list of interested third batch MSX Zemmix Neo:

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By mfeingol

Champion (293)

mfeingol's picture

21-12-2015, 01:38

Raymond:

I tried a second VGA cable, but the output looks exactly the same.

SW2 enabled and SW3 disabled should get rid of the scanlines. This mode looks pretty blocky to me and I prefer the scanlines look, but the colors look much better.

I'm beginning to wonder now whether installing a KDL firmware might fix some of these issues...

By mfeingol

Champion (293)

mfeingol's picture

21-12-2015, 02:40

And as an aside, I put the Zemmix Neo in RGB mode, and used the cable from a PlaySoniq to connect the VGA out to a SCART to HDMI converter. The audio worked but no there was no video, just a black screen. The video pin layout probably doesn't match.

I also discovered that if I reset the Zemmix Neo a few times, the HDMI output through my Mini VGA2HDMI will sometimes display the right colors. So that issue may be the converter, and I've ordered a different one on Ebay.

By AxelStone

Prophet (3189)

AxelStone's picture

23-12-2015, 18:02

@mfeingol I'm having similar troubles with VGA -> Scart conversion. I've bought 2 different cables, designed for Zemmix Neo: this one (activated by battery) and this one (activated by USB).

In both cases I obtain a distorsed image, althought DS are configured as schemas shows, this is SW2/SW3 = OFF / ON. Someone has tried VGA to Scart mode sucessfully?

Thanks.

By sd_snatcher

Prophet (3608)

sd_snatcher's picture

23-12-2015, 18:38

@AxelStone

This issue also happens on the OCM.

I guess the problem is the same I described in the pg-85 of the One chip MSX improvement project thread: in 15 KHz mode, the firmware outputs audio on pin-14 instead of VSYNC. This is certain trouble with existing VGA->SCART adapters.

You can try to explain your problem there.

BTW, for other uses (or when the OCM firmware gets fixed), I'd suggest this adapter, since its easy to build and doesn't require any external power.

By AxelStone

Prophet (3189)

AxelStone's picture

23-12-2015, 21:59

@sd_snatcher You are true, that seems the problem. Does it means that sound is transfered throught VGA output? Shocked! My cable takes audio from audio output of RCA, as you can see on the photo.

I'd like a fix as you described, since it should be better to take audio from RCA and use VGA pin14 for VSYNC. By the moment I'm not going to build more cables, since I bought 2 Sad .

Thanks for the info.

By Opethian

Master (147)

Opethian's picture

01-02-2016, 16:03

got mine I am very happy with it great work

thanks to all those involved!

By Fabf

Champion (266)

Fabf's picture

01-02-2016, 18:10

Also received mine Smile
Many thanks to all the team !

By mtn

Champion (269)

mtn's picture

13-02-2016, 12:09

I just want to mention that I think people must be careful when inserting joy{stick|pad|} or mouse in the frontal d-sub connectors, because all my (modded) megadrive pads, their dsub connectors, cleaned with isopropyl alcohol and all, still is very tight fit.. and it gives mechanical stress to solder joint between dsub and pcb just to get it in.. (even though I sweet talked to the port and all)

I assume its the old megadrive joypads thats worn at their connectors, but just a word of caution so noone by mistake punish their machine. Smile

By AxelStone

Prophet (3189)

AxelStone's picture

13-02-2016, 20:51

mtn wrote:

I just want to mention that I think people must be careful when inserting joy{stick|pad|} or mouse in the frontal d-sub connectors, because all my (modded) megadrive pads, their dsub connectors, cleaned with isopropyl alcohol and all, still is very tight fit.. and it gives mechanical stress to solder joint between dsub and pcb just to get it in.. (even though I sweet talked to the port and all)

I assume its the old megadrive joypads thats worn at their connectors, but just a word of caution so noone by mistake punish their machine. Smile

This problem is very usual with MegaDrive pads and MSX ports, unfortunately. Mi Philips VG8235 has his port#1 damaged due to the hard fit of MD adapted pads Crying , I'll have to take a look to the soldering points.

By mtn

Champion (269)

mtn's picture

14-02-2016, 01:08

AxelStone wrote:
mtn wrote:

I just want to mention that I think people must be careful when inserting joy{stick|pad|} or mouse in the frontal d-sub connectors, because all my (modded) megadrive pads, their dsub connectors, cleaned with isopropyl alcohol and all, still is very tight fit.. and it gives mechanical stress to solder joint between dsub and pcb just to get it in.. (even though I sweet talked to the port and all)

I assume its the old megadrive joypads thats worn at their connectors, but just a word of caution so noone by mistake punish their machine. Smile

This problem is very usual with MegaDrive pads and MSX ports, unfortunately. Mi Philips VG8235 has his port#1 damaged due to the hard fit of MD adapted pads Crying , I'll have to take a look to the soldering points.

I guess I can just cut the connector off from the megadrive-pad and throw in a autofire circuit while at it, and put on a proper metal DE-9 instead of the rubberplastic type

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