One chip MSX improvement project

Champion (446)

08-10-2012, 11:17

@KdL: No, there are no interferences at all: I'm recording this directly from the DE1 output, I've heard these artifacts since I dirts tried Eggerland in the DE1, and it has been installed in different places since I did.

And what about the music problems in Zombie Monsters? That's PSG playing a channel wrong, not an interference. No interference could cause that.

By KdL

Paragon (1436)

08-10-2012, 14:22

hi, have you checked with another (old) firmware?

By vanfanel

Champion (446)

08-10-2012, 16:13

@KdL: Yes, these PSG problems are here since the first Altera DE1 version. I didn't report them because I thought that was how the games sounded, until I saw them in a real MSX and I noticed the PSG problems.

By Retrofan

Paragon (1281)

08-10-2012, 17:21

KdL wrote:

Retrofan wrote:

@Kdl: with MP3 Player from Sunrise in 1chipMSX, I do hear some "clicks"/interruptions when playing MP3 files in Turbo mode. Bug? It should work with at least 7 Mhz when playing 320kbps mp3 files on real msx. It works fine on Turbo-R btw.

Hi! The slots of 1chipMSX works at 3.58MHz, 5.37MHz and 10.74MHz
I think that 10.74MHz is very fast for many cartridge!!!

For example, my Music Module with 256k sample ram
freeze the system at 10.74MHz when I play the samples with MoonBlaster 1.4

Retrofan wrote:

@KdL: is it possible to use both slots on 1chipMSX and also emulate SCC+ without losing 1 slot?

You are suggest to use a sub-slot for SCC+ but the L/M code of most of games is programmed to work on the primary slots only. I will wait a reply from experts of MRC...

With 5.38 MHz it's a lot better, but sometimes it still has some little interruptions, while the Turbo-R hasn't. Maybe I can alter the external clockspeed and just use 10.74 MHz as internal clock speed?
For slot layout, please look at Playsoniq which also has SCC-I support in sub-slot. If possible I want to use emulated SCC-I in subslot and real cartridges in slot 1 and 2.

By caro

Champion (512)

09-10-2012, 05:54

vanfanel wrote:

-Eggerland Mistery: strange high-pitch tone in the tittle screen when music plays.

It can be fixed.

vanfanel wrote:

As you can see, OCM is also missing the pop-pop-pop sounds when you enter a password character!

In the latest version of BIOS for OCM, keyboard click OFF in BASIC.
Therefore, there is no characteristic sound pop pop pop when setting password.

By Capitan_Goto

Master (168)

09-10-2012, 09:45

Hi mates...just a question, maybe a little offtopic...It´s possible to add cardtridges slots to an DE1 board? is a very difficult task? Thanks in advance!

By x-nen Aivalahostia

Paragon (1484)

09-10-2012, 10:11

Yes add carditges is possible, You can find info at caro.su , it is not a dificult task it is but if you won you can buid a board to add a carditge slots + joystic port + mouse port and cassete port, for the first board i take over 1,5 year, for the second 3 months, i'm not an expert i'm an msx fan!

By vanfanel

Champion (446)

09-10-2012, 11:20

Quote:

It can be fixed.

These are the exact words that I dreamed about hearing, coming from the person I expected!!!
Would it also fix "Invasion of the Zombie Monsters" wrong PSG music? This game is very important in the spanish MSX scene

Zombie MOnsters: Bad PSG in Altera DE1

Zombie Monsters correct PSG music

By Capitan_Goto

Master (168)

09-10-2012, 12:56

@x-nen...so if I get you right....you can made one of these expansion board...ok...I´m thinking about sell my NMS 8255 and get one DE1 plus the expansion board...don´t know if is a better option than upgrade the NMS to a MSX2+, but i feel that get some of the new hardware solution is much better than upgrade the old stuff...advices and tips are wellcome

in spanish: gracias por la respuesta. Asi que puedes hacerlas...si me decido a hacerme con una DE1..podria comprarte una de esas expansiones?

By x-nen Aivalahostia

Paragon (1484)

09-10-2012, 19:24

I'm trying to make a pcb gold de0 DE1, I think that the same schema. I'm currently learning to do. No how it ready. On the last msx meeting in Barcelona (MSX Ru) "Floppyderno" show me a PBC for DE1 and we test it, It has a little sound bug, but work's fine.If you won now an PBC for DE1 or DE0 don't trust on me, in the future maybe. Both options are good

in spanish: Estoy intentando hacer un circuito impreso para la DE1 y la DE0, en ambas es el mismo esquema, de momento estoy aprendiendo, y no se cuando lo tendre listo, pero en la ultima Ru de barcelona hable con "Floppyderno" y me mostro un circuito impreso, lo probamos y a exepcion de un fallo en el sonido, el resto funcionaba bien. Las dos opciones que plantes son buenas, actualizar o hacerte con una de1 o de0.