 2005, 10:34 |
Maybe I could send one MEGARAM cartridge to you.
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Yukio
msx professional
Berichten: 762 | Geplaatst: 30 November 2005, 10:34 |
With the MEGARAM it is possible to use the playback of sound, even in the early models of MSX computers.
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pitpan
msx master
Berichten: 1367 | Geplaatst: 30 November 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.
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djh1697
msx professional
Berichten: 537 | Geplaatst: 30 November 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!
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Yukio
msx professional
Berichten: 762 | Geplaatst: 30 November 2005, 18:08 |
Quote:
| 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!.
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This sounds familiar.
Ok.
One 4 Mbit (512 KB) cartridge for you. 
Sure that I would need one too! |
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Yukio
msx professional
Berichten: 762 | Geplaatst: 07 December 2005, 04:17 |
What is your address?
Send a e-mail to me.
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pitpan
msx master
Berichten: 1367 | Geplaatst: 07 December 2005, 10:45 |
e-mail sent
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Alexandre_Taito
msx freak
Berichten: 183 | Geplaatst: 09 December 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!  |
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Yukio
msx professional
Berichten: 762 | Geplaatst: 10 December 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 ...
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pitpan
msx master
Berichten: 1367 | Geplaatst: 10 December 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 
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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Alexandre_Taito
msx freak
Berichten: 183 | Geplaatst: 10 December 2005, 13:12 |
I'm very curious to see this working  |
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pitpan
msx master
Berichten: 1367 | Geplaatst: 10 December 2005, 13:30 |
It has some problems on some computers though. But I can send you one WAV to test it, if you want to. It has never been tested on a Brazilian MSX computer.
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djh1697
msx professional
Berichten: 537 | Geplaatst: 10 December 2005, 16:52 |
Quote:
| IIt 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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You are not using BIOS then? Will your loader therefore work not with OCM if it had a tape port? Not if you haven't followed the rules! It wont work with my TurboR either  |
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pitpan
msx master
Berichten: 1367 | Geplaatst: 10 December 2005, 17:09 |
Probably not. I wanted to test it on the OCM at Barcelona's meeting, but people was so busy playing SPACE MANBOW on it. |
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